Abstract
In terms of perturbation theory the square complexes of transition elements of PtCl 2− 4 type have been demonstrated to weaken the bond of a ligand in trans-position as a result of the substitution of the acido ligand by a more covalent one. The bond of a ligand in cis-position may become either more or less strong, however, the weakening of the bond in cis-position is always less than in trans-position. A similar substitution in square complexes of non-transition elements of XeF 4 type leads to a greater weakening of the bond in trans-position compared to that in cis-position. The theoretical conclusions correspond to experimental data.
Published Version
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