¹⁹⁷Au Mössbauer spectroscopy on some aurous and auric complexes

Abstract

Working at liquid helium temperatures we have obtained velocity spectra for 31 gold complexes. The variations in isomer shift and quadrupole splitting for the series LAuCI. LAuCI, [L = Ph,P, (C6F5) Ph,P, Ph,As, C5H5N, Me,S, and p-tolylisocyanide] ; Ph,PAuX (X = I, Br, CI, N, , OCOMe, CN, and Me) ; and M+AuX,-(X = F, Cl, Br, and I are discussed in terms of sp and dsp2 hybridization of the gold atom. All the quadrupole splitting of the aurous compounds are larger than those of any of the auric compounds.L. D. Roberts and J. 0. Thomson, Phys. Rev., 1963, 129, 664.

Structural, 197Au Mössbauer and solid state 31P CP/MAS NMR studies on bis (cis-bis(diphenylphosphino)ethylene) gold(i) complexes [Au(dppey)2]X for X = PF6, I

“…Nevertheless, there is a reasonable correlation between the structural and spectroscopic results. Thus, the structure of [(AsPh 3 ) 4 Au]BF 4 9 shows an almost tetrahedral geometry for (Table 2).…”

Stability andtransInfluence in Fluorinated Gold(I) Coordination Compounds

“…Gold(I) tris(pentafluorophenyl)phosphine complexes have been extensively used as catalysts in organic conversions . In contrast, the applications and properties of the related partially fluorinated phosphines have been relatively unexplored . This circumstance occurs despite the interesting opportunities for the analysis of the ligand‐induced influences over the catalytic center that these compounds offer.…”

“…[1][2][3][4][5][6][7][8] In contrast, the applications and properties of the related partially fluorinated phosphines have been relatively unexplored. [9][10][11] This circumstance occurs despite the interesting opportunities for the analysis of the ligand-induced influences over the catalytic center that these compounds offer.…”

35Cl-, 75As-NQR- und 197Au-Mößbauer-Untersuchungen an Gold(I)-chlorid-Komplexen / 35Cl-, 75As-NQR- and 197Au-Mössbauer Investigations of Gold(I)-chloride Complexes

“…Im Rahmen unserer eigenen Arbeiten haben wir neben diesen herkömmlichen Methoden 13 nun auch die Kernquadrupolresonanz-und die Mößbauer-Spektroskopie eingesetzt, die bisher auf diese Problemstellung noch gar nicht (NQR) oder nur wenig angewendet worden sind 14 . Über reine 197 Au-NQR-Messungen ist bisher überhaupt nur zweimal, und zwar an den Beispielen AuCl 15 Nach dieser vereinfachten Formel lassen sich die relativen kovalenten (a) und ionischen Anteile (1-o) der Au-Cl-Bindung berechnen.…”