A structural study of metal complexes of bisphosphonate partial ester derivatives

Abstract

The final R value is 0.0258 for 2795 reflection measured. The X-ray analysis shows that benzene-1,3-diamine fragment in proton transfer compound is not contribute in the molecular structure of complex. The molecular structure consists of two metal fragments linked via the central four membered Sn2O2 ring. Each of two Sn atoms is coordinated by the chelate (pydc) 2ligand, one bridging oxygen atom of carboxylate group, two terminal methyl group and as well as by one terminal ethoxy group. Therefore, the coordination number is seven for each central atom and distorted pentagonal bipyramid geometry is observed around the tin atoms.