108366-60-5Relevant academic research and scientific papers
Preparation, properties, and reactivity of dihydridosilyl(η4-cycloocta-1,5-diene)iridium(III) complexes. X-ray crystal structures of the dihydrido silyl complex IrH2(SiEt3)(η4-C8H 12)(AsPh3) and the cyclooctenyl derivative Ir(1-σ,4,5-η2-C8H ...
Fernández, Maria J.,Esteruelas, Miguel A.,Oro, Luis A.,Apreda, Maria-Carmen,Foces-Foces, Concepción,Cano, Felix H.
, p. 1751 - 1756 (2008/10/08)
Full title: Preparation, properties, and reactivity of dihydridosilyl(η4-cycloocta-1,5-diene)iridium(III) complexes. X-ray crystal structures of the dihydrido silyl complex IrH2(SiEt3)(η4-C8H 12)(AsPh3) and the cyclooctenyl derivative Ir(1-σ,4,5-η2-C8H13)(CO) 2(AsPh3). The synthesis, properties, and reactivity of the dihydridosilyl(η4-cycloocta-1,5-diene)iridiura(III) complexes IrH2(SiR3)(cod)L (SiR3 = SiEt3 or SiMe2Ph; cod = cycloocta-1,5-diene; L = PPh3 or AsPh3) are described. They are prepared by reaction of [Ir(μ-OMe) (cod)]2 with L and HSiR3. The IrH2(SiR3) (cod)L complexes undergo silyl exchange on reaction with HSiR′3 and reductive elimination of HSiR3 on treatment with PPh3. Reaction of IrH2(SiEt3)(cod)(AsPh3) with CO affords white crystals of Ir(1-σ,4,5-η2-C8H13)(CO) 2(AsPh3). Two representative (triphenylarsine)iridium complexes have been characterized by X-ray diffraction. IrH2(SiEt3)(η4-C8H 12)(AsPh3): monoclinic, space group P21/n, Z = 4, a = 14.8007 (6) A?, b = 19.3871 (9) A?, c = 11.1029 (3) A?, β = 110.445 (2)°. Ir(1-σ,4,5-η2-C8H13)(CO) 2(AsPh3): monoclinic, space group P21/n, Z = 4, a = 16.2962 (11) A?, b = 16.5549 (10) A?, c = 9.3819 (3) A?, β = 97.761 (5)°. The structures were solved by Patterson and difference direct methods and refined to conventional agreement factors equal to 0.043 and 0.055, respectively. The coordination around iridium is distorted octahedral for the first compound with a As-Ir-Si angle of 133.40 (4)°, and, for the second one it is slightly distorted trigonal-bipyramidal, with a σ(Ir-C,cyclooctenyl) distance of 2.150 (11) A?.
