Diversity of the Structures in a Distannene Complex and its Reduction to Generate a Six‐Membered Ti2Sn4 Ring Complex1. Issue 2 (28th November 2013)

• Record Type: Journal Article
• Authors: Kuwabara, Takuya; Guo, Jing Dong; Nagase, Shigeru; Saito, Masaichi
• Is Part Of: Angewandte Chemie international edition. Volume 53:Issue 2(2014)
• Page Start: 434
• Page End: 438
• Publication Date: 2013-11-28
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201308565
• Languages: English
• ISSNs: 1433-7851

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>In contrast to olefin complexes, their congeners of heavier elements display various coordination modes, and their complexes may be present as bis(metallylene) complexes, with side‐on coordination, as metallacyclopropanes, or as π complexes. In the course of our studies on the reactivity of dilithiostannoles towards transition‐metal reagents, three‐membered TiSn₂ and six‐membered Ti₂Sn₄ ring complexes were obtained. According to its geometric parameters, NMR analysis, and theoretical calculations, the TiSn₂ complex cannot be categorized into any of these previously described bonding modes. Therefore, a novel resonance structure has been proposed for a complex that has a delocalized σ‐orbital over the TiSn₂ ring to understand its electronic structure. The mechanism for the formation of the Ti₂Sn₄ ring complex and its EPR spectrum are also discussed.</p> </abstract>