Two new second sphere coordination complexes of copper(II): Syntheses, characterization, single crystal structure and packing analyses of [trans-Cu(en) 2(H 2O) 2](L 1/L 2) 2 where L 1 = 3-methoxybenzoate, L 2 = 3,4,5-trimethoxybenzoate (original) (raw)
Related papers
Second sphere coordination complexes: Synthesis, characterization, single crystal structure and packing analyses of trans-Cu(en)2(H2O)22 where L1=p-toluenesulphonate, L2=5-bromo-2-methoxybenzenesulphonate
Journal of Molecular Structure, 2010
Two new copper(II) complexes of composition [trans-Cu(en) 2 (H 2 O) 2 ](L 1 ) 2 , 1 and [trans-Cu(en) 2 (H 2 O) 2 ](L 2 ) 2 , 2 (L 1 = p-toluenesulphonate, L 2 = 5-bromo-2-methoxybenzenesulphonate) were obtained by the addition of ethylenediamine to hydrated Cu(II) sulphonates, Cu(L 1 /L 2 ) 2 ÁnH 2 O in methanol-water solution. The newly synthesized complex salts have been characterized by elemental analyses, TGA, spectroscopic techniques (electronic and FT-IR), magnetic moment determination and conductance measurements. The complex salt 1 crystallizes in the monoclinic system with space group P2 1 /c and complex salt 2 crystallizes in the triclinic system with space group P 1. X-ray structure determination revealed ionic structures consisting of one complex cation [Cu(en) 2 (H 2 O) 2 ] 2+ and two respective sulphonate anions in 1 and 2. A three dimensional hydrogen bonding network formed by N-H. . .O, C-H. . .O and O-H. . .O through second sphere interactions besides electrostatic forces of attraction stabilize crystal lattice in both complex salts.
Polyhedron, 2013
In order to investigate the influence of intermolecular hydrogen bonds and the co-ligands [WS 4 ] 2À and Imt on the structures of copper complexes, two new compounds, [WS 4 Cu 3 I(tdmpp)] 4 Á2CH 3 CN (1) and [CuCl(Imt)Á0.5tdmpp] 2 Á2(CH 3) 2 CO (2), have been synthesized in one pot reactions. The reaction of CuI and (NH 4) 2 WS 4 with tdmpp (1,1,3,3-tetrakis(3,5-dimethyl-1-pyrazole)propane) (molar ratio = 3:1:1) in DMF/CH 3 CN (1:4; v/v) led to the formation of complex 1, while treatment of Imt (imidazolidine-2-thione) and CuCl with tdmpp (molar ratio = 2:2:1) in acetone formed complex 2. These complexes have been structurally characterized by X-ray crystallography, infrared spectroscopy and elemental analyses. Thermal analysis and UV-Vis spectroscopic analysis of complex 1 have also been undertaken. Complex 1 has a tetrameric structure which forms intermolecular C-HÁ Á ÁS and C-HÁ Á ÁI hydrogen bonds, resulting in a 2D polymeric structure. In this complex, the copper(I) atoms have two different geometries: trigonal planar (CuS 2 I) and distorted tetrahedral (CuS 2 N 2). In contrast, complex 2 has a dimeric structure in which the copper atoms are four-coordinate with a distorted tetrahedral CuN 2 SCl geometry. The dimeric molecules link to the oxygen atoms of uncoordinated acetone molecules through N-HÁ Á ÁO hydrogen bonds.
Synthesis, characterization, single crystal X-ray structural studies and packing analyses of two novel copper(II) complexes: [Cu(2Cl5FC7H3O2)2(beta-picoline)2(H2O)2] and Cu(en)2(H2O)22
Journal of Molecular Structure, 2011
Two novel copper(II) complexes, H 3 O 2 ) 2 (b-pic) 2 (H 2 O) 2 ] 1 and [Cu(en) 2 (H 2 O) 2 ] (2-Cl-5-F-C 7 H 3 O 2 ) 2 2 (where b-pic = b-picoline, en = ethylenediamine) were isolated by addition of b-picoline and ethylenediamine respectively to the hydrated copper(II) aryl carboxylate, Cu(2-Cl-5-F-C 7 H 3 O 2 ) 2 suspended in water-methanol (1:4) mixture. The newly isolated complexes have been characterized by elemental analyses, TGA, spectroscopic techniques (EPR, IR and UV/Vis), conductance, magnetic susceptibility studies and single crystal X-ray structure determination. Single crystal X-ray structure determinations revealed the presence of covalently bonded 2-Chloro-5-fluorobenzoate groups in the complex, viz: [Cu(2-Cl-5-FC 7 H 3 O 2 ) 2 (b-picoline) 2 (H 2 O) 2 ] 1 and ionic 2-Chloro-5-fluorobenzoate groups in [Cu(en) 2 (H 2 O) 2 ] (2-Cl-5-FC 7 H 3 O 2 ) 2 in 2. In 1, two b-picoline, two unidentate carboxylate groups and two water molecules are coordinated to copper(II) ion. In 2, two ethylenediamine molecules (4 N) and two oxygen from water molecules are coordinated to copper(II) ion. Hexacoordination around copper(II) is achieved with distorted octahedral geometry in both the cases. The crystal network in complex 1 is stabilized by O-HÁ Á ÁO, C-HÁ Á Áp, ClÁ Á ÁF, and ClÁ Á ÁH-C and in complex 2 cationic and anionic layers are held together by the N-HÁ Á ÁO, O-HÁ Á ÁO, C-HÁ Á ÁF, C-HÁ Á ÁO interactions.
New Comprehensive Biochemistry, 2011
Two novel copper(II) complexes, H 3 O 2 ) 2 (b-pic) 2 (H 2 O) 2 ] 1 and [Cu(en) 2 (H 2 O) 2 ] (2-Cl-5-F-C 7 H 3 O 2 ) 2 2 (where b-pic = b-picoline, en = ethylenediamine) were isolated by addition of b-picoline and ethylenediamine respectively to the hydrated copper(II) aryl carboxylate, Cu(2-Cl-5-F-C 7 H 3 O 2 ) 2 suspended in water-methanol (1:4) mixture. The newly isolated complexes have been characterized by elemental analyses, TGA, spectroscopic techniques (EPR, IR and UV/Vis), conductance, magnetic susceptibility studies and single crystal X-ray structure determination. Single crystal X-ray structure determinations revealed the presence of covalently bonded 2-Chloro-5-fluorobenzoate groups in the complex, viz: [Cu(2-Cl-5-FC 7 H 3 O 2 ) 2 (b-picoline) 2 (H 2 O) 2 ] 1 and ionic 2-Chloro-5-fluorobenzoate groups in [Cu(en) 2 (H 2 O) 2 ] (2-Cl-5-FC 7 H 3 O 2 ) 2 in 2. In 1, two b-picoline, two unidentate carboxylate groups and two water molecules are coordinated to copper(II) ion. In 2, two ethylenediamine molecules (4 N) and two oxygen from water molecules are coordinated to copper(II) ion. Hexacoordination around copper(II) is achieved with distorted octahedral geometry in both the cases. The crystal network in complex 1 is stabilized by O-HÁ Á ÁO, C-HÁ Á Áp, ClÁ Á ÁF, and ClÁ Á ÁH-C and in complex 2 cationic and anionic layers are held together by the N-HÁ Á ÁO, O-HÁ Á ÁO, C-HÁ Á ÁF, C-HÁ Á ÁO interactions.
Crystals
Two new complexes, [Cu(dimpyr)2(H2O)2](NO3)2.2H2O (1) and (Hamdimpy)2[CoCl4].H2O (2), with the monodentate ligand 2-amino-6-methylpyrimidin-4-(1H)-one (dimpyr) and the countercation 4-amino-2,6-dimetylpyrimidium (Hamdimpy), respectively, were prepared and characterized by single crystal X-ray diffraction, elemental analysis and IR spectroscopy. In (1), the Cu(II) cation is tetracoordinated, in a square plan fashion, by two nitrogen atoms from the pyrimidine ring of the organic ligand and two oxygen atoms of two coordinated water molecules. In the atomic arrangement, the CuO2N2 square planes are interconnected via the formation of O-H…O hydrogen bonds involving both coordinated and free water molecules and NO3− nitrate anions to form inorganic layers parallel to the (a, b) plane at z = (2n + 1)/4. In (2), the central atom Co(II) is four-coordinated in a distorted tetrahedral fashion by four Cl− ions. The [CoCl4]2− tetrahedra are arranged parallel to the plane (1¯10) at x = (2n + 1)/2...
Copper(II) complexes with (2-hydroxybenzyl-2-pyridylmethyl)amine–Hbpa: syntheses, characterization and crystal structures of the ligand and Cu(II)(Hbpa)22·2H2O
Inorganica Chimica Acta, 1999
Copper(II) complexes were synthesized and characterized by means of elemental analysis, IR and visible spectroscopies, EPR and electrochemistry, as well as X-ray structure crystallography. The group consists of discrete mononuclear units with the general formula [Cu(II)(Hbpa) 2 ](A) 2 ·nH 2 O, where Hbpa =(2-hydroxybenzyl-2-pyridylmethyl)amine and A = ClO 4 − , n= 2 (1), CH 3 COO − , n= 3 (2), NO 3 − , n=2 (3) and SO 4 2 − , n =3 (4). The structures of the ligand Hbpa and complex 1 have been determined by X-ray crystallography. Complexes 1-4 have had their UV -Vis spectra measured in both MeCN and DMF. It was observed that the compounds interact with basic solvents, such that molecules coordinate to the metal in axial positions in which phenol oxygen atoms are coordinated in the protonated forms. The m values were all less than 1000 M − 1 cm − 1 . EPR measurements on powdered samples of 1-3 gave g /A values between 105 and 135 cm − 1 , typical for square planar coordination environments. Complex 4·3H 2 O exhibits a behaviour typical for tetrahedral coordination. The electrochemical behaviour for complexes 1 and 2 was studied showing irreversible redox waves for both compounds.
Synthesis and Characterization of Some New Binary and Ternary CuII Complexes
Synthesis and Reactivity …, 2011
New types of binary and ternary Cu II complexes have been synthesized and characterized by elemental analyses, molar conductivities, spectral (i.r., u.v.-vis., e.s.r., mass), magnetic and thermal measurements. The binary Cu II complexes are synthesized by the reaction of 2,2'-dipyridyl (dipy), thiosalicylic acid (tsa),
Acta crystallographica. Section C, Crystal structure communications, 2013
Two copper complex solvatomorphs, namely (3,10-C-meso-3,5,7,7,10,12,14,14-octamethyl-1,4,8,11-tetraazacyclotetradecane)bis(perchlorato-κO)copper(II) 1.2-hydrate, [Cu(ClO4)2(C18H40N4)]·1.2H2O, (I), and (3,10-C-meso-3,5,7,7,10,12,14,14-octamethyl-1,4,8,11-tetraazacyclotetradecane)bis(perchlorato-κO)copper(II), [Cu(ClO4)2(C18H40N4)], (II), are described and compared with each other and with a third, already reported, anhydrous diastereomer, denoted (III). Both compounds present very similar centrosymmetic coordination environments, with the Cu(II) cation lying on an inversion centre in a distorted 4+2 octahedral environment, defined by the macrocyclic N4 group in the equatorial sites and two perchlorate groups in trans-axial positions [one of the perchlorate ligands in (I) is partially disordered]. The most significant difference in molecular shape is seen in the orientation of the perchlorate anions, and the influence of this on the intramolecular hydrogen bonding is discussed. The (p...