A new heptanuclear tin cluster containing sulfur and oxygen in the framework

Day, R. O. ; Kumara Swamy, K. C. ; Schmid, C. G. ; Holmes, R. R. (1989) A new heptanuclear tin cluster containing sulfur and oxygen in the framework Phosphorus, Sulfur, and Silicon and the Related Elements, 41 (3-4). p. 458. ISSN 1042-6507

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Related URL: http://dx.doi.org/10.1080/10426508908039737

Abstract

We have recently reported that new structural forms having the cube, (n-BuSn(O)O2PPh2)4, and oxygen-capped, [(n-BuSn(OH)O2PPh2)3O] [O2PPh2], formulations can be prepared by the reaction of n-butylstannonic acid with the corresponding diorganophosphinic acid. In new work exploring the effects of the bulky mesityl group bound to phosphorus, a cube formulation was also obtained. When n-butylstannonic acid was reacted with dicyclohexylphosphinic acid in the presence of nitric acid an oxygen-capped cluster having nitrate as the anion was obtained, demonstrating that the phosphinate anion is not required to stabilize the o-capped cation. In an attempt to generate similar structural forms, with sulfur replacing oxygen in the framework, the reaction of n-butylstannonic acid with diphenylphosphine oxide in the presence of elemental sulfur has been explored. From this reaction, a new structural form, containing seven hexacoordinate tin atoms and incorporating sulfur into the framework, [(n-BuSn(S)O2PPh2)3O]2Sn, was obtained in a mixture of products. A comparison of the crystal structures of the three compounds indicates that the new form has structural features in common with both the cube and the o-capped cluster.

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Deposited On:20 Dec 2010 07:59
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