## Abstract The ^29^Si and ^13^C NMR chemical shifts are reported for trimethylsilyl derivatives of 25 amino acids, the majority of which occur naturally as protein constituents of foodstuffs. The ^29^Si chemical shifts in trimethylsilyl esters of amino acids roughly correlate linearly with the p__
13C NMR spectra of amino-alkylphosphonic acids
✍ Scribed by Zdzislaw Głowacki; Marek Topolski
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 197 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
13C chemical shifts and ,'P,13C coupling constants are reported for 20 aminoalkylphosphonic acids and two phosphonic acids. The substituent-induced chemical shifts of the phosphonate group were calculated and their non-additivity in 1 -aminoalkylphosphonic acids was observed. Two stable conformers of 4- aminobutylphosphonic acid were detected by 13C NMR. KEYWORDS "C NMR chemical shifts Substituent effects Aminoalkylphosphonic acids Intramolecular interactions ' Data taken from Ref. 3.
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## 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 correla
## Abstract The ^13^C NMR spectra of a number of derivatives of the cyclic acylal of malonic acid and of dimethylbarbituric acid are reported. These compounds contain an electron poor polarized carbon ‐ carbon double bond and act therefore, as Lewis acids.