ISSN:
0306-042X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Trimethylsilyl (TMS) ethers, acetates, cyclic alkane boronates (of diols) and nicotinates were evaluated as derivatives for determining the structure of n-, iso- and anteiso- long-chain alcohols and 1,2-diols. The nicotinates were the most satisfactory for both the mono- and dihydric compounds; their spectra contained a series of ions produced by radical-induced cleavage following random hydrogen abstraction from the aliphatic chain, and the differences in relative abundances of these ions reflected the position of methyl branching. In the spectra of all the derivatives studied, ions at m/z 56 and 70 were characteristic of the iso- and anteiso-structures respectively, but only in the spectra of the acetates of the monohydric alcohols were the relative abundances of these ions diagnostically useful. The cyclic alkane boronates were found to be poor indicators of chain structure. Several new fragmentations of the TMS derivatives of primary alcohols are reported.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bms.1200110707
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