Metal-organo compounds with sterically exposed metal-metal bonds, and a method for their production

摘要

Metal-organo complex characterized as having at least one sterically exposed metal-metal bond, and having the structure: ##EQU1## WHEREIN R represents a ligand which may contain one or more atoms of carbon, hydrogen, oxygen, nitrogen, sulfur or phosphorus; n is an integer of from 1 to 3; M and M' each represent the same or a different transition metal; and the symbol represents at least one sterically exposed metal-metal bond.PPThe preparative method involves the low temperature reaction between an alkali metal naphthalene in an ethereal solvent, with the dihalogenide of at least one metal- organic species. The reaction mixture is allowed to slowly warm to ambient temperatures, the solvent is evaporated, and the naphthalene sublimed at temperatures below 40° C. The remaining crude product is extracted with an organic solvent, the extract is separated from the insoluble portion, and the product recovered by evaporating the solvent. PPThe metal- organo complex has utility as an absorbent of nitrogen when present as a contaminant in argon. .Iadd.P PWhen M and M' in the above formula are both titanium, and R is cyclopentadienyl, and n is 2 the above preparative method results in a metal-organo complex, as above defined, wherein pairs of the ligands are pi-bonded to each titanium atom, and one of these four ligands bridges the two titanium atoms by a pi- bond to one titanium and a sigma-bond to the other. .Iaddend.