Analysis of the NMR spectra of some dimethylsilanes

The spectra of the protons in the CH2 groups α to silicon in dimethylsilanes show a characteristic distorted triplet‐like structure. These protons resonate in a characteristic region of the spectrum, and the features are often used to identify these silanes. Many such silanes are used in industry, since they have a variety of useful properties and can be easily made by hydrosilylation reactions. The spectra are clearly not amenable to first‐order analysis, but rather form part of a classic AA′XX′ spin system. We report the complete analysis of the proton NMR spectrum of dimethylpropylsilane, its alkyl analog, 2‐methylpentane, and dimethylethylsilane. Copyright © 2000 John Wiley & Sons, Ltd.