|Title:||The Synthesis, Characterization and Investigation of the Catalytic Activities of Some 1,5-Cyclooctadiene and 2,5-Norbornadiene Group VIB Transition Metal Carbene Carbonyl Complexes|
|???metadata.dc.contributor.*???:||Dr. Makonnen Dilgassa|
|Publisher:||Addis Ababa University|
|Abstract:||The reaction of 1,5-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 '6-hexene in the presence of EtAlCl2 as a cocatalyst. A series of some (diene)M(CO)4 ,[ (diene)M(CO)4 =(1j 5cyclooctadiene)W(CO)4 (2,5-norbornadiene)W(CO)4, ( 2, 5-norbornadiene)M0(CO)4, (2,5-norbornadiene)Cr(CO)4], and (CH3CN)3M0(CO)3 complex were tested in the ratio of M to cocatalyst to 2-pentene to be 1:6:1000. For comparison the active WCl6~C2H50H-C2H5AICI 2 System was 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 inactive.|
|Description:||A Dissertation Submitted to the School of Graduate Studies Addis Ababa University in Partial Fulfillment of the Requirements for the Degree of Master of Science in Chemistry|
|Appears in Collections:||Thesis - Chemistry|
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