Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1975-02-12
1976-07-13
Sneed, Helen M. S.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
252431R, 2604293, 2604295, 2604385R, C07F 900, C07F 728, C07F 1100
Patent
active
039693864
ABSTRACT:
Organometallic compounds of the general formula L.sub.r M(CH.sub.2 SiR.sup.1 R.sup.2 R.sup.3).sub.m (1) where M is a transition metal of Groups IIIA to VIA of the Periodic Table of Elements, m is an integer from 1 to the prevailing valency of the metal M, L.sub.r represents the sum of any other incidental ligands attached to the metal M, r being 0 or an integer, and R.sup.1, R.sup.2 and R.sup.3 represent substituted or unsubstituted hydrocarbyl groups or hydrogen atoms, at least one of said groups having the general formula ##SPC1##
Where n is an integer from 1 to 5 and Y is a group capable of donating electrons to the metal M are useful as catalysts for olefin polymerization. The compounds may be used as catalysts alone or when supported upon a matrix for example of alumina. Particularly useful compounds are those in which the transition metal M has a valency lower than the maximum valency for that metal.
REFERENCES:
patent: 3763197 (1973-10-01), Collier et al.
patent: 3813423 (1974-05-01), Pioli et al.
Ballard Denis George Harold
Ibekwe Samuel Dimewere
Lappert Michael Franz
Parkins Adrian Walter
Pearce Ronald
Imperial Chemical Industries Limited
Sneed Helen M. S.
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