Crystal structure of hemikis(cyclohexane-1,4-diammonium) (pyridine-2-carboxylate), [C₆H₁₆N₂]_0.5[C₆H₄NO₂]

Abstract

C 6 H 16 N 2 ] 0.5 [C 6 H4NO 2 ], triclinic, P1 (no. 2), a = 6.7956(2) Å, b = 7.2840(3) Å, c = 10.2615(4) Å, α = 70.483(3)°, β = 80.902(3)°, γ = 66.404(3)°, V = 438.55(3) Å 3 , Z = 2, Rgt(F) = 0.0359, wR ref (F 2 ) = 0.0988, T = 100(2) K.

Crystal structure of the co-crystal 4-[(4-carboxyphenyl)disulfanyl]benzoic acid–(1E,4E)-1-N,4-N-bis(pyridin-4-ylmethylidene)cyclohexane-1,4-diamine (1/1), C14H10O4S2⋅C18H20N4

“…The observation of n-DTBA, or its derived di-anion, arises from the oxidation of the n-mercaptobenzene, for n = 2, 3 and 4, starting material, as has been commented upon previously [7][8][9]; the species with a single sulfur bridge has also been found [10]. Up to the present time, a characteristic of the aforementioned Schiff bases is their breakdown during co-crystallization [11][12][13][14]. Often, this results in isolation [11][12][13].…”

“…Up to the present time, a characteristic of the aforementioned Schiff bases is their breakdown during co-crystallization [11][12][13][14]. Often, this results in isolation [11][12][13]. Intriguingly, the original 2-pyridyl isomer of the Schiff base has also been converted to a 2-(4-ammoniocyclohexyl)-3-(pyridin-2yl)imidazo[1,5-a]pyridin-2-ylium di-cation [14].…”

Crystal structure of cyclohexane-1,4-diammonium 2-[(2-carboxylatophenyl)disulfanyl]benzoate — dimethylformamide — monohydrate (1/1/1), [C6H16N2][C14H8O4S2] ⋅ C3H7NO⋅H2O

“…Recent co-crystallization studies involving isomeric Schiff bases appended with pyridyl donors, i.e. N,N′-bis((pyridinen-yl)methylene)cyclohexane-1,4-diamines, for n = 2, 3 and 4, as coformers have resulted in the isolation of crystals whereby the original n = 2 species has been converted into a cyclohexane-1,4-diammonium di-cation, as in its salt with pyridine-2-carboxylate [6]. In another experiment, the n = 2 species was converted to a 2-(4-ammoniocyclohexyl)-3-(pyridin-2-yl)imidazo [1,5-a]pyridin-2-ylium dication in a salt with 2-[(2-carboxylatophenyl)disulfanyl]benzoate [7].…”