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Spin delocalization in radical anions containing two phosphaalkene groups: an EPR study
Author(s) -
Badri Abdelouahed Al,
Jouaiti Abdelaziz,
Geoffroy Michel
Publication year - 1999
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/(sici)1097-458x(199910)37:10<735::aid-mrc538>3.0.co;2-c
Subject(s) - chemistry , electron paramagnetic resonance , delocalized electron , electron delocalization , furan , electrochemistry , spectral line , spin (aerodynamics) , photochemistry , computational chemistry , crystallography , nuclear magnetic resonance , organic chemistry , physics , electrode , astronomy , engineering , aerospace engineering
The radical anions of various isomers of phenyldiphosphaalkenes were generated by electrochemical and chemical reductions. The resulting EPR spectra in liquid and frozen solutions show that the spin delocalization on the phosphaalkene groups is dependent upon the nature of the isomer. The corresponding spin densities are compared with those predicted by DFT calculations on model diphosphaalkene anions. The role of the bridging group between the two PC bonds was investigated by studying the diphosphaalkene derivatives of diphenyl and furan. Copyright © 1999 John Wiley & Sons, Ltd.