Synthesis (via reductive elimination or metathesis) and x-ray crystal structure of a tetrameric meso-tin(II) metallocycle Sn(CHSiMe2C6H4CHSiMe3-o), and characterisation of meso,meso-Sn(CHSiMe3C6H4CHSiMe3-o)2

Michael F. Lappert, Wing-Por-leung, Colin L. Raston, Andrew J. Thorne, Brian W. Skelton, Allan H. White

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Abstract

A yellow, diamagnetic tin(II) metallocycle, meso-Sn(CHSiMe3C6H4CHSiMe3-o) (I) showing a monomeric parent ion in its mass spectrum and a first ionisation energy at 7.6 eV in its photoelectron spectrum, is tetrameric in the solid with an Sn4 ring (Sn-Sn 2.852(3) Å), as determined by X-ray structure analysis, and was isolated as a minor product on treating SnCl4 with [{o-C6H4 (CHSiMe3)2}{Li(tmeda)}2] (II) at -78° C (but not +30° C) [tmeda = Me2NCH2CH2NMe2] in OEt2. The major product is the spirocyclic complex Sn(CHSiMe3C6H4CHSiMe3-o)2 in which both ligands are in the meso configuration; compound I was more conveniently obtained from II and Sn(OC6H2Me-4-But2-2,6)2.

Original languageEnglish
JournalJOURNAL OF ORGANOMETALLIC CHEMISTRY
Volume233
Issue number3
DOIs
Publication statusPublished - 27 Jul 1982
Externally publishedYes

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