Electrochemical, Electron Spin Resonance and Nuclear Magnetic Resonance Investigations of Tertiary Phosphine Complexes of Nickel. Part 1. Mono- and Di-nuclear Nickel Dithiolene and Nickel Dihalide Species

DOI: 10.1039/DT9930003593

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 3593 - 3600 (1993)

Update date:2022-07-30

Topics:

Authors:

Bowmaker, Graham A.

Williams, Julian P.

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

Article abstract of DOI:10.1039/DT9930003593

The synthesis, characterisation and 31P NMR parameters of (PR3)2> (PR3 = PMePh2 or PBuⁿPh2) and of <n> complexes (L-L = ditertiary phosphine containing vinylene or ortho-phenylene interphosphorus linkages, n = 1 or 2, R = CN or Ph) are reported.The 31P NMR data for the <n> complexes show that the ring contribution to the chemical shift is large an positive for the mononuclear species (n = 1) and near zero or negative for the dinuclear species (n = 2).Electrochemical studies of the complexes and ESR studies of their electrogenerated products have shown variations in electrochemical and ESR parameters due to variations in (i) co-ordination ring size, (ii) interphosphorus linkage and (iii) substituent at phosphorus.The ESR spectrum of the redox product identified as >8(+) exhibited two chemically inequivalent 31P nuclei.The dinuclear complexes (n = 2) exhibited multiple redox proceses.The ESR spectra show that the reduction products involve metal-based electron addition to yield the corresponding nickel(I) species, while the oxidation products involve removal of a primarily ligand-based electron.The one-electron reduction product of the complex > shows a spectrum characteristic of a nickel(I) monomer (S = 1/2) at ca. 298 K, but is ESR inactive at ca. 90 K.This is attributed to the reversible formation of a diamagnetic dimer (S = 0) upon freezing.The reduction products of the complexes <2> (X = Cl, Br, I or SCN) exhibit no solution ESR spectra at ca. 298 K, but for X = I a triplet state (S = 1) spectrum at ca. 90 K is observed, characteristic of a dinuclear Ni(I)-Ni(I) species.

Full text of DOI:10.1039/DT9930003593

View Article Online / Journal Homepage / Table of Contents for this issue

View Article Online

Products guided by the article

Product name:{Ni(1,2-diphenylethene-1,2-dithiolato^(2-)-S,S')(C₆H₄(PMe₂)(PPh₂)-1,2)}

Cas No:153148-08-4

R&D Labs maybe for 153148-08-4

Ring Specialty Chemicals Inc.

website:http://www.ringchemicals.com/

Contact:+1-416-493-6870

Address:Toronto, Canada
Goldwills Pharmaceuticals Co., Ltd.

Contact:0916-2237889 13991621155

Address:North Suburb of Hanzhong city, Shaanxi Province
LinHai Cina Chemical Co., LTD.

Contact:0576-85580989

Address:Pharma-chem zone,Duqiao,Linhai,Zhejiang,China
HEBEI BRANT PHARMACEUTICAL

Contact:+86-0311-84455288-844

Address:Mayu Industrial Park, Jinzhou, Hebei, China.
Changzhou Welton Chemical Co., Ltd,

Contact:0086-519-85910828,85920537,85912897

Address:No.8 Jinlong Road, Binjiang Park, Changzhou, Jiangsu, China.

Relevant to this article

Crystal Structure of synthesised together with Other Sandwich Complexes of Tungsten and Molybdenum containing η⁶-C6F6 or η⁶-C6H3F3-1,3,5 Ligands, from Atoms of the Metals

Doi:10.1039/DT9930003097
(1993)
Reversible iodine absorption of nonporous coordination polymer Cu(TCNQ)

Doi:10.1039/c3nj01290e
(2014)
Exploiting protein symmetry to design light-controllable enzyme inhibitors

Doi:10.1002/anie.201307207
()
Enantioselective synthesis of β-hydroxy carboxylic acids: Direct conversion of β-oxocarboxylic acids to enantiomerically enriched β-hydroxy carboxylic acids via neighboring group control

Doi:10.1016/S0957-4166(98)00502-3
(1999)
Synthesis of N-substituted oxazolidines and morpholines

Doi:10.1007/s11167-005-0502-x
(2005)
An efficient synthesis of the C27-C45 fragment of lagunamide A, a cyclodepsipeptide with potent cytotoxic and antimalarial properties

Doi:10.1016/j.tetasy.2013.11.020
(2014)

Article Doi