Halide-and Hydride-Bridged Complexes

Related dimeric trihydrides containing various bidentate phosphorus ligands have been prepared by treatment of [PtCl2L2] with AgBF4, fol- 

Complexes containing bridging alkynyls may be prepared from [Pt(C=CH)2(PR3)2] and [PtCl2(PR3)2] in the presence of a secondary amine and a copper(I) chloride catalyst  

Replacement of the terminal chlorides by iodides occurs readily, and the complex [Pt2(/i-C=C)I2(PMe3)4] has been characterized by X-ray diffraction methods (26). 

Addition of PhC=CPh causes displacement of one CO and formation of [Pt2( f-C5H3)2(/t-COX/t-PhC=CPh)]. The reaction of Bu4N[PtCl,(CO)] with 2 equivalents of (CsMes)MgCl-THF generates [Pt2( 5-CJMe3)2-(CO)2], whose molecular structure reveals the presence of terminal CO ligands. Variable temperature, 3C NMR spectroscopy indicates that rapid exchange of CO between platinums occurs in this case also (31). 

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Several patents for the polymerization of ethylene using divalent and trivalent lanthanides have been applied for although details are very sketchy. Workers at Montell Co. filed a very broad patent disclosing the use of lanthanide and transition metal complexes containing polysubstituted ansa-bridged indenyl ligands as catalyst components (presumably in the presence of MAO) for olefin polymerization. Both mononuclear halides and binuclear hydride-bridged spe-... 

Binding energy, pentacarbonyliron, 6, 3 Binuclear complexes bis-Cp titanium halides, 4, 522 with Ni-M and Ni-C cr-bonds heterometallic clusters, 8, 115 homometallic clusters, 8, 111 Binuclear dicarbonyl(cyclopentadienyl)hydridoiron complexes, with rand C5 ligands, 6, 178 Binuclear iridium hydrides, characteristics, 7, 410 Binuclear monoindenyl complexes, with Ti(IV), 4, 397 Binuclear nickel(I) carbonyl complexes, characteristics, 8, 13 Binuclear osmium compounds, with hydrocarbon bridges without M-M bonds, 6, 619... 

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