Abstract
By the PM3 methods, standard values of entropy, heats and Gibbs energies of formation, first ionization potentials and dipole moments of the molecules have been computed for 65 inorganic and organic arsenic compounds. Linear dependences Pexper=bPtheor (where P is any of the mentioned properties) have been stated, allowing a priori evaluation of thermodynamic and molecular characteristics of As-containing substances. It has been shown that for arsine the PM3 method overestimates gaseous-phase proton affinity not more than by 10%. Triphenylarsinedichloride existence in benzene solution in the form of trigonal bipyramid with two axial chlorine atoms has been concluded.
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