Synthesis, Structure, Photochemical [2 + 2] Cycloaddition, Transformation, and Photocatalytic Studies in a Family of Inorganic–Organic Hybrid Cadmium Thiosulfate Compounds

Abstract

Three new inorganic–organic hybrid cadmium thiosulfate compounds, [Cd(C12H11N2)2(H2O)(S2O3)2] (I), [Cd2(C12H10N2)3(H2O)4(S2O3)2] (II), and [Cd(C12H10N2)S2O3] (III), have been prepared using bispyridylethene (bpe) as a coligand. The compounds have connectivity between the Cd centers, the bpe, and the thiosulfate units, giving rise to molecular (zero) (I), two (II), and three dimensionally (III) extended structures. The formation of Cd4S4 tetrameric cluster units in III is noteworthy. The two-dimensional compound, II, was found to be a reactive intermediate and transforms to the three-dimensional compound, III, as a function of reaction time. The [2 + 2] photochemical reactions carried out on all of the compounds suggest the facile formation of the cyclized products. The photodimerization studies resulted in a one-dimensional structure (Ia) from the molecular complexes of I and rigid cyclized products in II and III. The present study illustrates the usefulness of the photochemical method as a viable alterna...