Organotin clusters and cages have been synthesized in quantitative yields by using a benign solventless synthetic methodology. Using this method a variety of structural forms, which include the drum, O-capped cluster, tetranuclear oxo cage, discrete, and polymeric compounds, have been synthesized. All these compounds (1−11) have been characterized by spectroscopic and analytical techniques. The new compounds, which include the hexameric drum [n-BuSn(O)OCOAd]6 (Ad = adamantyl) 9, a triorganotin-based discrete structure Ph3SnO2C-C6H2-2,4,6-Me3 (10), and a polymer Ph3SnOSO2-C6H3-2,5-Me2 (11), have been characterized by single-crystal X-ray crystallography.
V. Chandrasekhar, Baskar, V., Boomishankar, R., Dr. Gopal K., Zacchini, S., Bickley, J. F., and Steiner, A., “Solventless Reactions for the Synthesis of Organotin Clusters and Cages”, Organometallics, vol. 22, pp. 3710-3716, 2003.