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Abstract
Mechanism of the formation of diethyltrichloromethylphosphine (3a) in the model reaction between diethylphosphine (5a) and carbon tetrachloride in the presence of triethylamine has been studied. It has been found that chlorodiethylphosphine (6a) increases the rate of the formation of the phosphine 3a, whereas methanol changed the reaction course to produce diethylphosphine oxide (13a) as a major product. This findings let us to propose that the transformation of diethylphosphine (5a) into diethyl-trichloromethylphosphine (3a) involves the multistep reaction sequence (Scheme 8) which includes the formation of chlorodiethylphosphine (6a) and tetraethyldiphosphine (18a) as the crucial intermediates.