Thienyl carboxylate ligands bound to M2 quadruple bonds involving molybdenum and tungsten. Models for dimetallated polythiophenes.
Thienyl-carboxylate and -dicarboxylate groups attached to dinuclear centers (M = Mo or W) having MM quadruple bonds show interesting electronic properties and provide insight into the probable nature of related dimetallated polythiophenes.