The Synthesis, Characterization and Investigation of the Catalytic Activties of Some L O 5-Cyclooctadiene and 2,5•-Norbornadiene Group Vib Transition Metal C,1rbene Carbonyl Complexes
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Date
1982-06
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Addis Ababa Universty
Abstract
The reaction of l,5-cyclooctadiene tetracarbonyl tungsten
(0) with methyllithium gave products in which the diene
is no more coordinated to the metal. It was investigated that
the compound is catalytically active and could metathesize 2~
pentene into 2-butene and 3-hexene in the presence of EtAlCl 2
as a cocatalyst.
A series of some (diene)U(CO) 4.' :.Jdiene)M(CO} 4 =
(l,5-cyclooctadiene}W(CO}4' (2,S-norbornadiene}W(CO}4'
(2, S-norbornadiene) Mo (CO) 4' (2, S-norbornadiene) Cr (CO) 4 J, and
(CH3CN}3Mo(CO}3 complex were tested in the ratio of M to coca~
talyst to 2--pentene to be 1:0:1000. For comparison the active
fofClO-C2HSOH-C2HSAlCl2 System lJaS used. Gas chromatographic
analysis of the reaction products showed that (2,5-norbornadiene)W(
CO}4 is able to give 59.24% conversion after 24 hours at room
temperature. The other complexes showed different percentage
conversions and (NBD)Cr(CO) 4 was found to be completely inacti1!e
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Keywords
L O 5-Cyclooctadiene and 2,5•-Norbornadiene