Trimethylsilyl group

The trimethylsilyl group (–Si(CH3)3, abbreviated TMS) is a functional group in organic chemistry. This group consists of three methyl groups bonded to a silicon atom, which is in turn bonded to the rest of a molecule. This structural group is characterized by chemical inertness and a large molecular volume. Compounds with trimethylsilyl groups are not normally found in nature, but have applications in chemical synthesis and analysis.

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