Reaction Medium pH Dependent Existence of Mn
II
Bound [ON] Donor Zwitterionic Chelating Ligand and Self‐Assembly of Hydroxido‐Bridged Mn
II4
Cluster
摘要:
AbstractA mononuclear MnN4O2 complex with two zwitterionic ligands and a centrosymmetric tetranuclear μ3‐OH‐bridged self‐assembled Mn4 cluster were synthesized and characterized by using the [NO(H)N] ligand HOPhbip [2,6‐bis(phenylmethyliminomethyl)‐4‐methylphenol]. The reaction in MeOH in the presence of NH4SCN and a lower stoichiometry of Mn(OAc)2·4H2O without any added base produces [MnII(HNbip)2(NCS)2]·CH3CN (1·CH3CN). In the presence of NaOH and NH4SCN in MeOH, the cluster [MnII4(μ‐bip)2(μ3‐OH)2(NCS)4] (2), featuring a stepped‐cubane, was obtained through hydroxido‐bridge‐driven dimerization of two μ3‐OH‐bridged [Mn2] fragments derived from 1·CH3CN.
Reaction Medium pH Dependent Existence of Mn
II
Bound [ON] Donor Zwitterionic Chelating Ligand and Self‐Assembly of Hydroxido‐Bridged Mn
II4
Cluster
摘要:
AbstractA mononuclear MnN4O2 complex with two zwitterionic ligands and a centrosymmetric tetranuclear μ3‐OH‐bridged self‐assembled Mn4 cluster were synthesized and characterized by using the [NO(H)N] ligand HOPhbip [2,6‐bis(phenylmethyliminomethyl)‐4‐methylphenol]. The reaction in MeOH in the presence of NH4SCN and a lower stoichiometry of Mn(OAc)2·4H2O without any added base produces [MnII(HNbip)2(NCS)2]·CH3CN (1·CH3CN). In the presence of NaOH and NH4SCN in MeOH, the cluster [MnII4(μ‐bip)2(μ3‐OH)2(NCS)4] (2), featuring a stepped‐cubane, was obtained through hydroxido‐bridge‐driven dimerization of two μ3‐OH‐bridged [Mn2] fragments derived from 1·CH3CN.