2 research outputs found
Azido, Triazolyl, and Alkynyl Complexes of Gold(I): Syntheses, Structures, and Ligand Effects
Gold(I) triazolyl complexes are prepared
in [3 + 2] cycloaddition reactions of (tertiary phosphine)gold(I)
azides with terminal alkynes. Seven such triazolyl complexes, not
previously prepared, are described. Reducible functional groups are
accommodated. In addition, two new (<i>N</i>-heterocyclic
carbene)gold(I) azides and two new gold(I) alkynyls are described.
Eight complexes are crystallographically authenticated; aurophilic
interactions appear in one structure only. The packing diagrams of
gold(I) triazolyls all show intermolecular hydrogen bonding between
N-1 of one molecule and N-3 of a neighbor. This hydrogen bonding permeates
the crystal lattice. Density-functional theory calculations of (triphenylphosphine)gold(I)
triazolyls and the corresponding alkynyls indicate that the triazolyl
is a stronger <i>trans</i>-influencer than is the alkynyl,
but the alkynyl is more electron-releasing. These results suggest
that <i>trans-</i>influences in two-coordinate gold(I) complexes
can be more than a simple matter of ligand donicity
Azido, Triazolyl, and Alkynyl Complexes of Gold(I): Syntheses, Structures, and Ligand Effects
Gold(I) triazolyl complexes are prepared
in [3 + 2] cycloaddition reactions of (tertiary phosphine)gold(I)
azides with terminal alkynes. Seven such triazolyl complexes, not
previously prepared, are described. Reducible functional groups are
accommodated. In addition, two new (<i>N</i>-heterocyclic
carbene)gold(I) azides and two new gold(I) alkynyls are described.
Eight complexes are crystallographically authenticated; aurophilic
interactions appear in one structure only. The packing diagrams of
gold(I) triazolyls all show intermolecular hydrogen bonding between
N-1 of one molecule and N-3 of a neighbor. This hydrogen bonding permeates
the crystal lattice. Density-functional theory calculations of (triphenylphosphine)gold(I)
triazolyls and the corresponding alkynyls indicate that the triazolyl
is a stronger <i>trans</i>-influencer than is the alkynyl,
but the alkynyl is more electron-releasing. These results suggest
that <i>trans-</i>influences in two-coordinate gold(I) complexes
can be more than a simple matter of ligand donicity