Carbon and Phosphorus Relaxation in Some Phenylphosphorus Compounds

Document Type

Article

Language

eng

Publication Date

1-1979

Publisher

Elsevier

Source Publication

Journal of Magnetic Resonance (1969)

Source ISSN

1090-7807

Abstract

Carbon and phosphorus relaxation times have been determined for several phenylphosphorus compounds. The relaxation time for the α carbon is dominated by the dipole-dipole mechanism at lower temperature and the spin-rotation mechanism at high temperature. All other carbons in these molecules are relaxed predominantly by the dipole-dipole mechanism, except that at the highest temperatures a spin-overall rotation mechanism becomes important for some. The importance of the spin-rotation mechanism is related to chemical shielding. The chemical shift anisotropy mechanism makes a significant contribution to phosphorus relaxation in most of these compounds. Spin-rotation is also a significant mechanism, while the dipole-dipole mechanism is apparently relatively unimportant in phenylphosphorus compounds.

Comments

Journal of Magnetic Resonance (1969), Vol. 33, No. 1 (January 1979): 127-134. DOI.

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