STRUCTURAL STUDY OF CARBANIONIC SPECIES FROM BIS(DIETHOXYPHOSPHONYL)-METHANE BY IR, RAMAN AND ¹H, ³¹P, ¹³C NMR SPECTROSCOPIES

Abstract

An IR and Raman study of the lithium associated carbanionic species 1 formed from bis(diethoxyphosphonyl)-methane in the solid state and in THF solution, as well as the IR and ¹H, ³¹P, ¹³C NMR study of the potassium associated one in pyridine and dimethylsulfoxide are reported. A chelated symmetrical structure exists in the solid state and in associating medium. The central carbon is planar or nearly so from the NMR data. However, the negative value of ² J _PH in the anionic species raises the problem of estimating the various factors involved in the two bond coupling constants.