The Crystal Structure, Vibrational Spectra, and Thermal Behavior of Piperazinium(2+) Selenate Monohydrate and N, N′-Dimethylpiperazinium(2+) Selenate Dihydrate

1,4-diazabicyclo[2.2.2]octane-1,4-diium dihydrogen phosphate monohydrate from X-ray and neutron data

“…The title compound 1,4-diazabicyclo[2.2.2]octane-1,4-diium dihydrogen phosphate monohydrate (I) belongs to the group of substances based on the salts of oxo-acids and nitrogen-containing organic bases, which could have interesting physical properties originating from the presence of various hydrogen bonds, whose arrangement and energies are crucial for this type of proton conductors. Till this time synthesis, properties and crystal structures of several new salts, where the anions were selenite, hydrogen selenite, diselenite, selenate, hydrogen selenate, phosphate, hydrogen phosphate and dihydrogen phosphate and the cations piperazinium and N,N 0 -dimethylpiperazinium (Havlíček et al, 2000;Němec et al, 2001;Havlíček et al, 2002;Plocek et al, 2003), ethanediammonium, 1,3-propanediammonium and 1,4-butanediammonium have been studied, but it was just the compound (I), which showed the structure with some unique features and has also provided nonlinear dependence of the current on the voltage in DC measurement. This apparent discrepancy with the Ohm's law is connected with charge transfer resistance of the proton conducting sample, where a rectified transport of protons released from the own structure is followed by their transport near the surface and heterogeneous electron transfer.…”

Formation of One-Dimensional Water Inside an Organic Solid: Supramolecular Architectures Derived by the Interaction of Aminobenzoic Acids with Nitrogen Bases and H2SO4

“…Complexes of 2-ABA-H and 3-ABA-H with various organic amines have been reported in the literature. − Compounds possessing organic cations and inorganic or organic anions are of interest not only because they provide interesting supramolecular networks, but they can also exhibit novel structural features such as chirality . Supramolecular assemblies of organic amines and tetrahedral oxo-anions have not been studied adequately, although examples of amine salts of H 3 PO 4 , and H 2 SeO 4 are known. Recently, Rao and co-workers have investigated sulfates of organic diamines to examine the variability and richness of these compounds in supramolecular structures.…”

New Uranyl Open Framework and Sheet Compounds Formed via In-Situ Protonation of Piperazine by Phosphorous Acid

“…In the reaction, the stronger phosphorous acid was able to transfer its acidic protons to piperazine to protonate both nitrogen atoms and create the piperazinium dication. This dication has been observed in different organic and inorganic structures [47][48][49][50][51][52] and has been previously used as an organic templating agent [53]. In the structure of (1), the nitrogen protons (H1A and H1B) on the piperazinium both showed strong hydrogen bonding to O(2) on the phosphite anion at ~1.89 Å each.…”