2,2′:6′,2′′-Terpyridine 1,1′′-dioxide dihydrate

Abstract

The title compound, C15H11N3O3·2H2O, crystallizes with ter­pyridine dioxide mol­ecules positioned on mirror planes in the space group Pnma. Catemeric assemblages of ter­pyridine mol­ecules [C—H⋯−O—+N = 3.386 (4) Å] are linked by bridging water mol­ecules [C—H⋯O = 3.288 (4) and 3.386 (4) Å; O—H⋯−O—+N = 2.837 (3) and 2.878 (4) Å], giving stacks of two‐dimensional undulating motifs.

Phase-separated hydrogen-bonded chloride ion–water–oxonium ion sheets and protonated 4′-(4-bromophenyl)-2,2′:6′,2″-terpyridine stacks, and condensation products of 2-acetylpyridine and benzaldehydes revisited

“…Colourless, X-ray quality crystals of 3 were obtained by slow evaporation of a CHCl 3 / MeOH solution of the crude product in the presence of excess of 1,3-diaminopropane. The IR and 1 H and 13 C NMR spectroscopic data agreed with those reported. 3,5 FAB-MS 698.0 [M + H] + (calc.…”

“…Commercially available chemicals were reagent grade and were used without further purification. 1 H and 13 C NMR spectra were recorded at room temperature on a Bruker Avance DRX 500 MHz spectrometer; chemical shifts are relative to residual solvent peaks with TMS d ¼ 0 ppm. Infrared spectra were recorded on a Shimadzu FTIR-8400S spectrophotometer with solid samples on a Golden Gate diamond ATR accessory.…”

“…Of these, most exhibit single water molecules or dimers, either in discrete pockets in the structure or hydrogen bonded to donor atoms in the ligand. [12][13][14][15][16][17][18] In one case, {H 2 O} 3 units interconnect ligands to produce hydrogen bonded chains. 14 Protonated tpy ligands are prone to being involved in hydrogen bonded assemblies, examples including chloride-water chains, 19 and methylsulfate-water aggregates.…”

Crystal structure of 2,2': 6', 2 " - terpyridinel 1,1" -dioxide 1,2,4,5 - tetracyanobenzene , C15H11N3O2 · C6H4(CN)4

“…We have prepared the title compound as a continuing effort to understand the intermolecular contact preferences of the N-oxide group in molecular crystals [1][2][3][4]. 2,2':6',2"-Terpyridine l,l"-dioxide was prepared using a modification of the procedure for direct oxidation of pyridine and pyrazine moieties [5].…”

Crystal structure of 2,2″:6′,2″-terpyridine 1,1″-dioxide 1,2,4,5-tetracyanobenzene, C15H11N3O2 · C6H4(CN)4

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Source of materialWe have prepared the title compound as a continuing effort to understand the intermolecular contact preferences of the N-oxide group in molecular crystals [1][2][3][4]. 2,2¢:6¢,2²-Terpyridine 1,1²-dioxide was prepared using a modification of the procedure for direct oxidation of pyridine and pyrazine moieties [5].

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