Metal-ligand cooperativity across two sites of a square planar iron() complex ligated by a tetradentate PNNP ligand

An iron( ii ) complex with a square planar geometry and S = 1 ground state was synthesized using a rigid tetradentate bisphosphine-bisamide [PNNP] 2− ligand. This complex was shown to bind an equivalent of PMe 3 to produce a five-coordinate low spin complex, and to react with two equivalents of bora...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2020-07, Vol.56 (61), p.8611-8614
Main Authors: Hatzis, Gillian P, Thomas, Christine M
Format: Article
Language:English
Subjects:
Coordination compounds
Crystallography
Equivalence
Iron
Ligands
Reagents
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Summary:An iron( ii ) complex with a square planar geometry and S = 1 ground state was synthesized using a rigid tetradentate bisphosphine-bisamide [PNNP] 2− ligand. This complex was shown to bind an equivalent of PMe 3 to produce a five-coordinate low spin complex, and to react with two equivalents of borane reagents via addition of two B-H bonds across the metal-amide bonds in a metal-ligand cooperative fashion. A square planar (PNNP)Fe II complex is shown to readily activate two B-H bonds across the Fe-amide linkages in an overall four-electron process facilitated by metal-ligand cooperativity.
ISSN:1359-7345
1364-548X
DOI:10.1039/d0cc02152k