Maree P. Collis, Patrick Perlmutter, Raghunath Vitthal Chaudhari
2007
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Abstract
[17185-29-4] C55H46OP3Rh (MW 918.79) InChI = 1S/3C18H15P.CO.Rh.H/c3*1-4-10-16(11-5-1)19(17-12-6-2-7-13-17)18-14-8-3-9-15-18;1-2;;/h3*1-15H;;; InChIKey = AACIZACVKFEETJ-UHFFFAOYSA-N (catalyst for hydroformylation, hydrogenation, isomerization, hydrosilylation of alkenes, thioformylation, CC and CH bond activation, etc. It has also been used as a carbonylation catalyst, as a catalyst for the conjugate addition of activated Michael donors, domino hydroformylation/Knoevenagel/hydrogenation reactions) Alternate Names: hydridocarbonyltris(triphenylphosphine)rhodium(I); carbonyltris(triphenylphosphine)rhodium(I) hydride. Physical Data: mp 172–174 °C (under N2), 120–122 °C (in air).2 Solubility: moderately sol CHCl3, CH2Cl2, and C6H6; sparingly sol cyclohexane; insol light petroleum and EtOH.1, 3 Form Supplied in: yellow solid, widely available. Preparative Methods: can be prepared from RhCl3·3H2O, PPh3, and formaldehyde (see cautionary note below).2, 4 It can also be prepared from other rhodium complexes,1 for example, by the reaction of hydrazine with trans-carbonylchlorobis(triphenylphosphine)rhodium(I) in ethanolic solution. [HRh(PPh3)3(CO)] can also be prepared by69 heating trans-[Rh(HCOO)(PPh3)2(CO)] in isopropanol in the presence of excess PPh3 in 89% yield. This reaction provides a new and attractive method of synthesis of [HRh(CO)PPh3)3]. The deuteride analog, [DRh(CO)(PPh3)3], was also prepared by this method. Handling, Storage, and Precautions: is moisture sensitive and decomposes in many solvents above 80 °C. The preparation of the complex from RhCl3·3H2O, PPh3, and formaldehyde (see above) results in the liberation of HCl which can react with formaldehyde to form the potent carcinogen bis(chloromethyl) ether.