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A Coordination-Induced 1,4→1,2-Quinonediimine Isomerization

✍ Scribed by Jochen Rall; Andreas F. Stange; Klaus Hübler; Wolfgang Kaim

Book ID
101304195
Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
92 KB
Volume
37
Category
Article
ISSN
0044-8249

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✦ Synopsis

Hitherto unused in coordination compounds, the para-quinonoid azophenine (p-ap) has now been applied for the synthesis of Cu(PPh ) (o-ap) (1), in which the ligand exists as its ortho-quinonoid tautomer. Additional stabilization of this metal-π donor/ligand-π acceptor arrangement occurs through chelate-like hydrogen bonding between the NH functionalities, which are both now ortho-positioned, and the BF counterion.

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## Abstract 1‐Triphenylphosphoniobenzo[c]phospholide 1 reacts with [M(CO)~5~Br] (M = Mn, Re) and [Mn(CO)~3~(naphthalene)][BF~4~] to give complexes __cis__‐[M(CO)~4~(1)Br] (5 a,b) and [Mn(CO)~3~(1)][BF~4~] (6 a[BF~4~]), respectively, featuring __η__^1^(P)‐ and __η__^5^(π)‐coordination of the phosph