124914-59-6Relevant articles and documents
Dimeric Triazenido and Pentaazadienido Complexes of Monovalent Silver. Synthesis and Structure of 2 . 2/3 Pyridine, 2 and 2 . Pyridine
Hartmann, Edmund,Schmid, Raimund,Straehle, Joachim
, p. 778 - 785 (2007/10/02)
2 (1) is formed in THF from AgNO3 and the triazenide anion, as obtained from the corresponding triazene and Na. 1 crystallizes from pyridine in the form of orange-yellow, air stable crystals with the composition 1 . 2/3 C5H5N: space group P1 with a = 1468.0(5), b = 1514.1(6), c = 1316.1(3) pm, α = 113.45(3) deg, β = 114.81(2) deg, γ = 66,78(3) deg, Z = 3.The triazenide ion functions as a bridging ligand forming planar (AgN3)2 heterocycles.The unit cell contains two symmetry-independent dinuclear complexes, one of which is centrosymmetrical.The short Ag-Ag distances of 268.0 and 269.8 pm suggest Ag-Ag bonding.The pentaazadienido complexes Ag(RN5R) with R = p-MeO-C6H4 (2), p-EtO-C6H4 (3), p-Cl-C6H4 (4), p-F-C6H4 (5), are obtained from saturated solutions of the pentaazadiene in conc.NH3 and AgNO3 as explosive, red precipitates which are stable in air.Crystals of 2 and 3 .C5H5N are obtained from pyridine. 2 crystallizes in the monoclinic space group P21/c: a = 583.7(6), b = 1705.1(9), c = 1489.6(9) pm, β = 96.2(1) deg, Z =2; 3 .C5H5N is triclinic (space group P1) with a = 1160.4(4), b = 1671.0(6), c= 509.0(1) pm, α = 97.51(2) deg, β = 97.36(2) deg, γ = 81.51(3) deg, Z = 1.The complexes 2 and 3 are dinuclear with the pentaazadienide ion as a(N1)-η1, (N5)-η1 bridging ligand in 2 and a (N1)-η1, (N3)-η1 bridging ligand in 3.The bridging mode in 3 results in a short Ag-Ag contact of 283.44 pm.The Ag-N distances range from 210.8 to 215.7 pm in 1 and from 215.0 to 220 pm in (2) and (3). - keywords: 1,3-Bis(p-methoxyphenyl)triazenido-siver(I), 1,5-Bis(p-methoxyphenyl)pentaazadienido-silver(I), 1,5-Bis(p-ethoxyphenyl)pentaazadienido-silver(I), Synthesis, Crystal Structure
