X-ray structures of heteroleptic zinc(II) complexes involving combinations of O,O'-dialkyldithiophosphato and bidentate N-donor ligands

The detailed X-ray structural elucidation of reaction products of a zinc(II) salt with O,O'-dialkyl- dithiophosphate and nitrogen-containing heterocycles (N-N = 1,10-phenanthroline (phen) or 2,2'-bipyridine (bpy)) has been performed. Surprisingly, together with (Zn(S 2 P(OR) 2 ) 2 (N-N)) compounds, also ionic-type com- plexes having the formula of (Zn(N-N) 3 )(S 2 P(OR) 2 ) 2 have been obtained using the same molar ratios of the reac- tants. The prepared complexes have been characterized by elemental analysis and single-crystal X-ray analysis. The crystallographic analysis showed that the bond lengths and bite angles of the prepared complexes are in good agreement with those of similar compounds. The crystal packing of described complexes is formed via π-π stack- ing interactions and/or C-H···S non-covalent contacts.