84074-25-9Relevant academic research and scientific papers
Rhodium and iridium amides
Fryzuk, Michael D.,MacNeil, Patricia A.,Rettig, Steven J.
, p. 2469 - 2476 (2008/10/08)
A series of Rh(I) and Ir(I) amide complexes has been prepared and characterized; all of these M(L)-[N(SiMe2CH2PR2)2] (M = Rh, Ir; L = C8H14, C2H4, CO, PMe3, PPh3) species are square-planar with the tridentate amide ligand phosphine donors in a mutually trans disposition. Oxidative addition of CH3I or CH3Br to the M(I) cyclooctene amides results in five-coordinate M(III) derivatives M(CH3)X[N-(SiMe2CH2PR2)2] (M = Rh, Ir; X = I, Br; R = Ph, i-Pr). On the basis of nOe difference 1H NMR experiments and crystallographic data, these M(III) amides are thought to have a square-pyramidal stereochemistry both in the solid state and in solution. Monoclinic Ir(CH3;)I[N(SiMe2CH2P(i-Pr)2) 2] crystallizes in the P21/m space group with Z = 2, a = 9.6295 (7) ?, b = 15.2327 (5) ?, and c = 10.4068 (8) (?); Rw = 0.029. Spectroscopic information regarding the CO adducts M(CO)(CH3)X[N(SiMe2CH2PR2)2], formed by exposure to the M(III) amides to carbon monoxide under ambient conditions, indicates that the five-coordinate complexes maintain their square-pyramidal stereochemistry in solution.
Amides of rhodium and iridium stabilized as hybrid multidentate ligands
Fryzuk, Michael D.,MacNeil, Patricia A.
, p. 355 - 356 (2008/10/08)
A variety of rhodium and iridium amido phosphine derivatives have been isolated and fully characterized. These complexes are exceptionally stable, a unique feature of group 8 transition-metal amides, owing to the incorporation of the amido function as a part of a hybrid ligand. The catalytic homogeneous hydrogenation activity of these rhodium and iridium species has also been investigated.
