
Zeitschrift fur Anorganische und Allgemeine Chemie p. 1767 - 1772 (2005)
Update date:2022-07-29
Topics:
Neumueller, Bernhard
Weller, Frank
Schmock, Fritjof
Dehnicke, Kurt
Tetraphenylphosphonium bromide reacts in acetonitril suspension with excess silver nitrate to give (Ph4P)[Ag(NO3)2(CH 3CN)]·CH3CN (1), whereas (Ph4P)[Ag 2-(NO3)3] (2) is obtained in a long-time reaction from (Ph4P)Br and excess AgNO3 in dichloromethane suspension. Both complexes were characterized by vibrational spectroscopy (IR, Raman) and by single crystal structure determinations. 1: Space group P2 1/c, Z = 4, lattice dimensions at 193 K: a = 1781.5(3), b = 724.8(1), c = 2224.2(3) pm, β = 96.83(1)°, R1 = 0.0348. 1 contains isolated complex units [Ag(NO3)2(CH3CN)] -, in which the silver atom is coordinated by the chelating nitrate groups and by the nitrogen atom of the solvated CH3CN molecule with a short Ag-N distance of 220.7(4) pm. 2: Space group 12, Z = 4, lattice dimensions at 193 K: a = 1753.4(4), b = 701.7(1), c = 2105.5(4) pm, R 1 = 0.072. In the polymeric anions [Ag2(NO 3)3]- each silver atom is coordinated in a chelating manner by one nitrate group and by two oxygen atoms of two bridging nitrate ions. In addition, each silver atom forms a weak π-bonding contact with a phenyl group of the (Ph4P)+ ions with shortest Ag...C separations of 266 and 299 pm, respectively, indicating a (4+1) coordination of silver atoms.
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Doi:10.1139/v05-091
(2005)Doi:10.1016/0031-9422(80)85072-2
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(2005)