As(III)/Sb(III)/Bi(III)–halide distances and stretching vibrations. An application of the Varshni relationship upon hypervalent group 15 compounds

A Varshni treatment between stretching frequencies and bond lengths is given for 16 heterocycles of the types Hal–M(SCH 2CH 2) 2X and Hal–M(CH 2CH 2CH 2) 2X (M=As/Sb/Bi, Hal=Cl/Br/I, X=O, S, NR). The intensities of the Raman emissions for the M–Hal bonds increase in the following order: Cl≪Br<I....

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Published inSpectrochimica acta. Part A, Molecular and biomolecular spectroscopy Vol. 54; no. 1; pp. 85 - 90
Main Authors Zickgraf, Andrea, Bräu, Elmar, Dräger, Martin
Format Journal Article
LanguageEnglish
Published Elsevier B.V 1998
Subjects
Group 15 halides
Hypervalency
Varshni relationship
Group 15 halides
Varshni relationship
Hypervalency
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Summary:A Varshni treatment between stretching frequencies and bond lengths is given for 16 heterocycles of the types Hal–M(SCH 2CH 2) 2X and Hal–M(CH 2CH 2CH 2) 2X (M=As/Sb/Bi, Hal=Cl/Br/I, X=O, S, NR). The intensities of the Raman emissions for the M–Hal bonds increase in the following order: Cl≪Br<I. The slopes of linear fits, bond length vs. (force constant) −1/2, decrease in the following order: Cl>Br≫I. Practically, the Varshni constants are used to estimate the complementary quantity, stretching frequency or bond length, in 35 cases.
ISSN:1386-1425
DOI:10.1016/S1386-1425(97)00212-6