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The Neutral Complex (NH 3 )Ag(NCO)
Author(s) -
Schmidt Carsten Ludwig,
Jansen Martin
Publication year - 2020
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.202000210
Subject(s) - isocyanate , chemistry , ammonia , aqueous solution , dissolution , solvation , ionic bonding , inorganic chemistry , crystal structure , crystallography , ion , medicinal chemistry , stereochemistry , organic chemistry , polyurethane
Dissolution of solid AgNCO (silver isocyanate) in aqueous ammonia (25 %) and subsequent crystal growth at T = –9 °C furnished the new ammoniate (NH 3 )Ag(NCO) as colorless crystals [ P 2 1 / c (no. 14); a = 4.1817(3) Å, b = 14.445(1) Å, c = 6.1988(5) Å, β = 102.0(4)°, V = 365,6(2) Å 3 ; Z = 4]. In the molecular monammine complex, which is only stable at temperatures below T = 0 °C, silver is in a twofold, however, asymmetrical coordination by the isocyanate anion and ammonia. At the reaction conditions applied, AgNCO does not form an ionic diammine species (e.g. [Ag(NH 3 ) 2 ] + ) as known from related silver salts. In this sense, the solvation chemistry of AgNCO exhibits a rarely observed feature.