hard-hard interaction are ionic while soft-soft interaction are covallent explain why
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According to HSAB concept, hard acids prefer binding to the hard bases to give ionic complexes, whereas the soft acids prefer binding to soft bases to give covalent complexes. It is sometimes referred to as Hard-Soft Interaction Principle (HSIP). ... i.e., the interactions between them are more covalent.
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Theoretical Interpretation of the Hard Soft Acid-Base Principle is that hard-hard preferences reflect superior electrostatic stabilization while soft-soft preferences reflect superior covalent stabilization.
Explanation:
The hard-hard and soft-soft preferences in Lewis acid-base interactions reflect that
The lone pair of a hard base is strongly stabilized electrostatically by a hard acid
The lone pair of a soft base is strongly stabilized by forming a covalent bond with a soft acid
The lone pair of a hard or soft base is comparatively weakly stabilized by an acid opposite to it in hardness or softness since the overall electrostatic and covalent stabilization of the adduct is comparatively weak.
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