Abolghasem Moghimi - Academia.edu (original) (raw)
Papers by Abolghasem Moghimi
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Materials Science in Semiconductor Processing, 2021
Renormalized products of the generalized free field and its derivatives are shown to exist as con... more Renormalized products of the generalized free field and its derivatives are shown to exist as continuous sesquilinear forms on the C~-vectors of the adjusted free Hamiltonian. Smeared in space and time, with some restrictions on the time smearing, and mild restrictions on the generalized free field, they are shown to be densely defined operators, admitting a self-adjoint extension when the smearing is even in time. Lorentz covariance of these products is shown.
Polish Journal of Chemistry, 2006
The proton transfer compound, (DA18C6H2)(pydcH) 2 .0.25H 2 O, has been prepared from the reaction... more The proton transfer compound, (DA18C6H2)(pydcH) 2 .0.25H 2 O, has been prepared from the reaction between 1,4,10,13-tetraoxa-7,16-diazacyclooctadecane, diaza-18-crown-6 (DA18C6), and 2,6-pyridinedicarboxylic acid, dipicolinic acid (pydcH 2 ). The characterization was performed using 1 H and 13 C NMR, IR spectroscopy and single crystal X-ray diffraction analysis. The asymmetric unit consists of one (DA18C6H 2 ) 2+ cation adopting a sigmoidal conformation which interacts with two (pydcH) - anions via hydrogen bonds involving the protonated amine groups of the diazacrown ether. -COOH··· - OOC- head-to-tail hydrogen bonds generate 2D undulating layers along [100] and [001] in the crystal lattice. The protonation constants of DA18C6 and pydcH 2 and equilibrium constants for the reaction of the two reactants were determined by potentiometric pH titration. The solution studies supported the formation also in solution of(DA18C6H 2 )(pydcH) 2 as the most abundant species atpH = 3.4.
![Research paper thumbnail of Copper(II) ion catalytic oxidation of o-phenylenediamine and characterization, X-ray crystal structure and solution studies of the final product [DAPH][H3O][Cu(dipic)2]·3H2O](https://attachments.academia-assets.com/109854673/thumbnails/1.jpg)
](Journal of Molecular Structure, 2015
h i g h l i g h t s DAPH[H 3 O][Cu(dipic)]Á3H 2 O was synthesized and characterized by UV-Vis and... more h i g h l i g h t s DAPH[H 3 O][Cu(dipic)]Á3H 2 O was synthesized and characterized by UV-Vis and IR spectroscopy. X-ray crystallography showed two molecules of o-phenylenediamine were reacted. Copper nitrate act as the oxidizing agent. Solution behavior of Cu(II) complex was studied.
Research on Chemical Intermediates, 2014
Zeitschrift für anorganische und allgemeine Chemie, 2004
A novel 1:2 proton transfer self‐associated compound LH2, (GH+)2(pydc2—), was synthesized from th... more A novel 1:2 proton transfer self‐associated compound LH2, (GH+)2(pydc2—), was synthesized from the reaction of dipicolinic acid, pydcH2, (2, 6‐pyridinedicarboxylic acid), and guanidine hydrochloride, (GH+)(Cl—). The characterization was performed using IR, 1H and 13C NMR spectroscopy and single‐crystal X‐ray diffraction. LH2 · H2O crystallizes in the space group C2/c of the monoclinic system and contains eight molecules per unit cell. The unit cell dimensions are: a = 26.480(5)Å, b = 8.055(2)Å, c = 14.068(3)Å. The first coordination complex (GH)2[Cd(pydc)2] · 2H2O, was prepared using LH2 and cadmium(II) iodide, and characterized by 1H and 13C NMR spectroscopy and X‐ray crystallography. The crystal system is triclinic with space group P1¯ with one molecule per unit cell. The unit cell dimensions are: a = 8.5125(7)Å, b = 11.0731(8)Å, c = 13.2404(10)Å. The cadmium(II) atom is six‐coordinated with a distorted octahedral geometry. The two pydc2— units are almost perpendicular to each oth...
Synthetic Communications, 2014
Zeitschrift für Kristallographie - New Crystal Structures, 2003
The reaction between LH 2 , [pyda.H 2 ][pydc], (pyda = 2,6pyridinediamine and pydc. H 2 = 2,6-pyr... more The reaction between LH 2 , [pyda.H 2 ][pydc], (pyda = 2,6pyridinediamine and pydc. H 2 = 2,6-pyridinedicarboxylic acid), ligand with palladium(II) chloride leads to the formation of [pyda.H] 2 [PdCl 4 ]. The crystal structure of the compound was determined by X-ray diffraction. The crystal system is triclinic with space group P and one molecule per unit cell. The unit cell dimensions are a = 6.900(3) Å, b = 7.898(3) Å, c = 8.025 (3) Å, with > = 103.302(14)º, @ = 104.068(14)º and A = 92.415(12)º. The final R value is 0.0602 for 1988 reflections. The presumably of the formation [pyda.H][Pd(pydc)(pydc.H)], [Pd(pydc.H) 2 ] and [pyda.H]Cl species, was studied by IR, ESI/MS, 1 H NMR, 13 C NMR spectroscopy, and elemental analysis.
Zeitschrift für Kristallographie - New Crystal Structures, 2001
Crystal Research and Technology, 2007
The different complexation methods of a proton transfer compound, (phenH) 2 (pydc) (phen=1,10phen... more The different complexation methods of a proton transfer compound, (phenH) 2 (pydc) (phen=1,10phenanthroline; pydcH 2 = pyridine-2,6-dicarboxylic acid), are discussed and the formation of [Sn(pydc)(phen)(OH) 2 ]•3H 2 O (1), {[Sb(pydc)(phen)] 2 O}•2DMSO•4H 2 O(2) and [(Tl(pydcH)] n (3) complexes are reported. The characterization was performed using IR spectroscopy and X-ray diffraction. The structures of Sn(IV) and Sb(III) complexes show that both cationic and anionic fragments of the starting proton transfer compound have been involved in the complexation. Whereas the structure of Tl(I) complex demonstrates that only the anionic fragment of (phenH) 2 (pydc) is contributed to the complexation. The complexes 1-3 show a variety of structural features including mononuclear, binuclear and polymeric structures. In compounds (1), (2) and (3) a large number of hydrogen bonds are observed. These interactions play an important role in the formation and stabilization of supramolecular systems in the crystal lattices.
Acta Crystallographica Section E Structure Reports Online, 2004
Analytical Sciences: X-ray Structure Analysis Online, 2008
Synlett, 2017
N,N-Disubstituted hydroxylamines were prepared directly from secondary amines by a reliable metho... more N,N-Disubstituted hydroxylamines were prepared directly from secondary amines by a reliable method using an oxidizing task-specific ionic liquid, choline peroxydisulfate. The operational simplicity, high selectivity, and green reaction conditions, make this method efficient and practical.
Journal of Inclusion Phenomena and Macrocyclic Chemistry, 1998
A synthetic procedure has been developed for the preparation of styrene/4'-vinyl-benzo-24-cro... more A synthetic procedure has been developed for the preparation of styrene/4'-vinyl-benzo-24-crown-8 copolymer (SPV-B24C8). The resulting copolymer was used as a membrane carrier to construct a K+ ion-selective electrode. The electrode exhibits a Nernstian response for K+ ions over a wide concentration range. The nature of the plasticizer, the additive, the concentration of internal solutions in the electrodes and the composition
Organic Process Research & Development, 2004
Production of chlorpyrifos via the phase-transfer-catalyzed reaction of O,O-diethylphosphorochlor... more Production of chlorpyrifos via the phase-transfer-catalyzed reaction of O,O-diethylphosphorochloridothioate and the sodium salt of 3,5,6-trichloropyridin-2-ol was reinvestigated. The formation of sulfotep (the major byproduct) and the yield are influenced by the nature and concentration of the ...
Journal of Solution Chemistry, 2014
The kinetics of the complexation reactions of Ba2+ and Sr2+ in AN and 95:5 wt% AN:DMF were studie... more The kinetics of the complexation reactions of Ba2+ and Sr2+ in AN and 95:5 wt% AN:DMF were studied and the kinetic parameters for the decomplexation step, Ea, ΔH#, ΔS# and ΔG#, were determined in the temperature range of 17–47 °C. Kinetic parameters reveal that both dissociative and biomolecular mechanisms contribute to the exchange of the 30C10 complexes. Furthermore, the 30C10·Ba2+ complex was synthesized and its crystal structure was determined through single crystal X-ray analysis.
Zeitschrift f�r anorganische und allgemeine Chemie, 2005
The proton transfer compound LH 2 , (phenH ϩ) 2 (pydc 2Ϫ), has been prepared from 1,10-phenanthro... more The proton transfer compound LH 2 , (phenH ϩ) 2 (pydc 2Ϫ), has been prepared from 1,10-phenanthroline, phen, and 2,6-pyridinedicarboxylic acid, (dipicolinic acid), pydcH 2. Characterization was performed using solution and solid phase CP/MAS 13 C NMR and IR spectroscopy. The reactions of this adduct with ZnSO 4 • 7H 2 O and Zn(NO 3) 2 • 4H 2 O give the complexes, [Zn(pydc) 2 ][Zn(phen) 2 (H 2 O) 2 ] • 7H 2 O (1) and [Zn(phen) 3 ] 4-(H(Hpydc) 2)(NO 3) 7 • 26H 2 O (2), respectively. These complexes were characterized by 1 H and 13 C NMR spectroscopy and single crystal X-ray analysis. The complexes crystallize in the triclinic space group P1 with Z ϭ 2. The unit cell dimensions for complex 1 and 2 are: a ϭ 9.9838(9) Å , b ϭ 14.7483(13) Å , c ϭ 14.8365(13) Å and a ϭ 12.640(4) Å , b ϭ 15.855(5) Å , c ϭ 21.830(7) Å , respectively. In complex 1 (pydc 2Ϫ) and phen, are tri-and bidentate ligands, respectively, and an anionic [Zn(pydc) 2 ] 2Ϫ and cationic [Zn(phen) 2 (H 2 O) 2 ] 2ϩ complex are formed simultaneously. In complex 2, three phen participate in complexation leaving hydrogenbis(pyridine-2-carboxylate), (H(Hpydc) 2) Ϫ as a supramolecular anion. The fragments (H(Hpydc) 2) Ϫ , 7 NO 3 Ϫ , and 26 H 2 O in com-Kristallstrukturen und Untersuchungen in Lösung von zwei neuene Zink(II)-Komplexen einer Protontransfer-Verbindung aus 2,6-Pyridindicarboxy-Säure und 1,10-Phenanthrolin ؊ Beobachtung starker intermolekularer Wasserstoffbrückenbindungen Inhaltsübersicht. Die Protontransfer-Verbindung LH 2 , (phenH ϩ) 2 (pydc 2Ϫ), wurde aus 1,10-Phenanthrolin, phen, und 2,6-Pyridindicarboxy-Säure, (Dipicolin-Säure), pydcH 2 , dargestelltund charakterisiert durch CP/MAS-13 C-NMR in Lösung und festem Zustand sowieIR-Spektroskopie. Die Reaktion dieses Addukts mit ZnSO 4 • 7H 2 O bzw. Zn(NO 3) 2 • 4H 2 O führte zu Komplexen mit der Zusammensetzung [Zn(pydc) 2 ][Zn(phen) 2 (H 2 O) 2 ] • 7H 2 O (1) und [Zn(phen) 3 ] 4 (H(Hpydc) 2)(NO 3) 7 • 26H 2 O (2), die ebenfalls mit 1 Hund 13 C-NMR spektroskopisch and durch Röntgenstrukturanalyse charakterisiert wurden. DieKomplexe kristallisieren in der triklinen Raumgruppe P1 mit Z ϭ 2. Die Gitterparameter für 1 und 2 sind: a ϭ 9.9838(9) Å , b ϭ 14.7483(13) Å , c ϭ 14.8365(13) Å bzw. a ϭ 12.640(4) Å , b ϭ 15.855(5) Å , c ϭ 21.830(7) Å. Im Komplex 1 fungieren die Eddukte (pydc 2Ϫ) und phen als drei-und zweizähnige Liganden und es wird sowohl ein [Zn(pydc) 2 ] 2Ϫ-Anion-als auch ein [Zn(phen) 2 (H 2 O) 2 ] 2ϩ-Kation-Komplex gleichzeitig gebildet. Im Fall von Komplexes 2 nehmen drei phen Moleküle an der Koordination teil und es wird ein supermolekulares Anion aus Hydrogen-160
Zeitschrift f�r anorganische und allgemeine Chemie, 2005
The 1:1 proton transfer compound LH 2, (creatH) ϩ (pydcH) Ϫ , has been prepared from the reaction... more The 1:1 proton transfer compound LH 2, (creatH) ϩ (pydcH) Ϫ , has been prepared from the reaction of creatinine, creat, and dipicolinic acid, pydcH 2 , (2,6-pyridinedicarboxylic acid) and characterized using IR, 1 H and 13 C NMR spectroscopy. The first coordination complex (creatH)[Zn(pydc)(pydcH)]•4H 2 O, was prepared using LH 2 and zinc(II) nitrate, and characterized using IR, 1 H and 13 C NMR spectroscopy and single crystal X-ray crystallography. The crystal system is triclinic with space group P 1 with two molecules per unit cell. The unit cell dimensions are a ϭ 8.085(2) Å , b ϭ 10.802(4) Å , c ϭ 13.632(4) Å , α ϭ 104.98(2)°,β ϭ 90.31(2)°a nd γ ϭ 92.55(3)°. The structure has been refined to a final value for the crystallographic R factor of 0.0381 based on 3003 reflections. The zinc atom is six-coordinated with a distorted octahedral geometry. The (pydc) 2Ϫ and (pydcH) Ϫ units are almost perpendicular to each other. Extensive hydrogen bondings between carboxyl
Zeitschrift f�r anorganische und allgemeine Chemie, 2005
Starting with a zirconium salt and LH 2 , (pydaH 2) 2ϩ (pydc) 2Ϫ , (pydaϭ2,6-pyridinediamine; pyd... more Starting with a zirconium salt and LH 2 , (pydaH 2) 2ϩ (pydc) 2Ϫ , (pydaϭ2,6-pyridinediamine; pydcH 2 ϭ2,6-pyridinedicarboxylic acid), as a 1:1 proton transfer self-associated compound, two different compounds were resulted. One of them is a new complex of Zr IV with a flat pyridine containing ligand and structure of (pydaH) 2 [Zr(pydc) 3 ] • 5H 2 O (1) and the other, (pydaH) ϩ (NO 3) Ϫ (2) is an ion pair with no zirconium ion. The zirconium(IV) complex (1) is crystallized in triclinic system with P1 space group and Zϭ2, the crystallographic parameters are: aϭ 10.612(5) Å , bϭ10.617(5) Å , cϭ16.815(8) Å , Ͱϭ103.654(9)°, βϭ
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Materials Science in Semiconductor Processing, 2021
Renormalized products of the generalized free field and its derivatives are shown to exist as con... more Renormalized products of the generalized free field and its derivatives are shown to exist as continuous sesquilinear forms on the C~-vectors of the adjusted free Hamiltonian. Smeared in space and time, with some restrictions on the time smearing, and mild restrictions on the generalized free field, they are shown to be densely defined operators, admitting a self-adjoint extension when the smearing is even in time. Lorentz covariance of these products is shown.
Polish Journal of Chemistry, 2006
The proton transfer compound, (DA18C6H2)(pydcH) 2 .0.25H 2 O, has been prepared from the reaction... more The proton transfer compound, (DA18C6H2)(pydcH) 2 .0.25H 2 O, has been prepared from the reaction between 1,4,10,13-tetraoxa-7,16-diazacyclooctadecane, diaza-18-crown-6 (DA18C6), and 2,6-pyridinedicarboxylic acid, dipicolinic acid (pydcH 2 ). The characterization was performed using 1 H and 13 C NMR, IR spectroscopy and single crystal X-ray diffraction analysis. The asymmetric unit consists of one (DA18C6H 2 ) 2+ cation adopting a sigmoidal conformation which interacts with two (pydcH) - anions via hydrogen bonds involving the protonated amine groups of the diazacrown ether. -COOH··· - OOC- head-to-tail hydrogen bonds generate 2D undulating layers along [100] and [001] in the crystal lattice. The protonation constants of DA18C6 and pydcH 2 and equilibrium constants for the reaction of the two reactants were determined by potentiometric pH titration. The solution studies supported the formation also in solution of(DA18C6H 2 )(pydcH) 2 as the most abundant species atpH = 3.4.
Journal of Molecular Structure, 2015
h i g h l i g h t s DAPH[H 3 O][Cu(dipic)]Á3H 2 O was synthesized and characterized by UV-Vis and... more h i g h l i g h t s DAPH[H 3 O][Cu(dipic)]Á3H 2 O was synthesized and characterized by UV-Vis and IR spectroscopy. X-ray crystallography showed two molecules of o-phenylenediamine were reacted. Copper nitrate act as the oxidizing agent. Solution behavior of Cu(II) complex was studied.
Research on Chemical Intermediates, 2014
Zeitschrift für anorganische und allgemeine Chemie, 2004
A novel 1:2 proton transfer self‐associated compound LH2, (GH+)2(pydc2—), was synthesized from th... more A novel 1:2 proton transfer self‐associated compound LH2, (GH+)2(pydc2—), was synthesized from the reaction of dipicolinic acid, pydcH2, (2, 6‐pyridinedicarboxylic acid), and guanidine hydrochloride, (GH+)(Cl—). The characterization was performed using IR, 1H and 13C NMR spectroscopy and single‐crystal X‐ray diffraction. LH2 · H2O crystallizes in the space group C2/c of the monoclinic system and contains eight molecules per unit cell. The unit cell dimensions are: a = 26.480(5)Å, b = 8.055(2)Å, c = 14.068(3)Å. The first coordination complex (GH)2[Cd(pydc)2] · 2H2O, was prepared using LH2 and cadmium(II) iodide, and characterized by 1H and 13C NMR spectroscopy and X‐ray crystallography. The crystal system is triclinic with space group P1¯ with one molecule per unit cell. The unit cell dimensions are: a = 8.5125(7)Å, b = 11.0731(8)Å, c = 13.2404(10)Å. The cadmium(II) atom is six‐coordinated with a distorted octahedral geometry. The two pydc2— units are almost perpendicular to each oth...
Synthetic Communications, 2014
Zeitschrift für Kristallographie - New Crystal Structures, 2003
The reaction between LH 2 , [pyda.H 2 ][pydc], (pyda = 2,6pyridinediamine and pydc. H 2 = 2,6-pyr... more The reaction between LH 2 , [pyda.H 2 ][pydc], (pyda = 2,6pyridinediamine and pydc. H 2 = 2,6-pyridinedicarboxylic acid), ligand with palladium(II) chloride leads to the formation of [pyda.H] 2 [PdCl 4 ]. The crystal structure of the compound was determined by X-ray diffraction. The crystal system is triclinic with space group P and one molecule per unit cell. The unit cell dimensions are a = 6.900(3) Å, b = 7.898(3) Å, c = 8.025 (3) Å, with > = 103.302(14)º, @ = 104.068(14)º and A = 92.415(12)º. The final R value is 0.0602 for 1988 reflections. The presumably of the formation [pyda.H][Pd(pydc)(pydc.H)], [Pd(pydc.H) 2 ] and [pyda.H]Cl species, was studied by IR, ESI/MS, 1 H NMR, 13 C NMR spectroscopy, and elemental analysis.
Zeitschrift für Kristallographie - New Crystal Structures, 2001
Crystal Research and Technology, 2007
The different complexation methods of a proton transfer compound, (phenH) 2 (pydc) (phen=1,10phen... more The different complexation methods of a proton transfer compound, (phenH) 2 (pydc) (phen=1,10phenanthroline; pydcH 2 = pyridine-2,6-dicarboxylic acid), are discussed and the formation of [Sn(pydc)(phen)(OH) 2 ]•3H 2 O (1), {[Sb(pydc)(phen)] 2 O}•2DMSO•4H 2 O(2) and [(Tl(pydcH)] n (3) complexes are reported. The characterization was performed using IR spectroscopy and X-ray diffraction. The structures of Sn(IV) and Sb(III) complexes show that both cationic and anionic fragments of the starting proton transfer compound have been involved in the complexation. Whereas the structure of Tl(I) complex demonstrates that only the anionic fragment of (phenH) 2 (pydc) is contributed to the complexation. The complexes 1-3 show a variety of structural features including mononuclear, binuclear and polymeric structures. In compounds (1), (2) and (3) a large number of hydrogen bonds are observed. These interactions play an important role in the formation and stabilization of supramolecular systems in the crystal lattices.
Acta Crystallographica Section E Structure Reports Online, 2004
Analytical Sciences: X-ray Structure Analysis Online, 2008
Synlett, 2017
N,N-Disubstituted hydroxylamines were prepared directly from secondary amines by a reliable metho... more N,N-Disubstituted hydroxylamines were prepared directly from secondary amines by a reliable method using an oxidizing task-specific ionic liquid, choline peroxydisulfate. The operational simplicity, high selectivity, and green reaction conditions, make this method efficient and practical.
Journal of Inclusion Phenomena and Macrocyclic Chemistry, 1998
A synthetic procedure has been developed for the preparation of styrene/4'-vinyl-benzo-24-cro... more A synthetic procedure has been developed for the preparation of styrene/4'-vinyl-benzo-24-crown-8 copolymer (SPV-B24C8). The resulting copolymer was used as a membrane carrier to construct a K+ ion-selective electrode. The electrode exhibits a Nernstian response for K+ ions over a wide concentration range. The nature of the plasticizer, the additive, the concentration of internal solutions in the electrodes and the composition
Organic Process Research & Development, 2004
Production of chlorpyrifos via the phase-transfer-catalyzed reaction of O,O-diethylphosphorochlor... more Production of chlorpyrifos via the phase-transfer-catalyzed reaction of O,O-diethylphosphorochloridothioate and the sodium salt of 3,5,6-trichloropyridin-2-ol was reinvestigated. The formation of sulfotep (the major byproduct) and the yield are influenced by the nature and concentration of the ...
Journal of Solution Chemistry, 2014
The kinetics of the complexation reactions of Ba2+ and Sr2+ in AN and 95:5 wt% AN:DMF were studie... more The kinetics of the complexation reactions of Ba2+ and Sr2+ in AN and 95:5 wt% AN:DMF were studied and the kinetic parameters for the decomplexation step, Ea, ΔH#, ΔS# and ΔG#, were determined in the temperature range of 17–47 °C. Kinetic parameters reveal that both dissociative and biomolecular mechanisms contribute to the exchange of the 30C10 complexes. Furthermore, the 30C10·Ba2+ complex was synthesized and its crystal structure was determined through single crystal X-ray analysis.
Zeitschrift f�r anorganische und allgemeine Chemie, 2005
The proton transfer compound LH 2 , (phenH ϩ) 2 (pydc 2Ϫ), has been prepared from 1,10-phenanthro... more The proton transfer compound LH 2 , (phenH ϩ) 2 (pydc 2Ϫ), has been prepared from 1,10-phenanthroline, phen, and 2,6-pyridinedicarboxylic acid, (dipicolinic acid), pydcH 2. Characterization was performed using solution and solid phase CP/MAS 13 C NMR and IR spectroscopy. The reactions of this adduct with ZnSO 4 • 7H 2 O and Zn(NO 3) 2 • 4H 2 O give the complexes, [Zn(pydc) 2 ][Zn(phen) 2 (H 2 O) 2 ] • 7H 2 O (1) and [Zn(phen) 3 ] 4-(H(Hpydc) 2)(NO 3) 7 • 26H 2 O (2), respectively. These complexes were characterized by 1 H and 13 C NMR spectroscopy and single crystal X-ray analysis. The complexes crystallize in the triclinic space group P1 with Z ϭ 2. The unit cell dimensions for complex 1 and 2 are: a ϭ 9.9838(9) Å , b ϭ 14.7483(13) Å , c ϭ 14.8365(13) Å and a ϭ 12.640(4) Å , b ϭ 15.855(5) Å , c ϭ 21.830(7) Å , respectively. In complex 1 (pydc 2Ϫ) and phen, are tri-and bidentate ligands, respectively, and an anionic [Zn(pydc) 2 ] 2Ϫ and cationic [Zn(phen) 2 (H 2 O) 2 ] 2ϩ complex are formed simultaneously. In complex 2, three phen participate in complexation leaving hydrogenbis(pyridine-2-carboxylate), (H(Hpydc) 2) Ϫ as a supramolecular anion. The fragments (H(Hpydc) 2) Ϫ , 7 NO 3 Ϫ , and 26 H 2 O in com-Kristallstrukturen und Untersuchungen in Lösung von zwei neuene Zink(II)-Komplexen einer Protontransfer-Verbindung aus 2,6-Pyridindicarboxy-Säure und 1,10-Phenanthrolin ؊ Beobachtung starker intermolekularer Wasserstoffbrückenbindungen Inhaltsübersicht. Die Protontransfer-Verbindung LH 2 , (phenH ϩ) 2 (pydc 2Ϫ), wurde aus 1,10-Phenanthrolin, phen, und 2,6-Pyridindicarboxy-Säure, (Dipicolin-Säure), pydcH 2 , dargestelltund charakterisiert durch CP/MAS-13 C-NMR in Lösung und festem Zustand sowieIR-Spektroskopie. Die Reaktion dieses Addukts mit ZnSO 4 • 7H 2 O bzw. Zn(NO 3) 2 • 4H 2 O führte zu Komplexen mit der Zusammensetzung [Zn(pydc) 2 ][Zn(phen) 2 (H 2 O) 2 ] • 7H 2 O (1) und [Zn(phen) 3 ] 4 (H(Hpydc) 2)(NO 3) 7 • 26H 2 O (2), die ebenfalls mit 1 Hund 13 C-NMR spektroskopisch and durch Röntgenstrukturanalyse charakterisiert wurden. DieKomplexe kristallisieren in der triklinen Raumgruppe P1 mit Z ϭ 2. Die Gitterparameter für 1 und 2 sind: a ϭ 9.9838(9) Å , b ϭ 14.7483(13) Å , c ϭ 14.8365(13) Å bzw. a ϭ 12.640(4) Å , b ϭ 15.855(5) Å , c ϭ 21.830(7) Å. Im Komplex 1 fungieren die Eddukte (pydc 2Ϫ) und phen als drei-und zweizähnige Liganden und es wird sowohl ein [Zn(pydc) 2 ] 2Ϫ-Anion-als auch ein [Zn(phen) 2 (H 2 O) 2 ] 2ϩ-Kation-Komplex gleichzeitig gebildet. Im Fall von Komplexes 2 nehmen drei phen Moleküle an der Koordination teil und es wird ein supermolekulares Anion aus Hydrogen-160
Zeitschrift f�r anorganische und allgemeine Chemie, 2005
The 1:1 proton transfer compound LH 2, (creatH) ϩ (pydcH) Ϫ , has been prepared from the reaction... more The 1:1 proton transfer compound LH 2, (creatH) ϩ (pydcH) Ϫ , has been prepared from the reaction of creatinine, creat, and dipicolinic acid, pydcH 2 , (2,6-pyridinedicarboxylic acid) and characterized using IR, 1 H and 13 C NMR spectroscopy. The first coordination complex (creatH)[Zn(pydc)(pydcH)]•4H 2 O, was prepared using LH 2 and zinc(II) nitrate, and characterized using IR, 1 H and 13 C NMR spectroscopy and single crystal X-ray crystallography. The crystal system is triclinic with space group P 1 with two molecules per unit cell. The unit cell dimensions are a ϭ 8.085(2) Å , b ϭ 10.802(4) Å , c ϭ 13.632(4) Å , α ϭ 104.98(2)°,β ϭ 90.31(2)°a nd γ ϭ 92.55(3)°. The structure has been refined to a final value for the crystallographic R factor of 0.0381 based on 3003 reflections. The zinc atom is six-coordinated with a distorted octahedral geometry. The (pydc) 2Ϫ and (pydcH) Ϫ units are almost perpendicular to each other. Extensive hydrogen bondings between carboxyl
Zeitschrift f�r anorganische und allgemeine Chemie, 2005
Starting with a zirconium salt and LH 2 , (pydaH 2) 2ϩ (pydc) 2Ϫ , (pydaϭ2,6-pyridinediamine; pyd... more Starting with a zirconium salt and LH 2 , (pydaH 2) 2ϩ (pydc) 2Ϫ , (pydaϭ2,6-pyridinediamine; pydcH 2 ϭ2,6-pyridinedicarboxylic acid), as a 1:1 proton transfer self-associated compound, two different compounds were resulted. One of them is a new complex of Zr IV with a flat pyridine containing ligand and structure of (pydaH) 2 [Zr(pydc) 3 ] • 5H 2 O (1) and the other, (pydaH) ϩ (NO 3) Ϫ (2) is an ion pair with no zirconium ion. The zirconium(IV) complex (1) is crystallized in triclinic system with P1 space group and Zϭ2, the crystallographic parameters are: aϭ 10.612(5) Å , bϭ10.617(5) Å , cϭ16.815(8) Å , Ͱϭ103.654(9)°, βϭ