Isolable Ethylene Complexes of Copper(I), Silver(I), and Gold(I) Supported by Fluorinated Scorpionates [HB{3‐(CF3),5‐(CH3)Pz}3]– and [HB{3‐(CF3),5‐(Ph)Pz}3]–

Abstract

The group 11 metal adducts [HB{3-(CF 3 ),5-(CH 3 )Pz} 3 ]M(C 2 H 4 ) (M = Au, Ag, and Cu; Pz = pyrazolyl) have been synthesized via a metathesis process using [HB{3-(CF 3 ),5-(CH 3 )Pz} 3 ]Na and CF 3 SO 3 Cu, CF 3 SO 3 Ag, AuCl and ethylene. The related [HB{3-(CF 3 ),5-(Ph)Pz} 3 ]Ag(C 2 H 4 ) has also been synthesized using [HB{3-(CF 3 ),5-(Ph)Pz} 3 ]Na(THF), CF 3 SO 3 Ag and ethylene. These group 11 metal ethylene complexes are white solids and form colorless crystals. They have been characterized by NMR spectroscopy and X-ray crystallography. The gold-ethylene adduct [HB{3-(CF 3 ),5-(CH 3 )Pz} 3 ]Au(C 2 H 4 ) shows large upfield NMR shifts of the ethylene proton and carbon signals relative to the corresponding peaks of the free ethylene, indicating rela- [a]

Binding Interactions in Copper, Silver and Gold π‐Complexes

“…Apart from the MOF complex MnMOF ‐ 1 ⋅ [Cu(C 2 H 4 )]BF 4 , [19] there are no structurally characterized bis(pyrazolyl)methane adducts of Cu, Ag or Au with ethylene to our knowledge. The M−N, M−C, and C=C bond lengths of [L 1 M(C 2 H 4 )] + are however, consistent with the structural data on molecules supported by various other supporting ligands, which suggests that gold interacts strongest with ethylene, followed by copper while silver having the weakest interaction with ethylene [27–28,37] …”

Versatility and adaptative behaviour of the P^N chelating ligand MeDalphos within gold(i) π complexes

“… 7 In addition, N -based chelating ligands have been occasionally found to form stable tricoordinate gold( i ) π-complexes. 8 Nonetheless, the number and variety of known π-alkene gold complexes are still limited. Tricoordinate species remain very scarce 9 and to the best of our knowledge, gold π-complexes featuring electron-poor alkenes are hitherto known.…”

Gold(I) and Silver(I) π-Complexes with Unsaturated Hydrocarbons

“…For a long time, the triphenylphosphine–gold π-complexes were considered unstable in solution. , However, we have recently shown that these complexes are much more stable than what was previously published and we were also able to characterize them by X-ray for the first time . Other silver­(I) and gold­(I) π-complexes utilizing phosphines and other ligands were characterized previously as well. − …”