From a Stable Silylene to a Mixed‐Valent Disiloxane and an Isolable Silaformamide–Borane Complex with Considerable Silicon–Oxygen Double‐Bond Character

Abstract

Kipping's dream has (almost) become reality with the first isolable silanone-like complex 2, prepared by borane-assisted addition of water to the stable silylene 1. The short Si–O bond in 2 points to considerable SiO character. In contrast, treatment of 1 with water in the absence of a borane leads to the crystalline siloxy silylene 3, an unprecedented mixed-valent disiloxane with di- and tetravalent silicon atoms (R=2,6-iPr2C6H3). Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z700398_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.