Tetramethylsilane

Japanese: テトラメチルシラン

The chemical formula is (CH ₃ ) ₄ Si. It is abbreviated as TMS. It is a colorless, volatile liquid with a boiling point of 26-27°C. It is extremely stable chemically and is not decomposed by concentrated sulfuric acid or concentrated alkali. The chemical shifts of ^{the 1} H and ¹³ C nuclei are not easily affected by the solvent effect (the effect of the solvent on the reaction rate and equilibrium in a liquid phase reaction), and are less likely to overlap at high magnetic fields than the chemical shifts of ^{the 1} H and ¹³ C nuclei of other compounds. A small amount of TMS is added to a nuclear magnetic resonance sample solution as an internal standard, and the chemical shift expressed in ppm is called the δ value.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

化学式(CH₃)₄Si。TMSと略称。無色揮発性の液体で沸点26～27℃。化学的にきわめて安定で，濃硫酸，濃アルカリにも分解されない。¹Hおよび¹³C核の化学シフトが溶媒効果(液相反応において，溶媒が反応速度や平衡に及ぼす効果)を受けにくく，また他の化合物の¹Hおよび¹³C核の化学シフトより著しく高磁場で重なることが少ない。TMSを核磁気共鳴試料溶液に少量加えて内部基準とし，ppm単位で表した化学シフトをδ値という。

出典　株式会社平凡社世界大百科事典第２版について　情報

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