13C, 15N and 31P NMR study of the disproportionation of cyanogold(I) complexes: [R3PAu13C15N]

Anvarhusein A. Isab; M. Sakhawat Hussain; M. Naseem Akhtar; M. I.M. Wazeer; A. Rahman Al-Arfaj

doi:10.1016/S0277-5387(98)00441-0

¹³C, ¹⁵N and ³¹P NMR study of the disproportionation of cyanogold(I) complexes: [R₃PAu¹³C¹⁵N]

Anvarhusein A. Isab
, M. Sakhawat Hussain^*
, M. Naseem Akhtar
, M. I.M. Wazeer
, A. Rahman Al-Arfaj

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

The disproportionation of cyanogold(I) complexes of general formula [R₃PAu¹³C¹⁵N] forming [(R₃P)₂Au]⁺ and [Au(¹³C¹⁵N)₂]^- ions has been investigated using ¹³C, ¹⁵N and ³¹P NMR spectroscopy for a series of phosphines with R=cyclohexyl, i-propyl, Et, Me, cyclohexyl/diphenyl, o-tolyl, p-tolyl, m-tolyl, p-tolyl/diphenyl, allyl/diphenyl, phenyl, tri(cyanoethyl) CEP, and 1-naphthyl. The ¹³C NMR of the ¹³C¹⁵N group in these complexes exhibited two distinct resonances, one due ¹³C in the starting [R₃PAu¹³C¹⁵N] complex and the second in the [Au(¹³C¹⁵N)₂]^- anion. The ³¹P NMR spectra revealed two ³¹P resonances due to [R₃PAu¹³C¹⁵N] complex, and the [(R₃P)₂Au]⁺ cation. The ¹⁵N NMR revealed only an averaged resonance due to [R₃PAu¹³C¹⁵N] and [Au(¹³C¹⁵N)₂]^- anion, except in the cases of [Me₃PAu¹³C¹⁵N] and [Et₃PAu¹³C¹⁵N] where two resonances were observed. The coupling constants, ¹J(¹³C-¹⁵N), ²J(³¹P-¹³C) and ³J(³¹P-¹⁵N) were obtained for all complexes and the free energies of activation for ligand disproportionation were determined using ³¹P-{¹H} NMR band shape analysis.

Original language	English
Pages (from-to)	1401-1409
Number of pages	9
Journal	Polyhedron
Volume	18
Issue number	10
DOIs	https://doi.org/10.1016/S0277-5387(98)00441-0
State	Published - 26 Mar 1999

Bibliographical note

Funding Information:
We are thankful to the Research Committee of KFUPM Dhahran, Saudi Arabia for supporting this research through project (CY/CYANIDE/175).

Keywords

Cyanogold(I) complexes
Disproportionation
NMR of gold phosphine complexes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/S0277-5387(98)00441-0

Cite this

@article{be2b3a5573204dac844c737621e0a5c8,

title = "13C, 15N and 31P NMR study of the disproportionation of cyanogold(I) complexes: [R3PAu13C15N]",

abstract = "The disproportionation of cyanogold(I) complexes of general formula [R3PAu13C15N] forming [(R3P)2Au]+ and [Au(13C15N)2]- ions has been investigated using 13C, 15N and 31P NMR spectroscopy for a series of phosphines with R=cyclohexyl, i-propyl, Et, Me, cyclohexyl/diphenyl, o-tolyl, p-tolyl, m-tolyl, p-tolyl/diphenyl, allyl/diphenyl, phenyl, tri(cyanoethyl) CEP, and 1-naphthyl. The 13C NMR of the 13C15N group in these complexes exhibited two distinct resonances, one due 13C in the starting [R3PAu13C15N] complex and the second in the [Au(13C15N)2]- anion. The 31P NMR spectra revealed two 31P resonances due to [R3PAu13C15N] complex, and the [(R3P)2Au]+ cation. The 15N NMR revealed only an averaged resonance due to [R3PAu13C15N] and [Au(13C15N)2]- anion, except in the cases of [Me3PAu13C15N] and [Et3PAu13C15N] where two resonances were observed. The coupling constants, 1J(13C-15N), 2J(31P-13C) and 3J(31P-15N) were obtained for all complexes and the free energies of activation for ligand disproportionation were determined using 31P-\{1H\} NMR band shape analysis.",

keywords = "Cyanogold(I) complexes, Disproportionation, NMR of gold phosphine complexes",

author = "Isab, \{Anvarhusein A.\} and Hussain, \{M. Sakhawat\} and Akhtar, \{M. Naseem\} and Wazeer, \{M. I.M.\} and Al-Arfaj, \{A. Rahman\}",

note = "Funding Information: We are thankful to the Research Committee of KFUPM Dhahran, Saudi Arabia for supporting this research through project (CY/CYANIDE/175).",

year = "1999",

month = mar,

day = "26",

doi = "10.1016/S0277-5387(98)00441-0",

language = "English",

volume = "18",

pages = "1401--1409",

journal = "Polyhedron",

issn = "0277-5387",

number = "10",

}

TY - JOUR

T1 - 13C, 15N and 31P NMR study of the disproportionation of cyanogold(I) complexes

T2 - [R3PAu13C15N]

AU - Isab, Anvarhusein A.

AU - Hussain, M. Sakhawat

AU - Akhtar, M. Naseem

AU - Wazeer, M. I.M.

AU - Al-Arfaj, A. Rahman

N1 - Funding Information: We are thankful to the Research Committee of KFUPM Dhahran, Saudi Arabia for supporting this research through project (CY/CYANIDE/175).

PY - 1999/3/26

Y1 - 1999/3/26

N2 - The disproportionation of cyanogold(I) complexes of general formula [R3PAu13C15N] forming [(R3P)2Au]+ and [Au(13C15N)2]- ions has been investigated using 13C, 15N and 31P NMR spectroscopy for a series of phosphines with R=cyclohexyl, i-propyl, Et, Me, cyclohexyl/diphenyl, o-tolyl, p-tolyl, m-tolyl, p-tolyl/diphenyl, allyl/diphenyl, phenyl, tri(cyanoethyl) CEP, and 1-naphthyl. The 13C NMR of the 13C15N group in these complexes exhibited two distinct resonances, one due 13C in the starting [R3PAu13C15N] complex and the second in the [Au(13C15N)2]- anion. The 31P NMR spectra revealed two 31P resonances due to [R3PAu13C15N] complex, and the [(R3P)2Au]+ cation. The 15N NMR revealed only an averaged resonance due to [R3PAu13C15N] and [Au(13C15N)2]- anion, except in the cases of [Me3PAu13C15N] and [Et3PAu13C15N] where two resonances were observed. The coupling constants, 1J(13C-15N), 2J(31P-13C) and 3J(31P-15N) were obtained for all complexes and the free energies of activation for ligand disproportionation were determined using 31P-{1H} NMR band shape analysis.

AB - The disproportionation of cyanogold(I) complexes of general formula [R3PAu13C15N] forming [(R3P)2Au]+ and [Au(13C15N)2]- ions has been investigated using 13C, 15N and 31P NMR spectroscopy for a series of phosphines with R=cyclohexyl, i-propyl, Et, Me, cyclohexyl/diphenyl, o-tolyl, p-tolyl, m-tolyl, p-tolyl/diphenyl, allyl/diphenyl, phenyl, tri(cyanoethyl) CEP, and 1-naphthyl. The 13C NMR of the 13C15N group in these complexes exhibited two distinct resonances, one due 13C in the starting [R3PAu13C15N] complex and the second in the [Au(13C15N)2]- anion. The 31P NMR spectra revealed two 31P resonances due to [R3PAu13C15N] complex, and the [(R3P)2Au]+ cation. The 15N NMR revealed only an averaged resonance due to [R3PAu13C15N] and [Au(13C15N)2]- anion, except in the cases of [Me3PAu13C15N] and [Et3PAu13C15N] where two resonances were observed. The coupling constants, 1J(13C-15N), 2J(31P-13C) and 3J(31P-15N) were obtained for all complexes and the free energies of activation for ligand disproportionation were determined using 31P-{1H} NMR band shape analysis.

KW - Cyanogold(I) complexes

KW - Disproportionation

KW - NMR of gold phosphine complexes

UR - https://www.scopus.com/pages/publications/0001356359

U2 - 10.1016/S0277-5387(98)00441-0

DO - 10.1016/S0277-5387(98)00441-0

M3 - Article

AN - SCOPUS:0001356359

SN - 0277-5387

VL - 18

SP - 1401

EP - 1409

JO - Polyhedron

JF - Polyhedron

IS - 10

ER -