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Bis (3-hydroximinobut-2-one thiosemicarbazone) nickel(II), C 10 H 22 Cl 2 N 8 NiO 3 S 2 , exhibits a considerably distorted octahedral NiN 4 S 2  core with two tridentate ligands approximately oriented along their respective meridional planes, forming two fused five - membered rings while binding the Ni 2+  ion. The complex crystallised as the monohydrate of its chloride, space group P2 1 /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 - crystalline materials

Bis (3-hydroximinobut-2-one thiosemicarbazone) nickel(II) chloride monohydrate – a complex with NiN 4 S 2  chromophore: a crystallographic evidence of packing stabilisation by two kinds of four fold H-bonded chloride ions