The Molecular and Crystal Structure of Diimidazole Silver(I) Nitrate, Ag(C3H4N2)2NO3.

Antti, Carl-Johan; Lundberg, Bruno K. S.; Jamison, Warren E.; Andresen, Arne F.; Engebretsen, Jan E.; Ehrenberg, L.

doi:10.3891/acta.chem.scand.25-1758

Cited by 41 publications

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“…The [Ag(ImH),]N03 complex containing the formally neutral ligand was obtained from a mixture of AgNO, and excess imidazole, by addition of HNO, to reduce the pH to 5.5 (20) …”

Section: Resultsmentioning

confidence: 99%

Preparation and structure of silver complexes with 4-nitroimidazole

Ségalas¹,

Beauchamp²

1992

Can. J. Chem.

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ISABELLE SEGALAS and ANDRE L. BEAUCHAMP. Can. J. Chem. 70, 943 (1992). The reaction of 4-nitroimidazole (NOJmH) with AgN0, and AgBF, in neutral or weakly acidic aqueous media yielded the insoluble [Ag(N021m)] compound, whose infrared and "C NMR spectra are consistent with a polymeric chain of deprotonated ligands bridging silver atoms via the endocyclic nitrogen atoms. In strongly acidic solution, [Ag(N021mH),]X salts (X = NO,, BF,) were obtained and their crystal structures were determined. [Ag(N021mH)2]N0,: monoclinic, P2/n, a = 14.214(1), b = 12.571(2), c = 14.222(1) A, P = 111.38(7)", Z = 8, R = 0.021, 3443 observed reflections; [Ag(N021mH)2]BF,: monoclinic, P 2 , / c , n = 9.543(4), b = 6.478(2), c = 20.869(9) A, P = 90.84(3)", Z = 4, R = 0.027, 1646 observed reflections. In both compounds, the two-coordinated metal forms roughly collinear bonds to two neutral ligands via the endocyclic nitrogen atom adjacent to the nitro group. One oxygen of each nitro group makes a secondary Ag-0 bond near the equatorial plane. 'The anions are hydrogen bonded to the ligand N-H groups and do not directly interact with the metal. Solution 'H and "C NMR spectra show that the cationic complexes dissociate in DMSO. The infrared and CP-MAS "C NMR spectra are discussed in connection with the coordination patterns observed.Key words: silver, imidazole, crystal structure, infrared spectroscopy, nuclear magnetic resonance.

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“…The [Ag(ImH),]N03 complex containing the formally neutral ligand was obtained from a mixture of AgNO, and excess imidazole, by addition of HNO, to reduce the pH to 5.5 (20) …”

Section: Resultsmentioning

confidence: 99%

Preparation and structure of silver complexes with 4-nitroimidazole

Ségalas¹,

Beauchamp²

1992

Can. J. Chem.

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“…A more detailed knowledge o f the stoichiometry and structure of the complexes grew out of X-ray diffraction studies, first initiated in 1971 [4], Sever al structures have since been determined [5][6][7][8][9]. Though in most cases the expected linear twocoordinate geometry at the silver atom could be confirmed, there are also examples for species with higher coordination numbers and less regular ge ometries, mainly due to contacts with the counter ions present in the system.…”

Section: Introductionmentioning

confidence: 99%

Silver Nitrate Complexes of Nitrogen-Containing Heterocycles

Schmidbaur

Mair

Müller

et al. 1991

Zeitschrift Für Naturforschung B

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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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“…Ein allerdings als fünfzähniger Ligand wirkendes H eptaboration wurde 1988 in der Verbindung K3[Pt{B7O n (O H )5}(OH)] • 3 H20 gefunden [9] [16] mit 212 pm; auch der N -A g -NWinkel mit hier 171° gleicht dem entsprechenden Winkel von 173° [15] bzw. 172° [16].…”

Section: Introductionunclassified

“…172° [16]. Es kann daher für das hier gefundene Kation die Koordinations zahl 2 für Ag angenommen werden.…”

Section: Introductionunclassified