Shahzad Sharif - Academia.edu (original) (raw)
Papers by Shahzad Sharif
![Research paper thumbnail of Synthesis and structural characterization of cadmium(II) complexes of tetramethylthiourea (Tmtu); X-ray structure of [Cd(Tmtu)2Cl2]](https://attachments.academia-assets.com/46532223/thumbnails/1.jpg)
](Russian Journal of Coordination Chemistry
Two mercury(II) cyanide complexes of N-ethylthiourea (Ettu) and N-propylthiourea (Prtu) ligands, ... more Two mercury(II) cyanide complexes of N-ethylthiourea (Ettu) and N-propylthiourea (Prtu) ligands, [Hg(Ettu) 2 (CN) 2 ] (1) and [Hg(Prtu) 2 (CN) 2 ] (2), were prepared and their crystal structures were determined by X-ray crystallography. In both structures, the mercury atom is coordinated to two sulfur atoms of thioureas and two cyanide carbon atoms in a pseudo-tetrahedral mode with the bond angles in the range of 90.52(11)-162.2(3)°. The structures are stabilized by N-H---S, N-H---N, and C-H---N intramolecular and intermolecular hydrogen bonds. Crystallographic reports about mercury(II) complexes containing thioamides establish that these ligands are coordinated via the sulfur atom [1-26]. The crystal structures of the 1:2 complexes usually consist of discrete monomeric molecules [1-20], while those of 1:1 often involve dimeric species [20-26]. However, in both types of complexes, mercury(II) exhibits a tetrahedral or pseudo-tetrahedral coordination environment. We have recently reported the crystal structures of Hg(CN) 2 complexes of methylthiourea (Metu) [7], N,N′-diethylthiourea (Dintu) [8], N,N′-dibutylthiourea (Dbtu) [9], and tetramethylthiourea (Tmtu) [27]. Although the structures of other thiourea complexes are usually of the type L 2 HgX 2 [7-9], the Tmtu complex, [{(tetramethylthiourea) 2 Hg(CN) 2 } 2 ⋅Hg(CN) 2 ] is trinuclear consisting of two independent [(Tmtu) 2 Hg(CN) 2 ] moieties bridged by a Hg(CN) 2 unit [27]. In order to investigate further about the structures of mercury cyanide complexes, we report here the crystal structures of two monomeric Hg(CN) 2 complexes: bis(cyanido)bis(Nethylthiourea-κS)mercury(II), [Hg(Ettu) 2 (CN) 2 ] (1) and bis(cyanido)bis(N-propylthiourea-κS)mercury(II), [Hg(Prtu) 2 (CN) 2 ]
Acta crystallographica. Section E, Structure reports online, 2009
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.046; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.046; wR factor = 0.145; data-to-parameter ratio = 19.1.
![Research paper thumbnail of N -[4-( N -Cyclohexylsulfamoyl)phenyl]acetamide](https://attachments.academia-assets.com/46532283/thumbnails/1.jpg)
](Acta Crystallographica Section E-structure Reports Online, 2010
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.007 Å; R factor = 0.062; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.007 Å; R factor = 0.062; wR factor = 0.218; data-to-parameter ratio = 19.9.
Acta Crystallographica Section E-structure Reports Online, 2010
Acta Crystallographica Section E-structure Reports Online, 2009
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.004 Å; R factor = 0.042; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.004 Å; R factor = 0.042; wR factor = 0.099; data-to-parameter ratio = 17.0.
Journal of Coordination Chemistry, 2013
ABSTRACT Two new 3-D Ce(III) coordination polymers, [Ce1.3(PTA)2(Oxa)2(Gly)(H2O)2]·(Gly)4H2O (1) ... more ABSTRACT Two new 3-D Ce(III) coordination polymers, [Ce1.3(PTA)2(Oxa)2(Gly)(H2O)2]·(Gly)4H2O (1) and [Ce2.6(PTA)4(Oxa)2(H2O)10]·(MeOH)7H2O (2) (PTA = 2,4,6-pyridinetricarboxylate, oxa = oxalate and Gly = glycine), were synthesized. The oxalate in 1 and 2, generated in situ from the cleavage and chemical rearrangement of PTAH3, assembled into mixed-ligand networks to generate 3-D frameworks. Single crystal analysis reveals that in both complexes, Ce(III) shows coordination numbers of 7 and 10 in 1 and 8 and 10 in 2. PTA adopts four kinds of coordination modes. These complexes were further characterized using elemental analysis, FTIR spectroscopy and thermogravimetric analysis.
![Research paper thumbnail of Crystal structures of [Hg (N-ethylthiourea) 2 (CN) 2] and [Hg (N-propylthiourea) 2 (CN) 2]](https://attachments.academia-assets.com/46532225/thumbnails/1.jpg)
](Two mercury(II) cyanide complexes of N-ethylthiourea (Ettu) and N-propylthiourea (Prtu) ligands, ... more Two mercury(II) cyanide complexes of N-ethylthiourea (Ettu) and N-propylthiourea (Prtu) ligands, [Hg(Ettu) 2 (CN) 2 ] (1) and [Hg(Prtu) 2 (CN) 2 ] (2), were prepared and their crystal structures were determined by X-ray crystallography. In both structures, the mercury atom is coordinated to two sulfur atoms of thioureas and two cyanide carbon atoms in a pseudo-tetrahedral mode with the bond angles in the range of 90.52(11)-162.2(3)°. The structures are stabilized by N-H---S, N-H---N, and C-H---N intramolecular and intermolecular hydrogen bonds. Crystallographic reports about mercury(II) complexes containing thioamides establish that these ligands are coordinated via the sulfur atom [1-26]. The crystal structures of the 1:2 complexes usually consist of discrete monomeric molecules [1-20], while those of 1:1 often involve dimeric species [20-26]. However, in both types of complexes, mercury(II) exhibits a tetrahedral or pseudo-tetrahedral coordination environment. We have recently reported the crystal structures of Hg(CN) 2 complexes of methylthiourea (Metu) [7], N,N′-diethylthiourea (Dintu) [8], N,N′-dibutylthiourea (Dbtu) [9], and tetramethylthiourea (Tmtu) [27]. Although the structures of other thiourea complexes are usually of the type L 2 HgX 2 [7-9], the Tmtu complex, [{(tetramethylthiourea) 2 Hg(CN) 2 } 2 ⋅Hg(CN) 2 ] is trinuclear consisting of two independent [(Tmtu) 2 Hg(CN) 2 ] moieties bridged by a Hg(CN) 2 unit [27]. In order to investigate further about the structures of mercury cyanide complexes, we report here the crystal structures of two monomeric Hg(CN) 2 complexes: bis(cyanido)bis(Nethylthiourea-κS)mercury(II), [Hg(Ettu) 2 (CN) 2 ] (1) and bis(cyanido)bis(N-propylthiourea-κS)mercury(II), [Hg(Prtu) 2 (CN) 2 ]
Lanthanum(III) and cerium(III) complexes of pyridine-2,6-dicaboxylic acid (H 2 Pydc) have been pr... more Lanthanum(III) and cerium(III) complexes of pyridine-2,6-dicaboxylic acid (H 2 Pydc) have been prepared and their crystal structures were determined by X-ray crystallography. The single crystal analysis reveals that the lanthanum(III) complex, 1 is polymeric consisting of {[La(Pydc) 2 (H 2 O) 2 ]Á4H 2 O} n units linked through carboxylate oxygen atoms and exhibiting nine coordination number. Intermolecular O-HÁÁÁO hydrogen bonds produce R 1 1 (6), R 4 4 (16) and R 4 4 (20) rings, which lead to threedimensional polymeric chains. The crystal structure of the cerium(III) complex, 2 [{Ce(Pydc) 3 }{Ce(Pydc)(HO-CH 2 CH 2 -OH)(H 2 O) 3 }Á6H 2 O)] shows that the complex is a mixed-ligand binuclear system in which one cerium coordinated to three Pydc molecules, while the other cerium is bound to one Pydc, one oxygen atom of the other Pydc, one ethylene glycol and three water molecules. Each of the two Ce(III) ions is nine coordinated. Intermolecular O-HÁÁÁO hydrogen bonds produce R 2 2 (8) and R 2 2 (20) rings, which lead to three-dimensional polymeric chains. The complexes were further investigated using elemental analysis, FTIR spectroscopy and thermogravimetric analysis.
Analytica Chimica Acta, 2004
Acta Crystallographica Section E Structure Reports Online, 2012
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.053; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.053; wR factor = 0.150; data-to-parameter ratio = 21.4.
Acta Crystallographica Section E Structure Reports Online, 2013
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.002 Å; R factor = 0.037; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.002 Å; R factor = 0.037; wR factor = 0.101; data-to-parameter ratio = 14.0.
Acta Crystallographica Section E Structure Reports Online, 2009
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.046; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.046; wR factor = 0.145; data-to-parameter ratio = 19.1.
![Research paper thumbnail of 7-Benzenesulfonamido-3-ethenyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid methanol solvate](https://attachments.academia-assets.com/46532228/thumbnails/1.jpg)
](Acta Crystallographica Section E Structure Reports Online, 2009
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.008 Å; R factor = 0.051; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.008 Å; R factor = 0.051; wR factor = 0.120; data-to-parameter ratio = 16.2.
Acta Crystallographica Section E Structure Reports Online, 2009
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.048; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.048; wR factor = 0.128; data-to-parameter ratio = 18.4.
Acta Crystallographica Section E Structure Reports Online, 2011
In the title compound, C(13)H(11)Cl(2)NO(3)S, the dihedral angle between the benzene rings is 74.... more In the title compound, C(13)H(11)Cl(2)NO(3)S, the dihedral angle between the benzene rings is 74.37 (3)°. In the crystal, inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into chains along the b axis.
Inorganic Chemistry Communications, 2011
a b s t r a c t Platinum(II) complexes, [Pt(PDTC)(H 2 O)Cl] and [Pt(PDTC)(DMSO)Cl]
Acta Crystallographica Section E Structure Reports Online, 2010
Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.013 Å; R factor = 0.062; wR... more Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.013 Å; R factor = 0.062; wR factor = 0.232; data-to-parameter ratio = 14.3.
![Research paper thumbnail of Bis(1,3-benzothiazole-2-thiolato)[( Z )-methyl 2-(2-amino-1,3-thiazol-4-yl)-2-(methoxyimino)acetate]nickel(II)](https://attachments.academia-assets.com/46532244/thumbnails/1.jpg)
](Acta Crystallographica Section E Structure Reports Online, 2010
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.006 Å; R factor = 0.043; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.006 Å; R factor = 0.043; wR factor = 0.131; data-to-parameter ratio = 19.0.
Acta Crystallographica Section E Structure Reports Online, 2010
In the mol-ecule of the title compound, C(15)H(15)NO(2)S, the dihedral angle between the two phen... more In the mol-ecule of the title compound, C(15)H(15)NO(2)S, the dihedral angle between the two phenyl rings is 41.8 (3)°. The S atom has a distorted tetra-hedral environment. In the crystal structure, C-H⋯O hydrogen bonds link the molecules into a ribbon-like structure along [010].
Russian Journal of Coordination Chemistry
Two mercury(II) cyanide complexes of N-ethylthiourea (Ettu) and N-propylthiourea (Prtu) ligands, ... more Two mercury(II) cyanide complexes of N-ethylthiourea (Ettu) and N-propylthiourea (Prtu) ligands, [Hg(Ettu) 2 (CN) 2 ] (1) and [Hg(Prtu) 2 (CN) 2 ] (2), were prepared and their crystal structures were determined by X-ray crystallography. In both structures, the mercury atom is coordinated to two sulfur atoms of thioureas and two cyanide carbon atoms in a pseudo-tetrahedral mode with the bond angles in the range of 90.52(11)-162.2(3)°. The structures are stabilized by N-H---S, N-H---N, and C-H---N intramolecular and intermolecular hydrogen bonds. Crystallographic reports about mercury(II) complexes containing thioamides establish that these ligands are coordinated via the sulfur atom [1-26]. The crystal structures of the 1:2 complexes usually consist of discrete monomeric molecules [1-20], while those of 1:1 often involve dimeric species [20-26]. However, in both types of complexes, mercury(II) exhibits a tetrahedral or pseudo-tetrahedral coordination environment. We have recently reported the crystal structures of Hg(CN) 2 complexes of methylthiourea (Metu) [7], N,N′-diethylthiourea (Dintu) [8], N,N′-dibutylthiourea (Dbtu) [9], and tetramethylthiourea (Tmtu) [27]. Although the structures of other thiourea complexes are usually of the type L 2 HgX 2 [7-9], the Tmtu complex, [{(tetramethylthiourea) 2 Hg(CN) 2 } 2 ⋅Hg(CN) 2 ] is trinuclear consisting of two independent [(Tmtu) 2 Hg(CN) 2 ] moieties bridged by a Hg(CN) 2 unit [27]. In order to investigate further about the structures of mercury cyanide complexes, we report here the crystal structures of two monomeric Hg(CN) 2 complexes: bis(cyanido)bis(Nethylthiourea-κS)mercury(II), [Hg(Ettu) 2 (CN) 2 ] (1) and bis(cyanido)bis(N-propylthiourea-κS)mercury(II), [Hg(Prtu) 2 (CN) 2 ]
Acta crystallographica. Section E, Structure reports online, 2009
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.046; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.046; wR factor = 0.145; data-to-parameter ratio = 19.1.
Acta Crystallographica Section E-structure Reports Online, 2010
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.007 Å; R factor = 0.062; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.007 Å; R factor = 0.062; wR factor = 0.218; data-to-parameter ratio = 19.9.
Acta Crystallographica Section E-structure Reports Online, 2010
Acta Crystallographica Section E-structure Reports Online, 2009
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.004 Å; R factor = 0.042; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.004 Å; R factor = 0.042; wR factor = 0.099; data-to-parameter ratio = 17.0.
Journal of Coordination Chemistry, 2013
ABSTRACT Two new 3-D Ce(III) coordination polymers, [Ce1.3(PTA)2(Oxa)2(Gly)(H2O)2]·(Gly)4H2O (1) ... more ABSTRACT Two new 3-D Ce(III) coordination polymers, [Ce1.3(PTA)2(Oxa)2(Gly)(H2O)2]·(Gly)4H2O (1) and [Ce2.6(PTA)4(Oxa)2(H2O)10]·(MeOH)7H2O (2) (PTA = 2,4,6-pyridinetricarboxylate, oxa = oxalate and Gly = glycine), were synthesized. The oxalate in 1 and 2, generated in situ from the cleavage and chemical rearrangement of PTAH3, assembled into mixed-ligand networks to generate 3-D frameworks. Single crystal analysis reveals that in both complexes, Ce(III) shows coordination numbers of 7 and 10 in 1 and 8 and 10 in 2. PTA adopts four kinds of coordination modes. These complexes were further characterized using elemental analysis, FTIR spectroscopy and thermogravimetric analysis.
Two mercury(II) cyanide complexes of N-ethylthiourea (Ettu) and N-propylthiourea (Prtu) ligands, ... more Two mercury(II) cyanide complexes of N-ethylthiourea (Ettu) and N-propylthiourea (Prtu) ligands, [Hg(Ettu) 2 (CN) 2 ] (1) and [Hg(Prtu) 2 (CN) 2 ] (2), were prepared and their crystal structures were determined by X-ray crystallography. In both structures, the mercury atom is coordinated to two sulfur atoms of thioureas and two cyanide carbon atoms in a pseudo-tetrahedral mode with the bond angles in the range of 90.52(11)-162.2(3)°. The structures are stabilized by N-H---S, N-H---N, and C-H---N intramolecular and intermolecular hydrogen bonds. Crystallographic reports about mercury(II) complexes containing thioamides establish that these ligands are coordinated via the sulfur atom [1-26]. The crystal structures of the 1:2 complexes usually consist of discrete monomeric molecules [1-20], while those of 1:1 often involve dimeric species [20-26]. However, in both types of complexes, mercury(II) exhibits a tetrahedral or pseudo-tetrahedral coordination environment. We have recently reported the crystal structures of Hg(CN) 2 complexes of methylthiourea (Metu) [7], N,N′-diethylthiourea (Dintu) [8], N,N′-dibutylthiourea (Dbtu) [9], and tetramethylthiourea (Tmtu) [27]. Although the structures of other thiourea complexes are usually of the type L 2 HgX 2 [7-9], the Tmtu complex, [{(tetramethylthiourea) 2 Hg(CN) 2 } 2 ⋅Hg(CN) 2 ] is trinuclear consisting of two independent [(Tmtu) 2 Hg(CN) 2 ] moieties bridged by a Hg(CN) 2 unit [27]. In order to investigate further about the structures of mercury cyanide complexes, we report here the crystal structures of two monomeric Hg(CN) 2 complexes: bis(cyanido)bis(Nethylthiourea-κS)mercury(II), [Hg(Ettu) 2 (CN) 2 ] (1) and bis(cyanido)bis(N-propylthiourea-κS)mercury(II), [Hg(Prtu) 2 (CN) 2 ]
Lanthanum(III) and cerium(III) complexes of pyridine-2,6-dicaboxylic acid (H 2 Pydc) have been pr... more Lanthanum(III) and cerium(III) complexes of pyridine-2,6-dicaboxylic acid (H 2 Pydc) have been prepared and their crystal structures were determined by X-ray crystallography. The single crystal analysis reveals that the lanthanum(III) complex, 1 is polymeric consisting of {[La(Pydc) 2 (H 2 O) 2 ]Á4H 2 O} n units linked through carboxylate oxygen atoms and exhibiting nine coordination number. Intermolecular O-HÁÁÁO hydrogen bonds produce R 1 1 (6), R 4 4 (16) and R 4 4 (20) rings, which lead to threedimensional polymeric chains. The crystal structure of the cerium(III) complex, 2 [{Ce(Pydc) 3 }{Ce(Pydc)(HO-CH 2 CH 2 -OH)(H 2 O) 3 }Á6H 2 O)] shows that the complex is a mixed-ligand binuclear system in which one cerium coordinated to three Pydc molecules, while the other cerium is bound to one Pydc, one oxygen atom of the other Pydc, one ethylene glycol and three water molecules. Each of the two Ce(III) ions is nine coordinated. Intermolecular O-HÁÁÁO hydrogen bonds produce R 2 2 (8) and R 2 2 (20) rings, which lead to three-dimensional polymeric chains. The complexes were further investigated using elemental analysis, FTIR spectroscopy and thermogravimetric analysis.
Analytica Chimica Acta, 2004
Acta Crystallographica Section E Structure Reports Online, 2012
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.053; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.053; wR factor = 0.150; data-to-parameter ratio = 21.4.
Acta Crystallographica Section E Structure Reports Online, 2013
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.002 Å; R factor = 0.037; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.002 Å; R factor = 0.037; wR factor = 0.101; data-to-parameter ratio = 14.0.
Acta Crystallographica Section E Structure Reports Online, 2009
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.046; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.046; wR factor = 0.145; data-to-parameter ratio = 19.1.
Acta Crystallographica Section E Structure Reports Online, 2009
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.008 Å; R factor = 0.051; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.008 Å; R factor = 0.051; wR factor = 0.120; data-to-parameter ratio = 16.2.
Acta Crystallographica Section E Structure Reports Online, 2009
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.048; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.005 Å; R factor = 0.048; wR factor = 0.128; data-to-parameter ratio = 18.4.
Acta Crystallographica Section E Structure Reports Online, 2011
In the title compound, C(13)H(11)Cl(2)NO(3)S, the dihedral angle between the benzene rings is 74.... more In the title compound, C(13)H(11)Cl(2)NO(3)S, the dihedral angle between the benzene rings is 74.37 (3)°. In the crystal, inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into chains along the b axis.
Inorganic Chemistry Communications, 2011
a b s t r a c t Platinum(II) complexes, [Pt(PDTC)(H 2 O)Cl] and [Pt(PDTC)(DMSO)Cl]
Acta Crystallographica Section E Structure Reports Online, 2010
Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.013 Å; R factor = 0.062; wR... more Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.013 Å; R factor = 0.062; wR factor = 0.232; data-to-parameter ratio = 14.3.
Acta Crystallographica Section E Structure Reports Online, 2010
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.006 Å; R factor = 0.043; wR... more Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.006 Å; R factor = 0.043; wR factor = 0.131; data-to-parameter ratio = 19.0.
Acta Crystallographica Section E Structure Reports Online, 2010
In the mol-ecule of the title compound, C(15)H(15)NO(2)S, the dihedral angle between the two phen... more In the mol-ecule of the title compound, C(15)H(15)NO(2)S, the dihedral angle between the two phenyl rings is 41.8 (3)°. The S atom has a distorted tetra-hedral environment. In the crystal structure, C-H⋯O hydrogen bonds link the molecules into a ribbon-like structure along [010].