Synthesis and crystal structure of dinuclear tetraphenylantimony carboxylate derivatives based on different coordination modes

Two novel dinuclear tetraorganoantimony carboxylate derivatives were synthesized based on two different coordination modes, in which the environment of one of the two Sb atoms is described as trigonal bipyramid and the other is ascribed to distorted octahedron carrying four phenyl and one benzoate substituent. Structures of compound 1 and 2 were determined by single-crystal X-ray analysis, IR and NMR. Of the two compounds, a novel double-chain structure was shown in compound 1 through C–H⋯π weak interaction, while compound 2 exhibited a 1D chain by C–H⋯π weak interaction identically.