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29Si and 13C NMR spectra of tert-butyldimethylsilyl derivatives of amino acids

✍ Scribed by Roman Kubec; Jan Velíšek; Magdalena Kvíčalová; Jan Čermák; Jan Schraml

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
245 KB
Volume
33
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

^29^Si and ^13^C NMR chemical shifts are reported for tert‐butyldimethylsilyl (TBDMS) derivatives of ten common amino acids. The ^29^Si chemical shifts of TBDMS derivatives of various functionalities encountered fall into distinct spectral regions. The ^29^Si chemical shifts correlate linearly (r = 0.999) with the ^29^Si shifts reported earlier for the trimethylsilyl (TMS) derivatives of the same amino acids, the ^29^Si chemical shift values in the TBDMS derivatives being larger than those in the TMS derivatives (in SiN groups this downfiled shift varies between 3.8 and 5.8 ppm and in SiO groups between 1.4 and 1.7 ppm).

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