209404-13-7Relevant articles and documents
Variable coordination modes of NO2- in a series of Ag(I) complexes containing triorganophosphines, -arsines, and -stibines. Syntheses, spectroscopic characterization (IR, 1H and 31P NMR, electrospray ionization mass), and structures of [AgNO2(R3E)x] adducts (E = P, As, Sb, x = 1-3)
Cingolani, Augusto,Effendy,Pellei, Maura,Pettinari, Claudio,Santini, Carlo,Skelton, Brian W.,White, Allan H.
, p. 6633 - 6645 (2002)
Adducts of triorganophosphine, triphenylarsine, and triphenylstibine with silver(I) nitrite have been synthesized and characterized both in solution 1H, 31P NMR) and in the solid state (IR, single-crystal X-ray structure analysis). In addition aggregates of AgNO2 and ER3 (E = P, As, Sb) have been identified in solution by electrospray ionization mass spectrometry (ESI-MS). The topology of the structures in the solid state was found to depend on the nature of ER3 and on the stoichiometric ratio AgNO2:ER3. The adducts AgNO2:EPh3 (1:1) (E = P or Sb) are one-dimensional polymers, the role of NO2- being to bridge successive metal atoms by coordination of the two oxygens to one silver atom and the nitrogen lone pair to a successive Ag. The adduct AgNO2:P(o-tolyl)3 (1:1) is mononuclear, due to steric hindrance of the phosphine, the nitrite being O,O′-bidentate, a rare example of a quasi-linear P-Ag-X array. AgNO2:P(p-F-C6H4)3 (1:1) is a dimer, the nitrite being coordinated through both oxygens, the first unidentate, the second bridging bidentate. P(o-tolyl)3 and Pcy3 form 1:2 adducts, also mononuclear, the nitrite still an O,O′chelate. In contrast, the adduct AgNO2:AsPh3 (1:2) is a centrosymmetric dimer, essentially an aggregate of a pair of [Ag(O2N)(AsPh3)2] arrays with one nitrite oxygen being the bridging atom. The adducts AgNO2:EPh3 (1:3) (E = As, Sb) are mononuclear, the nitrite behaving as a consistently strong O,O′-chelate. The E = As adduct is a triclinic solvated form, whereas the unsolvated E = Sb species is monoclinic. ESI-MS spectra of acetonitrile solutions of these complexes show the existence of [Ag(ER3)]+, [Ag(CH3CN)]+, [Ag(CH3CN)2]+, [AgCl2]-, [Ag(NO2)2]-, [Ag(ER3)(CH3CN)]+, and [Ag(ER3)2]+ as well as higher aggregates [Ag2(NO2)(ER3)2]+, [Ag2(NO2)3]- and [Ag2Cl2(NO2)]- which are less prevalent.
