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Cone angles coordinated, reactions

By systematic variation of the phosphane ligands it was found that catalysts formed from basic phosphanes with small cone angles gave the highest activity and selectivity. The optimum ligand to metal ratio lies between 1 1 and 2 1. Excess phosphane decreases the catalytic activity drastically, possibly due to the formation of stable coordinative saturated nickel complexes. The catalytic system works in a temperature range between 20 and 120°C, most effectively at 60°C with a low but constant reaction rate over a long time. Furthermore,... [Pg.132]

Phosphorus ligands and CO also react with a variety of Fe(DPPE)2 (25) complexes [DPPE = bis(diphenylphosphino)ethane] such as Fe-(DPPE)2(C2H4) (4) and Fe(DPPE)2H2 (5) to form Fe(DPPE)2L complexes, but the fastest reaction is observed with the ortho-metalated species, 6. Steric limitations are much more severe in the Fe(DPPE)2 systems the largest phosphorus ligand coordinated was P(OMe)2Ph, having a cone angle of 116°. [Pg.70]

See other pages where Cone angles coordinated, reactions is mentioned: [Pg.1199]    [Pg.131]    [Pg.294]    [Pg.156]    [Pg.165]    [Pg.504]    [Pg.1045]    [Pg.147]    [Pg.313]    [Pg.240]    [Pg.13]    [Pg.880]    [Pg.388]    [Pg.441]    [Pg.6]    [Pg.1097]    [Pg.88]    [Pg.323]    [Pg.34]    [Pg.434]    [Pg.136]    [Pg.131]    [Pg.294]    [Pg.189]    [Pg.76]    [Pg.111]    [Pg.880]    [Pg.667]    [Pg.1194]    [Pg.870]    [Pg.254]    [Pg.131]    [Pg.294]    [Pg.33]    [Pg.58]    [Pg.167]    [Pg.886]    [Pg.689]    [Pg.73]    [Pg.41]    [Pg.5261]    [Pg.158]    [Pg.159]    [Pg.547]    [Pg.102]    [Pg.233]    [Pg.63]   
See also in sourсe #XX -- [ Pg.468 , Pg.469 ]



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