en
Scientific article
Open access
English

EPR and theoretical studies of the reduction product of the fulvenephosphaallene system

Published inJournal of organometallic chemistry, vol. 634, no. 2, p. 136-144
Publication date2001
Abstract

Fluoren-9-ylidenemethylene-(2,4,6-tri-tert-butyl-phenyl)phosphane (2), a new type of phosphaallene with the terminal carbone incorporated in a cyclopentadienyl ring, has been synthesized and its crystal structure has been determined. The 31P and 13C (central carbon) hyperfine tensors of the reduction compound of this phosphaallene have been measured on the EPR spectra Recorded after electrochemical reduction of a solution of 2 in THF. Structures of the model molecules HP=C=Cp (where Cp is a cyclopentadienyl ring), [HP=C=Cp]√− and [HP---CH=Cp]√ have been optimized by DFT and the hyperfine couplings of the paramagnetic species have been calculated by DFT and SCI methods. The comparison between the experimental and the theoretical results shows that, in solution, the radical anion [2]√− is readily protonated and that the EPR spectra are due to the phosphaallylic radical.

Keywords
  • Phosphaallenes
  • EPR
  • DFT
  • Radical anion
  • Phosphaallylic radical
Citation (ISO format)
CHENTIT, Mostafa et al. EPR and theoretical studies of the reduction product of the fulvenephosphaallene system. In: Journal of organometallic chemistry, 2001, vol. 634, n° 2, p. 136–144. doi: 10.1016/S0022-328X(01)01098-1
Main files (1)
Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal0022-328X
604views
287downloads

Technical informations

Creation10/02/2009 3:18:49 PM
First validation10/02/2009 3:18:49 PM
Update time03/14/2023 3:15:36 PM
Status update03/14/2023 3:15:36 PM
Last indexation01/15/2024 7:03:45 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack