Synthesis of cyano(selenone)gold(I) complexes and investigation of their scrambling reactions using 13C and 15N NMR spectroscopy

Saeed Ahmad; Anvarhusein A. Isab; Abdul Rahman Al-Arfaj; Alan P. Arnold

doi:10.1016/S0277-5387(02)01152-X

Synthesis of cyano(selenone)gold(I) complexes and investigation of their scrambling reactions using ¹³C and ¹⁵N NMR spectroscopy

Saeed Ahmad, Anvarhusein A. Isab^*, Abdul Rahman Al-Arfaj, Alan P. Arnold

^*Corresponding author for this work

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

39 Scopus citations

Abstract

A number of new cyano(selenone)gold(I) complexes have been prepared and characterized by elemental analysis, IR and NMR methods for a series of selenones (imidazolidine-2-selenone and its derivatives or diazinane-2-selenone). It appears from the IR data two of the seven prepared complexes exist as nonionic complexes, [>C=Se-Au-CN] while the remaining five exist as the ionic species, [Au(>C=Se)₂]⁺[Au(CN)₂]^- in the solid state. In solution, all complexes are observed to undergo ligand scrambling reactions exhibiting the equilibrium, 2 [>C=Se-Au-CN]⇆[>C=Se)₂Au]⁺+[Au (CN)₂]^-. Ligand scrambling reactions of the complexes have been studied in DMSO using ¹³C and ¹⁵N NMR spectroscopy. As a result of the scrambling reaction two sharp resonances are observed in all complexes for both the carbon and nitrogen of CN^- in ¹³C and ¹⁵N NMR, respectively, corresponding to the two equilibrium components, [>C=Se-Au-CN] and [Au(CN)₂]^-. Equilibrium constants (K_eq) were determined for the scrambling equilibria by integrating the CN^- resonances in the ¹³C NMR, recorded at 297 K. K_eq values obtained for cyano(selenone)gold(I) complexes are the highest of all the reported values, measured for other complexes.

Original language	English
Pages (from-to)	2099-2105
Number of pages	7
Journal	Polyhedron
Volume	21
Issue number	21
DOIs	https://doi.org/10.1016/S0277-5387(02)01152-X
State	Published - 15 Sep 2002

Bibliographical note

Funding Information:
This research work was supported by the KFUPM Research Committee under project no. CY/NMR-STUDIES/214.

Keywords

C and N NMR spectroscopy
Cyano(selenone)gold(I) complexes
Synthesis

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/S0277-5387(02)01152-X

Cite this

@article{17355feab80543b9a9cb15ba5c4c399e,

title = "Synthesis of cyano(selenone)gold(I) complexes and investigation of their scrambling reactions using 13C and 15N NMR spectroscopy",

abstract = "A number of new cyano(selenone)gold(I) complexes have been prepared and characterized by elemental analysis, IR and NMR methods for a series of selenones (imidazolidine-2-selenone and its derivatives or diazinane-2-selenone). It appears from the IR data two of the seven prepared complexes exist as nonionic complexes, [>C=Se-Au-CN] while the remaining five exist as the ionic species, [Au(>C=Se)2]+[Au(CN)2]- in the solid state. In solution, all complexes are observed to undergo ligand scrambling reactions exhibiting the equilibrium, 2 [>C=Se-Au-CN]⇆[>C=Se)2Au]++[Au (CN)2]-. Ligand scrambling reactions of the complexes have been studied in DMSO using 13C and 15N NMR spectroscopy. As a result of the scrambling reaction two sharp resonances are observed in all complexes for both the carbon and nitrogen of CN- in 13C and 15N NMR, respectively, corresponding to the two equilibrium components, [>C=Se-Au-CN] and [Au(CN)2]-. Equilibrium constants (Keq) were determined for the scrambling equilibria by integrating the CN- resonances in the 13C NMR, recorded at 297 K. Keq values obtained for cyano(selenone)gold(I) complexes are the highest of all the reported values, measured for other complexes.",

keywords = "C and N NMR spectroscopy, Cyano(selenone)gold(I) complexes, Synthesis",

author = "Saeed Ahmad and Isab, \{Anvarhusein A.\} and Al-Arfaj, \{Abdul Rahman\} and Arnold, \{Alan P.\}",

note = "Funding Information: This research work was supported by the KFUPM Research Committee under project no. CY/NMR-STUDIES/214. ",

year = "2002",

month = sep,

day = "15",

doi = "10.1016/S0277-5387(02)01152-X",

language = "English",

volume = "21",

pages = "2099--2105",

journal = "Polyhedron",

issn = "0277-5387",

number = "21",

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TY - JOUR

T1 - Synthesis of cyano(selenone)gold(I) complexes and investigation of their scrambling reactions using 13C and 15N NMR spectroscopy

AU - Ahmad, Saeed

AU - Isab, Anvarhusein A.

AU - Al-Arfaj, Abdul Rahman

AU - Arnold, Alan P.

N1 - Funding Information: This research work was supported by the KFUPM Research Committee under project no. CY/NMR-STUDIES/214.

PY - 2002/9/15

Y1 - 2002/9/15

N2 - A number of new cyano(selenone)gold(I) complexes have been prepared and characterized by elemental analysis, IR and NMR methods for a series of selenones (imidazolidine-2-selenone and its derivatives or diazinane-2-selenone). It appears from the IR data two of the seven prepared complexes exist as nonionic complexes, [>C=Se-Au-CN] while the remaining five exist as the ionic species, [Au(>C=Se)2]+[Au(CN)2]- in the solid state. In solution, all complexes are observed to undergo ligand scrambling reactions exhibiting the equilibrium, 2 [>C=Se-Au-CN]⇆[>C=Se)2Au]++[Au (CN)2]-. Ligand scrambling reactions of the complexes have been studied in DMSO using 13C and 15N NMR spectroscopy. As a result of the scrambling reaction two sharp resonances are observed in all complexes for both the carbon and nitrogen of CN- in 13C and 15N NMR, respectively, corresponding to the two equilibrium components, [>C=Se-Au-CN] and [Au(CN)2]-. Equilibrium constants (Keq) were determined for the scrambling equilibria by integrating the CN- resonances in the 13C NMR, recorded at 297 K. Keq values obtained for cyano(selenone)gold(I) complexes are the highest of all the reported values, measured for other complexes.

AB - A number of new cyano(selenone)gold(I) complexes have been prepared and characterized by elemental analysis, IR and NMR methods for a series of selenones (imidazolidine-2-selenone and its derivatives or diazinane-2-selenone). It appears from the IR data two of the seven prepared complexes exist as nonionic complexes, [>C=Se-Au-CN] while the remaining five exist as the ionic species, [Au(>C=Se)2]+[Au(CN)2]- in the solid state. In solution, all complexes are observed to undergo ligand scrambling reactions exhibiting the equilibrium, 2 [>C=Se-Au-CN]⇆[>C=Se)2Au]++[Au (CN)2]-. Ligand scrambling reactions of the complexes have been studied in DMSO using 13C and 15N NMR spectroscopy. As a result of the scrambling reaction two sharp resonances are observed in all complexes for both the carbon and nitrogen of CN- in 13C and 15N NMR, respectively, corresponding to the two equilibrium components, [>C=Se-Au-CN] and [Au(CN)2]-. Equilibrium constants (Keq) were determined for the scrambling equilibria by integrating the CN- resonances in the 13C NMR, recorded at 297 K. Keq values obtained for cyano(selenone)gold(I) complexes are the highest of all the reported values, measured for other complexes.

KW - C and N NMR spectroscopy

KW - Cyano(selenone)gold(I) complexes

KW - Synthesis

UR - https://www.scopus.com/pages/publications/0037106236

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DO - 10.1016/S0277-5387(02)01152-X

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