Structural characterization of the S-benzyldithiocarbazate derived from 2-formylpyridine N-oxide and its dimeric copper(II) nitrate complex

Abstract The thiobenzyl dithiocarbazate of 2-formylpyridine N-oxide, 2-C 5 H 4 N(O) CHNNHC(S)SCH 2 C 6 H 5 , crystallizes from ethanol as centrosymmetric dimeric units as a consequence of intermolecular N(O) … HN bonds [O … N 2.763(4) A]. In the centrosymmetric copper(II) complex, {Cu(ONO 2 )[2-C 5 H 4 N(O)CHNNC(S) SCH 2 C 6 H 5 ]} 2 , the anionic ligand is coordinated via the N-oxide oxygen, the azomethine nitrogen and the thiol sulphur atoms. Including the nitrato group, the coordination geometry is primarily distorted square planar [with CuO(1) 1.949(1), CuN(9) 1.939(2), CuS(12) 2.254(1), CuO(22) 1.963(2) A], but weak axial interactions to a second oxygen atom of the nitrato group [2.682(2) A] and a neighbouring N-oxide oxygen atom [2.674(2) A] complete an octahedron for the copper atoms in the dimeric units.