89299-18-3Relevant academic research and scientific papers
Coordination chemistry of the solvated AgI and AuI ions in liquid and aqueous ammonia, trialkyl and triphenyl phosphite, and tri-n-butylphosphine solutions
Nilsson, Kersti B.,Persson, Ingmar,Kessler, Vadim G.
, p. 6912 - 6921 (2006)
The coordination chemistry of solvated AgI and AuI ions has been studied in some of the most strong electron-pair donor solvents, liquid and aqueous ammonia, and the P donor solvents triethyl, tri-n-butyl, and triphenyl phosphite and tri-n-butylphosphine. The solvated AgI ions have been characterized in solution by means of extended X-ray absorption fine structure (EXAFS), Raman, and 107Ag NMR spectroscopy and the solid solvates by means of thermogravimetry and EXAFS and Raman spectroscopy. The AgI ion is two- and three-coordinated in aqueous and liquid ammonia solutions with mean Ag-N bond distances of 2.15(1) and 2.26(1) A, respectively. The crystal structure of [Ag(NH3)3]ClO 4·0.47 NH3 (1) reveals a regular trigonal-coplanar coordination around the AgI ion with Ag-N bond distances of 2.263(6) A and a Ag...Ag distance of 3.278(2) A separating the complexes. The decomposition products of 1 have been analyzed, and one of them, [Ag(NH3)2]ClO4, has been structurally characterized by means of EXAFS, showing [Ag(NH3)2] units connected into chains by double O bridges from perchlorate ions; the Ag...Ag distance is 3.01(1) A. The linear bisamminegold(I) complex, [Au(NH3)2]+, is predominant in-both liquid and aqueous ammonia solutions, as well as in solid [Au(NH3) 2]BF4, with Au-N bond distances of 2.022(5), 2.025-(5), and 2.026(7) A, respectively. The solvated AgI ions are three-coordinated, most probably in triangular fashion, in the P donor solvents with mean Ag-P bond distances of 2.48-2.53 A. The AuI ions are three-coordinated in triethyl phosphite and tri-n-butylphosphine solutions with mean Au-P bond distances of 2.37(1) and 2.40(1) A, respectively.
