Silver Complexes, Nitrogen Heterocycles, Pyrazole. Triazole, 8 -Am ino-quinoline Pyrazole, 1,2,4-triazole, and 8 -am ino-quinoline form complexes as neutral ligands with sil ver nitrate in slightly acidic aqueous medium. With pyrazole a 2:1 complex (1) is obtained. The crystal structure determination revealed an ionic structure with independent N 0 3~ anions and centrosymmetrical (pyr)2A g + cations with a linear coordination geometry at the silver atoms. The reactions with 1,2,4-triazole and 8 -am ino-quinoline yield dimeric 1 :1 complexes (2, 3), in which the silver atom s are bridged by the ligands and have short contacts with nitrate oxygen atom s. The coordination geometry o f the metals can thus be described as distorted tetrahedral. A 1 :1 complex with 2,3-diphenyl-1,2,4-triazole (2a) and a 2:1 complex with 8 -hydroxy-quinoline (4) have also been prepared, but not characterized in detail.
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