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A. Kumar Das, S. Seth, S. Kumar Chattopadhyay

Bis (3-hydroximinobut-2-one thiosemicarbazone) nickel(II) chloride monohydrate – a complex with NiN₄S₂ chromophore: a crystallographic evidence of packing stabilisation by two kinds of four fold H-bonded chloride ions

Bis (3-hydroximinobut-2-one thiosemicarbazone) nickel(II), C₁₀H₂₂Cl₂N₈NiO₃S₂, exhibits a considerably distorted octahedral NiN₄S₂ core with two tridentate ligands approximately oriented along their respective meridional planes, forming two fused five - membered rings while binding the Ni²⁺ ion. The complex crystallised as the monohydrate of its chloride, space group P2₁/a Z = 4, a = 15.907(3)Å, b = 7.135(2)Å, c = 19.380(3)Å, β= 102.55(2)0. The only intramolecular association in the structure constitutes an interligand oximino proton – oximino nitrogen interaction. Water molecules and chloride anions are found to occupy lattice cavities. The protons attached to the water molecules and the primary amine groups display bifurcated H-bonding interactions. The chloride ions are interactionally tetracoordinated, forming two kinds of extremely distorted H-bonding systems, one pyramidal and the other tetrahedral. Thus, the molecular packing is stabilised by a complicated interactional network.

Zeitschrift für Kristallographie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0044-2968
Volume: 215, 08/2000
Pages: 481

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