Does the ipso-carbon chemical shift tell us anything about the structure of phenylated phosphorus compounds?
The NMR signals exhibited by the ipso-carbon atoms of a variety of phenylated phosphorus compds., e.g., Ph5P, were found to span over the remarkably wide range of +162 to +117 ppm. Nevertheless, these changes in chem. shifts have little diagnostic value. They are tentatively attributed to a charge-mediated contraction and expansion of the C,P s-bond orbital on one hand and to a s-bond induced deformation of the arom. p-electron cloud on the other. [on SciFinder (R)]
Organometallic and Organometalloidal Compounds
Inst. Chim. Org.,Univ. Lausanne,Lausanne,Switz.
written in English.
143-66-8; 603-34-9 (Triphenylamine); 791-28-6; 1779-49-3; 2588-88-7; 2751-90-8; 3151-19-7; 6399-81-1; 14580-93-9; 16999-47-6; 39654-93-8; 62126-57-2 Role: PRP (Properties) (NMR of, ipso-carbon chem. shift in relation to); 14762-74-4 Role: RCT (Reactant), RACT (Reactant or reagent) (nuclear magnetic resonance, of phenylated phosphorus compds., ipso-carbon chem. shift in relation to)
Record created on 2006-03-03, modified on 2016-08-08