Unsaturated Phosphorus Compounds: Spatial and, Electronic Structure on the Base of Electrical and Electrooptical Methods

The influence of classical systems connected with phosphorus atom: >P(Y)-C(R)=CP(Y)-C≡S- and unusual ones, -P=E and P≡S- on spatial and electronic structure of or-ganophosphorus compounds has been considered. On the complex analysis ground of polarity and polarizability data, obtained for model olefines, imines, acetylenes and nitriles the existence of nonformal similarity between this compounds classes has been demonstrated. It is reflected in analogy of conformational behaviour and electron effects, realized with participation of multiple carbon, nitrogen and phosphorus bonds: