A bis(silylene)pyridine pincer ligand can stabilize mononuclear manganese(0) complexes: facile access to isolable analogues of the elusive d⁷-Mn(CO)₅ radical.

ABSTRACT: Using the potentially tridentate N,N'-bis(N-heterocyclic silylene)pyridine [SiNSi] pincer-type ligand, 2,6-N,N'-diethyl-bis[N,N'-di-tert-butyl(phenylamidinato)silylene] diaminopyridine, led to the first isolable bis(silylene)pyridine-stabilized manganese(0) complex, {κ³-[SiNSi]Mn(dmpe)} 4 (dmpe = (Me₂P)₂C₂H₄), which represents an isolobal 17 VE analogue of the elusive Mn(CO)₅ radical. The compound is accessible through the reductive dehalogenation of the corresponding dihalido (SiNSi)Mn(ii) complexes 1 (Cl) and 2 (Br) with potassium graphite. Exposing 4 towards the stronger π-acceptor ligands CO and 2,6-dimethylphenyl isocyanide afforded the related Mn(0) complexes κ

SUBMITTER: Kalra S 

PROVIDER: S-EPMC9337724 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature