Two-path spin–spin coupling in tetrastannacyclohexanes

✍ Scribed by Terence N. Mitchell; Rüdiger Faust; Bodo Fabisch; Roland Wickenkamp

• Book ID: 102527476
• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 261 KB
• Volume: 28
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1260280115

✦ Synopsis

Abstract

Tin‐119 NMR data are presented for thirteen 1,2,4,5‐tetrastannacyclohexanes. The one‐bond tin‐tin coupling constant shows a monotonic decrease with increasing methyl substitution at the ring carbon atoms. In a series of compounds the two‐path couplings ^2+4^J(SnSn) and ^3+3^J(SnSn) can be assigned and interpreted on the basis of a sign change for the former coupling. Values of ^4^J(SnSn) for substituted 2,3,5,6‐tetrastannaheptanes suggest that the magnitude of the four‐bond component of ^2+4^J(SnSn) in the stannacycles can be considerable.