Benzenedicarbonyl and benzenetricarbonyl linker pyrazolyl complexes of palladium(ii): synthesis, X-ray structures and evaluation as ethylene polymerisation catalystsElectronic supplementary information (ESI) available: molecular structures and bond lengths and angles for L2, L3, L6 and 2. See http://www.rsc.org/suppdata/dt/b2/b208376k/
Guzei, Ilia A.; Li, Kelin; Bikzhanova, Galina A.; Darkwa, James; Mapolie, Selwyn F.; Guzei Ilia A.; Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue; Li Kelin; Department of Chemistry, University of the Western Cape; Bikzhanova Galina A.; Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue; Darkwa James; Department of Chemistry, University of the Western Cape; Mapolie Selwyn F.; Department of Chemistry, University of the Western Cape
Журнал:
Dalton Transactions
Дата:
2003
Аннотация:
A series of novel compounds with pyrazolyl rings (pz) linked by benzenedicarbonyl (L1â L4) and benzenetricarbonyl (L5, L6) have been prepared and structurally characterized. The mutual orientation of their rings was studied by molecular mechanics. These polydentate species react with PdCl2(NCMe)2 to yield dinuclear complexes in which the Pd centers coordinate to one or two pz units, a terminal chloride and two bridging chloride ligands. In complex [{(3,5-<sup>t</sup>Bu2pzCO)3-1,3,5-C6H4}Pd2Cl2(µ-Cl)2]4 the pyrazolyl ligand L5 acts as a bidentate donor despite the presence of the third pz group. These Pd complexes, when activated with methylaluminoxide (MAO), exhibit activity in ethylene polymerization.
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