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Why we use TMS in NMR spectroscopy?
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Answer Posted / mehdi hatefi
TMS Stands for TetraMethylSilane.Si(CH3)4
Owing to the electronegativity difference between Silicon
and Carbon,electron density on carbon is greater than silicon and hydrogen atoms of methyl group are greatly shielded and compared to most of organic compounds,hydrogen atoms of TMS resonate at a higher frequncy that by definition sigma value for TMS is zero
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