Welcome to LookChem.com Sign In|Join Free

Article Doi

Nuclear Magnetic Resonance Investigations of a Novel Intramolecular Methylthio Replacement Process in Palladium(II) and Platinum(II) Complexes of Mixed Sulfur-Phosphine Ligands

DOI: 10.1039/DT9920001073

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1073 - 1080 (1992)

Update date:2022-07-30

Topics:

Authors:

Abel, Edward W.Abel, Edward W.

Dormer, Jonathan C.Dormer, Jonathan C.

Ellis, DavidEllis, David

Orrell, Keith G.Orrell, Keith G.

Sik, VladimirSik, Vladimir

et al.et al.

Read Full Text PDF DownLoad Join now for total 90,000,000 free articles

Article abstract of DOI:10.1039/DT9920001073

A series of palladium(II) and platinum(II) complexes with the mono- and bis-chelate ligands bisphenylphosphine and trisphosphine> have been prepared and characterised.Despite the potential tridenticity of the first ligand it acts as a P/S monochelate to form square-planar complexes of type X2> (M = Pd, X = Cl, Br or I; M = Pt, X = Cl).Variable-temperature one- and two-dimensional NMR spectroscopy showed that pyrimidal inversion of the co-ordinated sulfur atoms was accompanied by an exchange of pendant and bound methylthio groups.The ΔG(excit.) values for both processes were in the range 43-69 kJ mol-1, being strongly metal and halogen dependent.This bis(chelate) complexes 2>2 are also square planar with metal co-ordination involving one phosphorus and one sulfur of each ligand, the other two pairs of SMe groups being unco-ordinated.The X-ray crystal structure of 2>2 shows the co-ordinated S-methyls to be mutually cis with respect to the metallocycle plane.In low-temperature solutions of this complex this cis form is assumed to be predominant.At higher solution temperatures a facile intramolecular exchange of all six methylthio groups occurs.The energy and probable mechanism of this fluxion are reported.

View More

Products guided by the article

Product name:Pd{bis{o-(methylthio)phenyl}phenylphosphino}Br2

Cas No:141446-47-1

141446-47-1

R&D Labs maybe for 141446-47-1

Relevant to this article

Hot Product