Synthesis and structure of V(V) and Mn(III) NHC complexes supported by a tridentate bis-aryloxide-N-heterocyclic carbene ligand

Vanadium (V) and manganese (III) metal complexes (2, [tBu(OCO)]V(double bond; length as m-dashO)Cl; 3, [tBu(OCO)]Mn(acac)), which are supported by a tridentate bis-aryloxide-N-heterocyclic carbene ligand ([tBu(OCO)]2−double bond; length as m-dash[η3-O,C,O-{(3,5-di-tert-butyl-C6H2O)2N2C3H4}]2−) have been prepared and structurally characterized. Both complexes were efficiently synthesized in a straightforward and smooth manner involving the direct reaction of the imidazolinium proligand 1,3-bis(3,5-di-tert-butyl-2-hydroxyphenyl)imidazolinium chloride 1, easily accessible in a two-step synthesis with an overall good yield, with (iPrO)3Vdouble bond; length as m-dashO and Mn(acac)3, respectively.