Crystal structure of catena-{poly[bis(O,O′-diethyldithiophosphato-S)-(μ2-1,2-bis(4-pyridylmethylene)hydrazine-N,N′)-zinc(II)] di-acetonitrile solvate}, C20H30N4O4P2S4Zn ⋅ 2 C2H3Nn - Tan, Yee Seng *; Tiekink, Edward R. T. * (de Gruyter Open, 2019)