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Difference between Hard Bases and Soft Bases. |
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Answer» Hard Bases : (i) The ligands which preferably combine with hard acids are called hard bases. Ex: NH3, R3N, H2O and F– etc. (ii) Hard bases (ligands) are also small, not very polarisable and having high electronegativity. Soft Bases : (i) The ligands which preferably combine with soft acids are called soft bases. Ex: R3P (phospines), R2S (thioethers), CO, CN–, H– etc. (ii) Soft bases (ligands) are large sized, more polarisable and having low electronegativity. |
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