Abstract
The mononuclear title complex, [Cu(SCN)2(C12H8N4S)2], was obtained by the reaction of 2,5-bis-(pyridin-2-yl)-1,3,4-thia-diazole and potassium thio-cyanate with copper(II) chloride dihydrate. The copper cation lies on an inversion centre and displays an elongated octa-hedral coordination geometry. The equatorial positions are occupied by the N atoms of two 2,5-bis-(pyridin-2-yl)-1,3,4-thia-diazole ligands, whereas the axial positions are occupied by the S atoms of two thio-cyanate anions. The thia-diazole and the pyridyl rings linked to the metal are approximately coplanar, with a maximum deviation from the mean plane of 0.190 (2) Å. The cohesion of the crystal structure is ensured by weak C-H⋯N hydrogen bonds and π-π inter-actions between parallel pyridyl rings of neighbouring mol-ecules [centroid-to-centroid distance = 3.663 (2) Å], leading to a three-dimensional network.
Highlights
The mononuclear title complex, [Cu(SCN)2(C12H8N4S)2], was obtained by the reaction of 2,5-bis(pyridin-2-yl)-1,3,4-thiadiazole and potassium thiocyanate with copper(II) chloride dihydrate
The copper cation lies on an inversion centre and displays an elongated octahedral coordination geometry
The equatorial positions are occupied by the N atoms of two 2,5-bis(pyridin-2-yl)1,3,4-thiadiazole ligands, whereas the axial positions are occupied by the S atoms of two thiocyanate anions
Summary
The use of compounds containing a 1,3,4-thiadiazole moiety as part of ligand systems has gained considerable attention in recent years (Kadam Sushama et al, 2016). An interesting feature of the metal-ligand chemistry of these compounds is that the complexes can be mononuclear (Bentiss et al, 2011, 2012; Klingele et al, 2010; Kaase & Klingele, 2014) or binuclear (Laachir et al, 2013). We have recently reported the synthesis and characterization of monomeric complexes of NiII and CoII with bptd in the presence of the pseudohalide azide (Laachir et al, 2015a,b). In this context, we report here the synthesis and crystal structure of a new CuII complex with bptd and thiocyanate as co-ligands
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