Highly electron-deficient and less sterically-hindered phosphine ligands with two or three 1,3,5-triazinyl groups on the phosphorus atoms have been synthesized and examined in transition metal-catalyzed reactions for the first time. Due to the lack of any hydrogens or substituents at ortho-positions of the 1,3,5-triazine towards the phosphorous atom, it is considered that the steric hindrance of the
N′N′N pincer and N′N bidentate(pyrazolylpyridyl) Rh(I) complexes as catalyst precursors for hydroformylation of olefins
作者:Noluthando V. Gamede、Tsitsi A. Kapfunde、Edward Ocansey、Denis M. Ngumbu、James Darkwa、Banothile C. E. Makhubela
DOI:10.1007/s11243-019-00350-2
日期:2020.1
process has been used for many years in the production of aldehydes from alkenes. Different metals have been used as efficient catalysts for hydroformylation, in which linear and branched aldehydes are the products obtained; therefore, the development of new catalysts for hydroformylation with high selectivity to aldehydes is important. Rhodium complexes 6–9 were synthesized using [RhCl(CO)2]2, or [RhCl(COD)]2
Unsymmetrical Bisphosphines for the Amidation of Aryl Chlorides: A Kinetic Study
作者:Florian C. Falk、Peter Oechsle、Werner R. Thiel、Constantin-Gabriel Daniliuc、Jan Paradies
DOI:10.1002/ejoc.201400159
日期:2014.6
palladium-catalyzed amidation of 4-chlorotoluene with benzamide in the presence of unsymmetrical bisphosphines was investigated. Isostructural [2.2]paracyclophane-derived bisphosphines bearing dicyclohexylphosphino and diarylphosphino moieties were investigated as ligands in the oxidative addition and reductive elimination by kineticstudies. The reductive elimination was accelerated when a bisphosphine ligand
Synthesis, reactivities, and electrochemical properties of pyridinecarboxamide complexes of rhodium(III) and iridium(III). Crystal structure of [Rh(bpb)(py)2]ClO4[H2bpb = 1,2-bis(2-pyridinecarboxamido)benzene, py = pyridine]
作者:Shing-Tat Mak、Vivian Wing-Wah Yam、Chi-Ming Che、Thomas C. W. Mak
DOI:10.1039/dt9900002555
日期:——
potentials are affected dominantly by the charge effect but are relatively independent of the nature of the central metal ions and axial ligands. On the contrary, [Rh(bpe)R]·H2O complexes [R = Me or Et; H2bpe = 1,2-bis(2-pyridinecarboxamido)ethane] can only be oxidized irreversibly at a potential of about 0.3 V more anodic than that of the corresponding bpb complexes. The involvement of the equatorial ligand