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- W1276074818 abstract "The intensity of the molecular ion in straight-chain and branched alcohols decreases with increasing molecular weight. The peak representing the loss of water from the molecular ion can easily be mistaken for the molecular ion. A primary alcohol is indicated when the m/z 31 peak is intense and will be the base peak for C 1 –C 4 straight-chain primary alcohols. A peak is observed corresponding to a loss of 15 Daltons from the molecular ion. Many low-molecular weight ( 8 ) secondary and tertiary alcohols exhibit no M-18 peaks. The intensity of the molecular ion is generally less than 2.5%. The chapter discusses the mass spectra of TMS derivatives of aliphatic alcohols. Accordingly, the mass spectrum of the trimethylsilyl derivative is used to determine the molecular weight of the unknown alcohol, even though the molecular ion may not be observed. The presence of an intense m/z 31 peak further suggests that it is a primary aliphatic alcohol, ether, or possibly a ketene." @default.
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- W1276074818 date "1996-01-01" @default.
- W1276074818 modified "2023-09-26" @default.
- W1276074818 title "Alcohols" @default.
- W1276074818 doi "https://doi.org/10.1016/b978-012483385-2/50006-3" @default.
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