Accession Number:

AD0618837

Title:

THE RELATIVE ACCEPTOR POWER OF BORON TRIHALIDES AND BORANE TOWARD TRIMETHYLAMINE BY PROTON N.M.R. MEASUREMENTS,

Descriptive Note:

Corporate Author:

MCGILL UNIV MONTREAL (QUEBEC) INORGANIC CHEMISTRY LAB

Personal Author(s):

Report Date:

1964-01-29

Pagination or Media Count:

7.0

Abstract:

Proton n.m.r. spectra of .imethylamine adducts of the boron trihalides and borane were measured in chloroform solution. Chemical shifts of methyl protons relative to etramethylsilane decrease in the order BBr3 BCl3 BH3 BF3, suggesting that this is the order of acceptor activity toward trimethylamine. This is supported by the existence of a linear relationship between methyl proton chemical shifts and the heats of formation, dipole moments, or infrared vibrational shifts of boron trihalide and borane adducts. Splitting of methyl proton resonances into quarters have been observed for CH33N.BCl3 and CH33N. BBr3 but not for CH33N.BF3 and CH33N.BH3. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE