Synthesis and Crystal Structure of [Mn2(H2sal)2(Hsal)2(H2O)4]. First Example of the Reductive Synthesis of a Binuclear Manganese(I) Salicylate Complex

The synthesis and characterization of the first unique binuclear manganese(I) salicylate complex is described. The structure of the complex is unequivocally established with the help of an X-ray crystallographic study. The structure consists of two [MnO^sub 6^] units, containing octahedral Mn^sup I^ ions, linked together by a bridging salicylato (Hsal^sup -^) ligand and each Mn^sup I^ is chelated with a (H^sub 2^sal) ligand. The complex possesses a metal oxidation state of +1 and is a rare example of a noncarbonyl or cyanide complex of a binuclear Mn^sup I^ species. The effective magnetic moment per binuclear molecule (µ^sub eff.^ at 27 °C is 8.07 µ^sub b^, that also describes the manganese (+1) oxidation state.[PUBLICATION ABSTRACT]