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Why are pi-"complexes" known for transit...

Why are `pi-"complexes"` known for transition metals only?

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Since transition metal atoms have either half-filled or vacant d-orbitals, they can accept ligands with electron density resulting in `p(pi)-dpi` bonding. Therefore, `pi`-complexes ar possible.
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DINESH PUBLICATION-CO-ORDINATION COMPOUNDS -Questions from board examinations
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