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Trimethylstannylboranes—inverse detection of broad 119Sn NMR signals in solution and solid-state 119Sn cross-polarization magic angle spinning NMR

✍ Scribed by Bernd Wrackmeyer; Ēriks Kupče; Jörg Kümmerlen

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
348 KB
Volume
30
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Extremely broad ^119^Sn resonances, as the result of ^1^J(^119^Sn,^11^B) scalar coupling, were readily detected, even for diluted samples (5 mg in 0.5 ml of C~6~D~6~), via inverse two‐dimensional ^1^H{^119^Sn} NMR experiments. Two bis(amino)trimethylstannylboranes and four dialkylaminobis(trimethylstannyl)boranes were studied. The reaction between diisopropylaminobis(trimethylstannyl)borane and trimethoxyborane was monitored by the same technique, leading to the detection of diisopropylaminomethoxytrimethylstannylborane and dimethoxytrimethylstannylborane as reaction products. Crystalline dicyclohexylaminobis(trimethylstannyl)borane was studied by ^119^Sn CP/MAS NMR. In spite of the proximity of ^119^Sn to the quadrupolar ^11^B nucleus, meaningful spectra could be obtained in a short time (≤ 2 h).

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