Accession Number : AD0163891


Title :   Polychlorinated Metallocenes and Their Synthesis.


Descriptive Note : Patent,


Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C


Personal Author(s) : Hedberg,Frederick L. ; Rosenberg,Harold


Report Date : 18 JUL 1972


Pagination or Media Count : 9


Abstract : The patent concerns novel polychlorinated metallocenes that have the following formulas: C5H(5-m)Cl(m)MC5H5 and (C5H(5-n)Cl(n))2M, wherein M is iron, ruthenium or osmium, m is an integer from 3 to 5, inclusive, and n is an integer from 2 to 5, inclusive. The products are prepared by reacting a monochlorometallocene or a 1,1'-dichlorometallocene with an organolithium compound in the presence of a solvent, recovering a 1-chloro-2-lithiometallocene or a 1,1'-dichloro-2,2'-dilithiometallocene, and then reacting one of the latter compounds with a chlorination agent to obtain 1,2-dichlorometallocene or 1,1',2,2'-tetrachlorometallocene. The lithiation step and the chlorination step can then be repeated. The polychlorinated metallocenes are useful in preparing metallocene-containing polymers that are particularly suitable as ablative plastics. They also can be used to synthesize high temperature and/or high density fluids as well as for additives for lubricants and as flame retardant additives.


Descriptors :   (*PATENTS, METALORGANIC COMPOUNDS), (*METALORGANIC COMPOUNDS, *CHLORINATION), (*FERROCENES, CHLORINATION), HALOGENATED HYDROCARBONS, CHLORINE COMPOUNDS, SYNTHESIS(CHEMISTRY), CHROMIUM COMPOUNDS, OSMIUM COMPOUNDS, THERMAL STABILITY


Subject Categories : ORGANIC CHEMISTRY


Distribution Statement : APPROVED FOR PUBLIC RELEASE