Gold(I) Formamidinate Clusters: The Structure, Luminescence, and Electrochemistry of the Tetranuclear, Base-Free [Au₄(ArNC(H)NAr)₄]

CO oxidation over Au/TiO2 prepared from metal-organic gold complexes

“…The synthesis and structures of these complexes are reported elsewhere [18,19]. The amount of the particular gold complex was dissolved in CH 2 Cl 2 and mixed with TiO 2 (Degussa P-25) to obtain a nominal gold loading of 1 wt% with respect to the TiO 2 support.…”

Reactivity of Mononuclear and Dinuclear Gold(I) Amidinate Complexes with CS2 and CsBr3

“…Di- [4][5][6], tri- [4], and tetranuclear [7][8][9][10] gold amidinate complexes have been isolated, but to our knowledge, only one mononuclear gold complex has been reported [11]. However, that compound contains a protonated amidine ligand.…”

Synthesis of volatile, reactive coinage metal 5,5-bicyclic amidinates with enhanced thermal stability for chemical vapor deposition

“…Single-crystal X-ray diffraction confirmed that the gold(I) complex 3 possesses the same solid-state dimeric structure as the copper(I) complex 2 (Figure 1a and Tables S1,2 ,4,6). Gold(I) amidinates and guanidinates typically adopt dimeric 24,30,34 or tetrameric structures, [35][36][37][38] depending on the steric demand of the ligand. One of these tetramers is a gold(I) complex of 1,4,6triazabicyclo[3.3.0]oct-4-ene, 35 the non-methylated guanidine analogue of 1, suggesting that in 3 the four methyl groups per ligand may contribute to the preference for a dimeric structure.…”

“…The gold atoms and the amidinate N-C-N cores form a single plane, with symmetric Au-N distances of 2.013(3) Å that fall on the short end of typical gold(I) amidinates. 24,30,[34][35][36][37][38][39] The Au···Au distance of 2.855(1) Å is long for a digold(I) amidinate, in which this distance is typically 2.644(2)-2.711(3) Å. 24,30,34,39 The ringconstrained N-C-N angle is also larger than usual, at 131.9(2)° (cf.…”

“…121.8(5)-128.6(5)° in gold(I) amidinates). 24,30,[34][35][36][37][38][39] Interestingly, molecules of 3 pack face-to-edge (Figures 1b, S7 and Table S6), with three neighboring methyl groups pointing at each planar face of the molecule. A recent review of Au···H-C interactions describes as hydrogen bonding Au I ···H-C distances Au I ···H < 3 Å and Au I ···C < 4 Å, preferably with the Au I ···H -C angle approaching 180°.…”