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1‐alkynyldioxaborolanes: Determination of 1 J ( 13 C, 11 B) from 13 C NMR studies at 102°C
Author(s) -
Cheesman Bruce Victor,
Deloux Laurent,
Srebnik Morris
Publication year - 1995
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260330906
Subject(s) - chemistry , scalar (mathematics) , carbon 13 nmr , spectral line , carbon 13 , relaxation (psychology) , nuclear magnetic resonance , coupling (piping) , analytical chemistry (journal) , computational chemistry , stereochemistry , organic chemistry , physics , nuclear physics , geometry , quantum mechanics , psychology , social psychology , mathematics , mechanical engineering , engineering
Broad 13 C resonances, as the result of partially relaxed scalar 13 C 11 B coupling, were observed for the C‐1 and to a lesser extent C‐2 carbons of 1‐alkynyldioxaborolanes at 25°C. Measurement of the 13 C spectra at 102°C resulted in a slower 11 B quadrupolar relaxation rate and allowed the determination of 1 J ( 13 C, 11 B) scalar coupling from the resulting quadruplets for the C‐1 carbon.