52 research outputs found
THE VIBRATIONAL SPECTRA, STRUCTURE, AND NATURE OF THE P:N BOND IN N,P,P,P-TETRAMETHYLPHOSPHINE IMIDE AND N-METHYL- -P,P,P-TRIMETHYLPHOSPHINE IMIDE
Author Institution: Department of Chemistry, California State UniversityThe vibrational spectra of the compound N,P,P,P-tetramethylphosphine imide and its N-methyl- analogue have been found to be consistent only with a structure whose vibrational potential function exhibits large deviations from local symmetry at both phosphorus and nitrogen. All 48 vibrational fundamentals expected under molecular point symmetry have been assigned based on group frequencies, isotopic frequency shifts, and Raman depolarization measurements. The P:N torsional modes have been assigned at 112 and in the light and heavy molecules, respectively, and threefold barriers of 2.06 and 2.42 kcals/mole, respectively, have been calculated from these assignments
Synthesis and Study of the Thermal Epimerization of r -2-Ethoxy- cis -4- cis -5-Dimethyl-1,3,2-λ 3 -Dioxaphospholane Using 31 P NMR
Synthetic Polyphosphonates, Polyphosphates, and Phosphonocarboxylates as Allosteric Effectors of Hemoglobin
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