| 摘要 |
<p>1350311 Tetra-(bicycloheptyl) transition metal compounds HERCULES Inc 2 Feb 1972 [2 Feb 1971] 4935/72 Heading C2J [Also in Division C3] A compound of formula Y 4 M, where Y is where one R is H or CH 3 and the other Rs are H and each R<SP>1</SP> is H or CH 3 , there being a total of 0-3 CH 3 groups attached to the bicyolic radical, and M is Ti, Zr, Hf, V, Cr, Mn, Fe or Co, is prepared by reacting Li-Y with a salt (especially a halide), ether complex thereof, or an alkoxide of the metal M in an inert atmosphere and in a saturated hydrocarbon diluent at - 78‹ to 100‹ C. In the examples, tetracamphyl chromium and the tetranorbornyl compounds of each of the above metals are prepared. The compounds are useful as polymerization catalysts and also for cross-linking carboxylated polymers.</p> |
