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Phosphine, iridium complex preparation

Although a general route for the preparation of carbonylhalobis((ert-phosphine)-iridium(I) complexes has been reported, it is somewhat inconvenient for complexes of highly basic ligands (e.g., trimethyl- or dimethylphenylphosphine), since the two-step sequence required and the high solubility of the products (particularly for the P(CH3)3 complex) result in low yields. A more effici-... [Pg.63]

Tetrahydrido(i -pentamethylcyclopentadienyl)iridium was synthesized in 1982, and proved to be a useful precursor for several iridium complexes of varied oxidation state.The tetrahydride and its derivatives are among the very few iridium(V) polyhydrides that do not contain phosphine ligands. No alternative preparation of the title complex has been reported. The key feature of the synthesis described here is the oxidation of the iridium(III) intermediate to the iridium(V) product during work-up of the reaction mixture. ... [Pg.19]

P2C2HI6, Phosphine, 1,2-ethanediyl-bis(dimethyl-, iridium complex, 21 100 PjCtHu, Phosphine, ethylenebis(dimethyl-, hazards in preparation of, 23 199 P hHb, Phosphine, methylenebis(diphenyl-, palladium and rhodium complexes, 21 47-49 P kHk, Phosphine, 1,2-ethanediyl-bis(diphenyl-, iron complexes, 21 91-94 molybdenum and tungsten complexes, 23 10-13... [Pg.251]

Note added in proof In the preparation of rhodium and iridium complexes from cyclo-octa-1,5-diene, however, all the uncomplexed olefin is converted to the 1,3-diene. The same isomerization is catalyzed by tertiary phosphine complexes of rhodium and iridium, and the 1,4-diene can be detected as an intermediate (117a). [Pg.373]

CPDN 394 is an important intermediate for the synthesis of corannulene 23 it can be prepared by [2-F2-F1] reaction of 1,8-diethynylnaphthalene 395 using Fe(CO)5 upon demetallation procedure (Scheme 6.97) [235]. Later, Shibata reported the iridium complex-catalyzed carbonylative alkyne-alkyne coupling, which provides 394 in high isolated yields without demetallation procedure. The iridium phosphine complexes, [IrCl(CO)2(PPh3)2l enables the catalytic coupling under carbon monoxide at atmospheric pressure or less (Scheme 6.97) [236]. [Pg.214]

The best characterized complexes [146] are prepared as shown in Figure 2.83. In synthesis (a) the first step involves demethylation of both ligands only one phosphine chelates, demonstrating the stability of square planar d8 iridium(I) on oxidation, the CO is displaced (as C02) and both ligands chelate. [Pg.145]

A considerable number of the tertiary phosphine and arsine complexes of iridium(III) have been synthesized [4, 8] they generally contain 6-coordinate iridium and are conventionally prepared by refluxing Na2IrCl6 with the phosphine in ethanol or 2-methoxyethanol [154]... [Pg.148]


See other pages where Phosphine, iridium complex preparation is mentioned: [Pg.187]    [Pg.106]    [Pg.113]    [Pg.305]    [Pg.1073]    [Pg.11]    [Pg.128]    [Pg.21]    [Pg.412]    [Pg.173]    [Pg.161]    [Pg.1107]    [Pg.1162]    [Pg.486]    [Pg.1842]    [Pg.1857]    [Pg.216]    [Pg.305]    [Pg.73]    [Pg.148]    [Pg.165]    [Pg.485]    [Pg.1841]    [Pg.1856]    [Pg.1107]    [Pg.4561]    [Pg.265]    [Pg.295]    [Pg.116]    [Pg.61]    [Pg.241]    [Pg.357]    [Pg.427]    [Pg.402]    [Pg.192]    [Pg.11]    [Pg.181]    [Pg.1121]    [Pg.1129]    [Pg.5]    [Pg.152]   
See also in sourсe #XX -- [ Pg.23 , Pg.199 ]

See also in sourсe #XX -- [ Pg.23 , Pg.199 ]




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