Intermolecular interactions in the crystal structures of chlorogold(I) complexes with N-phosphinoamide ligands
Abstract
[AuCl{RC(O)NHPPh2-κP}]gold(I) complexes with varying amide substituents (R = Me, Ph and ferrocenyl) were prepared, characterized by elemental analysis and spectroscopic methods (mass spectrometry and multinuclear NMR and IR spectroscopy) and further studied by single-crystal X-ray crystallography with a particular focus on solid-state interactions. In all cases, the crystal assembly was based mainly on conventional hydrogen bonds between the amide moieties.
However, while in chloroform-solvated [AuCl{MeC(O)NHPPh2-κP}], these interactions were supported by pi...pi stacking of aromatic rings, in the crystal structures of the complexes bearing phenyl and ferrocenyl substituents, they cooperated with aurophilic interactions of the Au(I) centers, which in turn affected the C = O ... HN hydrogen bonds.