Synthesis and transition metal chemistry of a bridging diphosphinite, 1,4 bis(diphenylphosphinoxy)benzene

Selective hydroaminomethylation of olefins using simple and efficient Rh–phosphinite complex catalyst

“…Yield 69% (0.067 g, 0.069 mmol). Characterization results of ligand and metal complex are in accordance with literature data . TGA of the Rh–phosphinite catalyst showed that the catalyst was thermally stable at the reaction temperature.…”

“…The Rh–phosphinite complex used was prepared according to the reported procedure in the literature . 31 P and 1 H NMR analysis of the diphosphinite ligand and Rh complex were carried out using a Varian 400 MHz instrument.…”

A Versatile Approach to Access Trimetallic Complexes Based on Trisphosphinite Ligands

“…This solid could be conveniently washed with hexane and dissolved in CDCl3 to be characterized by NMR spectroscopy, though subtle variations in temperature or concentration caused the formation of less tractable viscous solutions. Distinctive 31 P{ 1 H} NMR resonances were recorded at 112.8 (2a), 120.6 (3a), and 96.1 (4a) ppm, in agreement with previous related compounds [49,50], while 1 H NMR spectra did not reveal unusual patterns. A distinctive feature that remains constant along all the compounds studied in this work is the decrease in the scalar coupling constant 1 JCP of the carbon centers directly bound to the phosphorus nuclei upon metal coordination.…”

“…At variance, reaction with CuCl, led to the formation of an insoluble white solid upon concentration of the resulting dichloromethane solution under vacuum. This may result from the formation of a coordination polymer (4a) based on the binding of two phosphinite ligands to each of the copper atoms, as previously reported for polydentate phosphines [45][46][47][48], and even for a related bisphosphinite ligand [49]. This solid could be conveniently washed with hexane and dissolved in CDCl 3 to be characterized by NMR spectroscopy, though subtle variations in temperature or concentration caused the formation of less tractable viscous solutions.…”

Ruthenium complexes of diphenylphosphino derivatives of carboxylic amides: Synthesis and characterization of bidentate P,N- and P,O-chelate ligands and their reactivity towards [RuCl2(PPh3)3]

“…This is in accord with the lower steric demand of the phthalimidine anion because of the N atom being In contrast to 1a and 1b, compound 1c features a P−O bond. This is evident from a characteristic downfield shift of the 31 P NMR signal, which emerges around 100 ppm and is characteristic of a Ph 2 P-O-aryl moiety (like in Ph 2 P-O-p-C 6 H 4 -O-PPh 2 , δ 31 P = 110.5 ppm) [28]. Also, only for one carbon atom (C1) 2 J P,C coupling is observed, and the single-crystal X-ray structure (Fig.…”