Charge-transfer spectra of organometallic complexes—I. Formation constants for complexes of trialkyltiniodides with iodine in carbon tetrachloride solutions

A charge-transfer complex is formed as reaction intermediate in the iodinolysis of R 3SnI (R = CH 3, C 2H 5, n-C 3H 7, iso-C 3H 7, n-C 4H 9, iso-C 4H 9 and sec-C 4H 9) in CCl 4 solutions. By means of the spectrophotometric molar ratio method and by the detection of an isosbestic point at 510 nm, the...

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Bibliographic Details
Published in:Spectrochimica acta. Part A: Molecular spectroscopy 1983, Vol.39 (11), p.959-962
Main Authors: Hoste, S., Herman, G.G., Roelandt, F.F., Lippens, W., Verdonck, L., Van der Kelen, G.P.
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Intensities and shapes of molecular spectral lines and bands
Molecular properties and interactions with photons
Physics
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Summary:A charge-transfer complex is formed as reaction intermediate in the iodinolysis of R 3SnI (R = CH 3, C 2H 5, n-C 3H 7, iso-C 3H 7, n-C 4H 9, iso-C 4H 9 and sec-C 4H 9) in CCl 4 solutions. By means of the spectrophotometric molar ratio method and by the detection of an isosbestic point at 510 nm, the complex species was identified as a 1 : 1 molecular adduct between the alkyltiniodide and iodine. Formation constants of the complex were calculated using a non-linear regression analysis of absorbancy measurements on the perturbed iodine band. With the aid of these constants, the maxima of the charge-transfer peaks (u.v. region) and blue shifted iodine peaks (visible region) could be accurately determined.
ISSN:0584-8539
DOI:10.1016/0584-8539(83)80084-1