Molecular structure of hydrated complex of 1,4-dimethylpiperazine di-betaine with l-tartaric acid

Reversible Phase Transition of 1,4-Diazoniabicyclo[2.2.2]octane-1-acetate-4-acetic Acid Chloride Trihydrate

“…Therefore, it is really a useful way to further explore the contribution of hydrogen-bonding interaction to structural phase transition by replacing hydrogen atoms with deuterium atoms. The double betaine ligand, containing pairs of anionic carboxylate groups and quaternary ammonium groups in the same molecule, is a good material to construct hydrogen-bonded structures with other inorganic or organic acids. , As a continuation of our study , of phase transitions involving hydrogen-bond systems, herein, we study the phase transition properties and deuteration effect of the 1:1:3 complexes of DABCO dibetaine (1,4-diazoniabicyclo[2.2.2]octane-1-acetate-4-acetic acid) with chloride ion and water molecule by differential scanning calorimetry (DSC), single-crystal X-ray analysis, and dielectric measurements.…”

Supramolecular structure of the 1:2 complex of 1,4-dimethylpiperazine mono-betaine with squaric acid

“…The reaction pathway depends on the reaction conditions (2)(3)(4)(5)(6)(7). Recently, we have studied hydrogen-bonded complexes of 1-carboxymethyl-1,4-dimethylpiperazinium inner salt (1,4-dimethylpiperazine mono-betaine, MBPZ) and 1,4-dicarboxymethyl-1,4-dimethylpiperazinium inner salt (1,4-dimethylpiperazine di-betaine) with HCl (7), p-hydroxybenzoic acid (8,9), 3-iodobenzoic acid (10) and L-and meso-tartaric acids (11)(12)(13). In betaines ($N þ ZCH 2 ZCOO 2 ), the nitrogen atom can be surrounded by alkyls or participates in saturated five-or six-membered ring or aromatic heterocyclic ring (14).…”

Molecular structure of hydrated complex of trigonelline with l(+)-tartaric acid

“…Other complexes show unusual, very interesting structures; e.g. the 1:2 complex of diaminocyclohexane with TA [11], the 1:1 complex of 4-dimethylaminopyridine with TA and two water molecules [8], the complexes of lysine, arginine and histidine with TA [9,[12][13][14], the hydrated complex of 1,4-dimethylpiperazine dibetaine with TA [15], the hydrated complex of piperidine-4-carboxylic acid with TA [16] and the 2:1 and 3:1 complexes of pyridine betaine with TA [17]. The arrangement of complexes of organic bases with TA in the crystal lattice depends on the stoichiometry, structure of bases and number of water molecules.…”