The oxidative addition of iodomethane to acetylacetonatocarbonylphosphinerhodium(I) complexes

Reactivity of cationic methyl rhodium(III) complexes cis-[Rh(β-diket)(PPh3)2(CH3)(CH3CN)][BPh4] toward ligands of different character: pyridine, carbon monoxide, and triphenylphosphine

“…With this assumption, we studied the IR and NMR spectra of residues obtained by evaporation of dichloromethane solutions of 2 and 3 after 24 h storage. As expected, the IR spectra of these mixed products (in CH 2 Cl 2 ), alongside with acetyl m(CO) absorption bands of initial 2 and 3 at 1726 and 1728 cm À1 , contained m(CO) bands at 2060 and 2058 cm À1 , respectively, which are characteristic of terminal carbonyl ligands in rhodium(III) complexes [3,5,8,9,[11][12][13][14][15][16][17]27,28].…”

“…As the isomerization of rhodium(III) acyl complexes into alkyl carbonyl complexes R-CðOÞ-RhL n ! R-RhðCOÞL n is a well-documented phenomenon [9,11,12,24,26,27], we assumed that the new signals belong to the products of this kind. With this assumption, we studied the IR and NMR spectra of residues obtained by evaporation of dichloromethane solutions of 2 and 3 after 24 h storage.…”

“…4 ð5Þ the process seems to include only the methyl ligand migration within the equatorial plane, and moreover, the presence of b-diketonate ligand with a bite angle value of $90° [6,[29][30][31][32][33][34][35][36] could facilitate this migration making two other equatorial angles more capacious then in the ideal tbp [37]. Observed incompleteness of the isomerization reactions for 24 h may be caused either by equilibrium between acyl and methyl carbonyl complexes [9,24,26,27] or by kinetic reasons. A prolonged examination of these reactions is hindered by a further transformation of carbonyl complexes that produce a number of new signals from unidentified products in NMR spectra of reaction mixtures.…”

Crystal structure of monocarbonyl(N-nitroso-N-oxido-phenylamine-κ2 O,O′)(triphenylarsine-κAs)rhodium(I), C25H20AsN2O3Rh

“…Rh(I)Cupf-complexes have, therefore, been studied in detail [3][4][5][6]. In this study we have prepared the RhCupf(CO)AsPh 3 complex to further evaluate electronic and steric in uences on the oxidative addition of iodomethane.…”

Crystal structure of (Z)-4,4,4-trifluoro-3-((2-hydroxyphenyl)amino)-1- (thiophen-2-yl)but-2-en-1-one, C14H10F3NO2S

“…The b-ketoiminate complexes have drawn interest because of their higher thermalstability [7]than the b-diketonate analogues and their versatility, by changing the imine substituents,f or tailoring their reactivity and volatility [7][8][9][10][11].The condensation of equimolar amounts of the 1,3-diketone and 2-aminophenol in ethanol afforded the phenolimino-ketone ligand. The spectroscopic data well accounted for the enol form of the ligand [15].…”