Carbonylation of methanol at unusually low temperature and pressure with cis-RhCl(CO)2Ph2P(CH2)2P(O)Ph2

Abstract

c ~s -R ~C I ( C O ) ~P ~~P ( C H ~) ~P ( O ) P ~~, the only species observed during catalysis, formed from cis-hhCI(CO)Ph2P(CH2P(~)Ph2 and CO, is the sole active species observed during catalytic studies and results in the carbonylation of methanol with catal st turnover frequencies approaching 400 h-1 at 80°C and 50 psig CO; the crystal structure of the analogue cis-hCI(CO)Ph2PCH2P(0)Ph2 is reported.

Dicarbonylrhodium(I) complexes of aminophenols and their catalytic carbonylation reaction

“…During 60 min of reaction time (Table 2), 54.54, 65.08 and 53.70% conversions of methanol were obtained with corresponding turn over number (TON) 812, 1004 and 828 for the complexes 1a, 1b and 1c, respectively, which further increases with the increase in reaction time. In general, for a particular reaction time and conditions, complexes 1 show higher catalytic activity over the wellknown catalyst precursor [Rh(CO) 2 …”

“…The rhodium dimer, [Rh(CO) 2 Cl] 2 , reacts with two molar equivalent of the ligands a-c to give the complexes of the type [Rh(CO) 2 ClL](1), where L = 2-aminophenol (a), 3-aminophenol (b) and 4-aminophenol (c) (Scheme 1). Elemental analyses of the complexes were determined and the results match well with the calculated values.…”

“…− generated in situ from [Rh(CO) 2 Cl] 2 . 42 It has been observed that the efficiency of the catalyst precursors 1 are different and found to follow the order 1b > 1c > 1a.…”

“…All the complexes were synthesized from [Rh(CO) 2 Cl] 2 , which was prepared by passing CO gas over RhCl 3 .3H 2 O at 100…”

Synthesis, crystal structures and spectra of Hg(II)-1,2-bis(diphenylphosphino)ethane monoxide complexes: Monomer and polymer formation

“…Transition metal complexes of these ligands have attracted much attention due to their versatile coordination chemistry and their application in catalysis [3][4][5]. Grim et al [6] have reported complexes of Ph 2 PCH 2 P(O)Ph 2 and Ph 2 P(O)CH(Pr)PPh 2 (Pr = n-propyl) with HgX 2 (X = Cl, Br).…”