Using the concept of three-electron bond we can represent the actual electron structure of benzene and other molecules, explain specificity of the aromatic bond and calculate the delocalization energy. Gives theoretical justification and experimental confirmation of existence of the three-electron bond. It was shown, that functional relation y=a+b/x+c/ x 2 fully describes dependence of energy and multiplicity of chemical bond from bond distance.

It can be shown that the anomalously high rates of rotation of the outer regions of galaxies follow from the constancy and finiteness of the rate of gravitational interaction, which is equal to the speed of light in accordance with general relativity of A. Einstein. Since the speed of propagation of the gravitational interaction is constant and equal to the speed of light, then for compensation of lag of the gravitational field, an increase in the mass velocity will always be used, since the metric tensor according to general relativity of A. Einstein is depends on to both geometry and kinematics of masses. Keywords: principle of constancy and finiteness of the speed of gravitational interaction, dark matter, field lag effect, general relativity of A. Einstein, metric tensor, speed of light.

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