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The lowest excited triplet state of triphenylboron and of the isoelectronic triphenylcarbenium ion

✍ Scribed by H. Slama; Chr. Bräuchle; J. Voitländer

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
480 KB
Volume
102
Category
Article
ISSN
0009-2614

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✦ Synopsis

Triphenylboron BPh3 and the triphenylcarbenium salts C%'h3/SbCl, and C%3/BF~ have been investkated by ODMR and emission spectroscopic methods. The zero-field splitting_tZFS) parameters D and E and the decay rate constants of the triplet zero-field levels (ZFL) as well as the phosphorescence spectra were mencured. The non-zero E values indicate a symmetry lower than Da for the Jahn-Teller unstable triplet state of all compounds. The radiative decay of T1 shows a strong deloc.dization of the triplet wavefunction for C?h 3. but a strong localization on the benzene rings for BPh3. This is in ageement with Xl0 calculations.

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