Substituent Effects in Donor-Acceptor Complexes with D->A Coordination Bonds (D =N,O,S;A =B,Al,Ga,Sn,Sb) and Related Systems

摘要

The effect of substituent on the enthalpy AH0 and free energy DELTA G~0 of complexation,on the dipole moments of complexes mu_c and coordination bonds mu_(DA),and on the degree of charge transfer DELTA q was analyzed for 20 series of complexes with D->A coordination bonds (D =N,O,S;A =B,Al,Ga,Sn,Sb),hydrogen bonds,and charge transfer.It was found that DELTA H~0,DELTA G~0,mu_c,mu_(DA),and DELTA q depend not only on the inductive and resonance effects,but also on the polarization effect of substituents;its contribution varies in a wide range and can exceed 50%.