Three New Structural Types of Mo/Ag/S Polymeric Complexes.

Wavelike, zigzag, and helical polymers are formed by the reaction of [MoS4 ]2- , Ag2 S, and a complementary cation. The framework of the polymeric anions depends on the valence state of the latter. For example, the butterfly-type anionic chain shown in the picture is formed upon use of a divalent cation. There is a general tendency that a higher valence state of the cation will induce a more compact chain structure.