Bonding studies of compounds of boron and the group IV elements. Part IV. Redistribution equilibria among the boron trihalides by¹¹B nuclear resonance

1 January 1971

journal article
Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A

p. 383-385
https://doi.org/10.1039/j19710000383

Abstract

Redistribution equilibria: ⅔BX₃+⅓BY₃ BX₂Y and ⅓BX₃+⅔BY₃ BXY₂ among all the boron trihalides have been examined by ¹¹B n.m.r. spectroscopy in solvents methylcyclohexane and 1,1-dichloroethane at 33·5 °C; variable temperature studies have been completed for the BCl₃–BBr₃ systems. Entropy changes were also calculated from spectroscopic data and show tittle deviation from calculations based on symmetry factors alone. The reactions depart only slightly from thermoneutrality (–1) and endothermicity appears to increase with increasing disparity between the electronegativities of X and Y. There is no detectable solvent effect in the two media examined and, insofar as comparison permits, no significant deviation from the situation in the gas phase.

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Bonding studies of compounds of boron and the group IV elements. Part IV. Redistribution equilibria among the boron trihalides by11B nuclear resonance

Abstract

Keywords

Bonding studies of compounds of boron and the group IV elements. Part IV. Redistribution equilibria among the boron trihalides by¹¹B nuclear resonance