Bis(1,3,5-triaza-7-phosphaadamantane-P)gold(I) Chloride

Utilization of a Nonemissive Triphosphine Ligand to Construct a Luminescent Gold(I)-Box That Undergoes Mechanochromic Collapse into a Helical Complex

“…41,42 Thus, it has been suggested that 2-coordinate gold(I) complexes can form an exciplex with a somewhat distant halide ligand (Au ••• Cl distance 3.224 Å) upon photoexcitation. 43 A similar situation seems to be relevant here. , 3B, at room temperature.…”

Co-ordination and conformational isomerism in bis(tricyclohexylphosphine) gold(I) halides

“…Thus, for X = Cl, the complexes with tritert-butylphosphine (P t Bu 3 ) and tricyclohexylphosphine (PCy 3 ) crystallise as linear two-co-ordinate ionic salts, [Au(PR 3 ) 2 ] ϩ Cl Ϫ with isolated cations and anions, 1,2 while those with trimethylphosphine (PMe 3 ) and 1,3,5-triaza-7-phosphaadamantane (TPA) crystallise as "ion-pair" salts, [Au(PR 3 ) 2 ϩ ؒ ؒ ؒ Cl Ϫ ], which exhibit relatively short Au ؒ ؒ ؒ Cl distances (<3.2 Å) but in which the P-Au-P angle remains close to 180Њ. 3,4 By contrast, the complexes of triphenylphosphine (PPh 3 ) for X = Cl, Br and I all form neutral three-co-ordinate molecules, [Au(PPh 3 ) 2 X], with strongly co-ordinated halide and the P-Au-P angles diminished to 132-136Њ. 5, 6 Mössbauer studies on the triethylphosphine complexes Au(PEt 3 ) 2 X (X = Cl or I) and solid state 31 P CP MAS NMR as well as low frequency vibrational and Mössbauer spectroscopic studies on Au(PMe 3 ) 2 I provide further evidence that gold-halide bonding interactions are involved in the formation of these complexes.…”

Vapoluminescent Behavior and the Single‐Crystal‐to‐Single‐Crystal Transformations of Chloroform Solvates of [Au2(μ‐1,2‐bis(diphenylarsino)ethane)2](AsF6)2

“…The difference in luminescence in the two solvates can be attributed to the differences in Au⋅⋅⋅Au distances and the alterations in the environments surrounding Au1, as seen in Figure . In regard to the chloroform and hexafluoroarsenate ions surrounding Au1, it is important to note that a non‐coordinated chloride ion, which is 3.224 Å from the gold(I) center in [Au‐(1,3,5‐triaza‐7‐phosphaadamantane) 2 ]Cl, has been implicated in understanding the emissive properties of this complex . Additionally, the luminescence of a binuclear copper(I)/gold(I) complex has been shown to be sensitive to subtle anion/cation interactions …”