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    • 34. 再颁专利
    • Metal-organo compounds with sterically exposed metal-metal bonds, and a
method for their production
    • 具有空间暴露的金属 - 金属键的金属有机化合物及其制备方法
    • USRE29368E
    • 1977-08-23
    • US631777
    • 1975-11-13
    • Guido P. Pez
    • Guido P. Pez
    • C07F17/00
    • C07F17/00
    • Metal-organo complex characterized as having at least one sterically exposed metal-metal bond, and having the structure:R.sub.n M M'R.sub.nwherein 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.The 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.degree. 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.The metal-organo complex has utility as an absorbent of nitrogen when present as a contaminant in argon. .Iadd.When 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.