The title two-component mol-ecular crystal, C(10)H(8)N(2)·C(2)H(4)N(4)S, was obtained unexpectedly by reaction of Zn(NO(3))(2)·6H(2)O, NH(4)BF(4) with 3-amino-1,2,4-triazole-5-thione (3-AMT) and 4,4'-bipyridine in water. The dihedral angle between the pyridine rings in the 4,4'-bipyridine molecule is 17.00 (13)°. In the crystal, N-H⋯N and N-H⋯S hydrogen bonds between the components lead to the ...

Preparation of 4-benzyl-2-substituted phthalazin-1-one derivatives 2-8 is reported. Condensation of 4-benzyl-1-chlorophthalazine (9) with a series of different nucleophiles gave 4-benzylphthalazin-1-ylamino derivatives (10-13 and 16) and 4-amino-2-[N'-(4-benzylphthalazin-1-yl)-hydrazino]-6-arylpyrimidine-5-carbonitriles (14a,b). Interaction of 9 with ambident anions was also studied. 5-Benzyl-6...

The reactions of benzo[e][2,1]thiazine-4-chloro-3-carbaldehydes 1 and benzo[e][2,1]thiazine-4-chloro-3-carbonitriles 2 with a number of oxidizing and reducing agents are reported. A number of new, highly functionalized benzo[e][2,1]thiazine derivatives having potential biological activity were synthesized and described.

New tripodal transition metal ion receptors, tris(5-ethoxycarbonyl-2,2'-bipyridine) and tris(5-carboxylate-2,2'-bipyridine) substituted 27-membered trimeric piperazine cyclophanes 5 and 7 as well as tetra(5-ethoxycarbonyl-2,2'-bipyridine) substituted 36-membered tetrameric piperazine cyclophane 6, have been prepared and their transition metal ion complexing properties studied in solution by UV-...

Heterotetrametallic [{[Ti](μ-σ,π-C≡CSiMe3)2}Cu-bipy-C≡C-AuPh2PFc]PF6 (5) ([Ti] = (ηC5H4SiMe3)2Ti; Fc = (η-C5H4)(η-C5H5)Fe; bipy = 2,2`-bipyridine) is accessible by the consecutive reaction of FcPPh2-AuCl (1) with 5-ethynyl-2,2`-bipyridine (2) producing FcPPh2-AuC≡C-bipy (3) which further reacts with [{[Ti](μ-σ,π-C≡CSiMe3)2}Cu(N≡CMe)]PF6 (4) to give the title complex in which four different tran...

The molecule in which a methyl viologen (MV2+) moiety is coupled through a three-carbon chain to one bipyridine in Ru(bpy)3 (bpy ) 2,2′bipyrine), [Ru(bpy)2(4-(2-(1′-methyl-4-4′-bipyridinediium-1-yl)propyl)-4′-methyl2,2′-bipyridine), abbreviated Ru(bpy)2(MV-bpy)], does not emit upon photoexcitation because of rapid quenching of the MLCT state by the MV2+. The integrated steady-state photoemissio...

As atividades antiinflamatórias de oito compostos 4-amino-2,6-diarilpirimidina-5-carbonitrilas foram sujeitas a uma análise QSAR baseada nos resultados de cálculos de estrutura eletrônica B3LYP/6-31G(d,p) e AM1. Análise de Componentes Principais e regressões baseados nesses dados indicam que compostos potencialmente mais ativos teriam menores valores de momentos de dipolo e de coeficientes de p...