Properties of Substituted Triarylphosphaalkenes

T Van Der Does, F Bickelhaupt

Index: Does, T. van der; Bickelhaupt, F. Phosphorus and Sulfur and the Related Elements, 1987 , vol. 30, p. 515 - 518

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Abstract

Substituted phosphaalkenes (1) were synthesized by the method developed by Becker (2) (Scheme 1). ... Reaction of substituted benzophenones with lithium mesityl(trimethylsilyl)- phosphide 2 leads to phosphaalkenes with 31 P chemical shifts which correlate with the Hammett values as expected (Table 1): electron donating substituents such as dimethylamino increase the electron density on phosphorus and cause an upfield shift; electron withdrawing substituents such ...