Isolation of bis(1,4-diphenyl-1,4-bis(2-pyridyl)-2,3-diaza-1,3-butadiene) disilver with bridging (N-N) dinucleating subunits: formation of a 6-membered chelate ring

摘要

A novel Ag(I) dinuclear complex {[(C_6H_5)(C_5H_4N)-C=N-N=C-(C_5H_4N)(C_6H_5)]Ag}_2.ClO_4(ClO_4) (1/2CH_3CN) (1) that was derivedunder mild conditions, during the course of combination of AgClO_4with a polymorphic azine ligand, 1,4-diphenyl-1,4-bis(2-pyridyl)-2,3-diaza-1,3-butadiene (L) (condensed product of phenyl 2-pyridyl ketoneand hydrazine monohydrate) is reported. The aforementioned complex isbased on a central rotationally flexible diazine subunit (N-N). Theazine ligand, L, having the N_2 dinucleating fragment, provides acoordination focus for pairs of metal centres and ultimately leads tothe formation of a 6-membered chelate ring in 1.