Journal
MOLECULES
Volume 27, Issue 20, Pages -Publisher
MDPI
DOI: 10.3390/molecules27207043
Keywords
cyclometallation; palladium; iminophosphoranes; NMR; crystal structure
Funding
- Xunta de Galica (Galicia, Spain) under the Grupos de Referencia Competitiva Programme [GRC2019/14]
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A series of novel diphosphane-derived metal complexes have been obtained through reactions, which contain two metal rings, each enclosing a P=N double bond. These complexes exhibit well-defined crystal structures.
Treatment of bis(iminophosphorane)phosphane ligands 2a-2e with Li2PdCl4 gave a set of novel diphosphane-derived complexes bearing two metallacycle rings, each one enclosing a P=N double bond: the unprecedented bis(iminophosphorane)phosphane-[C,N,S] palladacycles. In the case of the ligand derived from bis(diphenylphosphino)methane, 2a, both the single and the double palladacycle complexes were obtained. Reaction of 3a with bis(diphenylphosphino)ethane did not yield the expected product with the diphosphane bonded to both palladium atoms, but rather the novel coordination compound 5. The crystal structures of 3c and 5 are described.
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