In the title compound, C(12)H(15)NO(3)·H(2)O, the conformation of the N-H bond in the amide segment is syn to the ortho-methyl group and anti to the meta-methyl group in the benzene ring. Further, the conformations of the amide O and the carbonyl O atom of the acid segment are anti to the adjacent methyl-ene H atoms. The C=O and O-H bonds of the acid group are syn to one another. The structure ...

The title mol-ecular salt, C5H7N2 (+)·C12H8ClN4O7 (-)·0.5H2O, crystallizes as a hemihydrate. The two rings in the barbiturate anion are not coplanar but make a dihedral angle of 43.17 (16)°. The two nitro groups deviate from the ring to which they are attached; the nitro group ortho with respect to the ring junction is more deviated [39.3 (4)°] than that in the para position [4.2 (5)°], probabl...

The title compound, C(13)H(10)N(+)·C(7)H(4)NO(4) (-), consists of a protonated acridinium cation and a 6-carb-oxy-pyridine-2-carboxyl-ate monoanion. The carboxyl-ate group of the anion appears to be delocalized on the basis of the nearly equivalent C-O bond lengths. In the crystal, the anions are connected by strong O-H⋯O hydrogen bonds, forming chains along the b axis. The acridinium cations a...

There are three formula units in the asymmetric unit of the title compound, C(14)H(16)N(2)O(4)·H(2)O. Mol-ecules are linked by N-H⋯O hydrogen bonds into dimers with the common R(2) (2)(8) graph-set motif. Between dimers, single N-H⋯O hydrogen bonds are formed between the other N-H group of each pyrimidine ring and the hydroxyl groups. The water mol-ecules accept O-H⋯O hydrogen bonds from the hy...

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In this paper, NMR and QTAIM analysis for three substituted of T2SA complex was investigated in the gas and four solvents at DFT level. Intermolecular O–H…N hydrogen bonds between 1,2,4,5-Tetrazine and Sulphurous acids enhance the stability of complex.1,2,4,5-Tetrazine is a highly reactive diene for [4+2] inverse-Diels–Alder cycloaddition processes and an excellent precursor to attain the pyrid...