Abstract
The reaction of 2,5-bis-(pyridin-4-yl)-1,3,4-oxa-diazole (4-pox) and thio-cyanate ions, used as co-ligand with nickel salt NiCl2·6H2O, produced the title complex, [Ni(NCS)2(C12H8N4O)2(H2O)2]. The NiII atom is located on an inversion centre and is octa-hedrally coordinated by four N atoms from two ligands and two pseudohalide ions, forming the equatorial plane. The axial positions are occupied by two O atoms of coordinated water mol-ecules. In the crystal, the mol-ecules are linked into a three-dimensional network through strong O-H⋯N hydrogen bonds. Hirshfeld surface analysis was used to investigate the inter-molecular inter-actions in the crystal packing.
Highlights
The reaction of 2,5-bis(pyridin-4-yl)-1,3,4-oxadiazole (4-pox) and thiocyanate ions, used as co-ligand with nickel salt NiCl2Á6H2O, produced the title complex, [Ni(NCS)2(C12H8N4O)2(H2O)2]
The molecules are linked into a three-dimensional network through strong O— HÁ Á ÁN hydrogen bonds
With the thiocyanate ion (SCNÀ), mononuclear complexes of formula [M(4-pox)2(NCS)2(H2O)2] have been synthesized; they exhibit an octahedral geometry around the metal site with pseudohalide and organic ligands in mutually trans positions (Du et al, 2002b, Fang et al, 2002; Du & Zhao, 2004)
Summary
Bi- or multidentate bridging heterocyclic ligands, in particular thiadiazole and oxadiazole derivatives, have been used to bind metal ions, generating mono- (Guo et al, 2003), bi(Mahmoudi & Morsali, 2007) or multidimensional (Du et al, 2004a; Du et al, 2010; Li et al, 2010a) coordination complexes as well as metal–organic framework (MOF) type coordination polymers with potentially interesting magnetic (Li et al, 2010b; Laachir et al, 2016; Liu et al, 2003) and biological (Zine et al, 2017; Smaili et al, 2017; Baba Ahmed et al, 2015; Barboiu et al, 1996) properties. Symmetry codes: (i) Àx þ 1; y À 12; Àz þ 32; (ii) x; y; z À 1
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