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Dibutyltin oxide
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Dibutyltin oxide : ウィキペディア英語版
Dibutyltin oxide

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Dibutyltin oxide, or dibutyloxotin, is an organotin compound with the chemical formula (C4H9)2SnO. It is a colorless solid that, when pure, is insoluble in organic solvents. It is used as a reagent and a catalyst.〔Davies, Alwyn G. "Organotin Chemistry", 2nd Edition, 2004, Wiley-VCH: Weinheim. ISBN 978-3-527-31023-4.〕
==Structure==
The structure of diorganotin oxides depends on the size of the organic groups. For smaller substituents, the materials are assumed to be polymeric with five-coordinate Sn centers and 3-coordinate oxide centers. The result is a net of interconnected four-membered Sn2O2 and eight-membered Sn4O4 rings. The presence of pentacoordinate Sn centers is deduced from 119Sn NMR spectroscopy and 119Sn Mössbauer spectroscopy.〔Beckmann, Jens; Jurkschat, Klaus; Rabe, Stephanie; Schuermann, Markus "Hexakis(2,4,6-triisopropylphenyl)cyclotristannoxane - a molecular diorganotin oxide with kinetically inert Sn-O bonds" Zeitschrift fur Anorganische und Allgemeine Chemie 2001, volume 627, 2413-2419. 〕

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