Conclusions
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1.
From the IR spectra of a number of boron acylates it follows that in the molecules of these compounds the Alk2B group exerts considerable influence on the carbonyl group. A possible reason for this effect can be the influence of the field of the polar B-O bond, as well as conjugation involving the orbital of the unshared pair of electrons of the bridge oxygen atom.
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2.
A symbatic relation is observed between the frequencies of the C=O group of compounds containing an oxygen bridge and the electronegativity of the atoms of the substituent that is directly adjacent to the bridge.
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Literature cited
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M. F. Shostakovskii, Yu. L. Frolov, O. A. Zasyadko, A. I. Borisova, and A. Kh. Filippova, Izv. Akad. Nauk SSSR, Ser. Khim., 2229 (1968).
G. Michel and M. Renson, Spectrochim. Acta,23A, 1435 (1967).
S. S. Batsanov, Electronegativity of Elements and the Chemical Bond [in Russian], Izd. SO AN SSSR, Novosibirsk (1962).
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1196–1197, May, 1972.
The authors express their gratitude to V. A. Dorokhov for consultation relative to the synthesis of the studied compounds.
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Shorygin, P.P., Lopatin, B.V. & Boldyreva, O.G. Mutual effect of atomic groups and spectra of acyloxydialkylboranes and other acylates. Russ Chem Bull 21, 1151–1153 (1972). https://doi.org/10.1007/BF00853795
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DOI: https://doi.org/10.1007/BF00853795