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Probing the electronic structure of phosphorins (phosphabenzenes) by 13C NMR spectroscopy

✍ Scribed by T. Bundgaard; H.J. Jakobsen; K. Dimroth; H.H. Pohl

Publisher
Elsevier Science
Year
1974
Tongue
French
Weight
238 KB
Volume
15
Category
Article
ISSN
0040-4039

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✦ Synopsis

1eC NMR has proven an extremely useful tool in studies of organophosphorus compounds. Valuable information on their geometrical and molecular electronic structure may be obtained from three sets of parameters: (i) 13C chemical shifts, (ii) 13C-31P nuclear spin couplings (including their signs), and (iii) 1aC spin-lattice relaxation times (T,) [f,~]. In connection with our current studies on phospholes [3] we have undertaken a 13C NMR investigation on some phosphorins (phosphabenzenes) with the purpose of probing their electronic structure. CND0/2 and PE spectral approaches to this problem have recently been performed [4]. I n this paper we report on the first determination of 13C chemical shifts and 13C-31P coupling constants in A3-and As-phosphorins [5].

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