Reactions of barium thiocyanate with trans-1,2-bis(4-pyridyl)ethylene (bpe) in acetonitrile/water using different molar ratios always lead to the formation of a new barium coordination polymer of composition {[[Ba(NCS)(H2O)5]2](bpe)}(NCS)2(bpe)3(H2O)2 (1). During the preparation of single crystals of compound 1, three additional new compounds were obtained (2 – 4), of which one crystallizes in ...
