Concerning the molecular and electronic structure of a tungsten-tungsten quadruply bonded complex supported by two 6-carboethoxy-2-carboxylatoazulene ligands
The preparation and molecular structure of a W2(4+)-quadruply bonded complex is reported wherein two mutually trans azulene-2-carboxylato ligands are shown to be strongly coupled by ligand pi-M2delta-ligand pi conjugation.