CONFORMATIONAL ISOMERISM OF PHOSPHORUS-CONTAINING FULLERENYL RADICALS

Citation
Bl. Tumanskii et al., CONFORMATIONAL ISOMERISM OF PHOSPHORUS-CONTAINING FULLERENYL RADICALS, Russian chemical bulletin, 43(9), 1994, pp. 1582-1584
Citations number
10
Categorie Soggetti
Chemistry
Journal title
ISSN journal
10665285
Volume
43
Issue
9
Year of publication
1994
Pages
1582 - 1584
Database
ISI
SICI code
1066-5285(1994)43:9<1582:CIOPFR>2.0.ZU;2-V
Abstract
ESR spectra of phosphorus-containing fullerenyl radicals C-.(60)-P(O)( OPri)(2) and C-.(60)-P(O)(OEt)Ph were studied at low temperatures (193 -273 K). A decrease in the rate of rotation of organophosphorus group around the C-P bond results first in line broadening and then in the a ppearance of two doublets due to two ''extreme'' conformations, which have different g-factors and hyperfine coupling constants (HCC) of the unpaired electron with the P-31 nucleus. The kinetic and thermodynami c parameters of the conformational isomerism were calculated.