In the cation of the title compound, C(7)H(9)BrN(+)·HSO(4) (-), the amino N atom is protonated. In the crystal, inter-molecular O-H⋯O and N-H⋯O hydrogen bonds generate an infinite two-dimensional network parallel to (001).

A novel cyclophane consisting of methylene-bridged imidazolium- and pyrazole-moieties (calix[4]imidazolium[2]pyrazole) and two of its applications are presented. First, supramolecular recognition of an acetonitrile molecule by hydrogen bonding in the solid state is examined. Second, the capability to act as a ligand precursor is shown by the synthesis and characterisation of the respective dinu...

background protein-bound toxins such as indoxyl sulfate (is) are not efficiently removed by conventional hemodialysis (hd). objectives to improve the removal of is, we performed an in vitro study to evaluate the effects of high dissolved hydrogen on the dissociation of is from albumin using simulated hd. materials and methods wasted dialysate from peritoneal dialysis was concentrated a hundred ...

The title compound, C(13)H(16)N(3)O(+)·PF(6) (-), which has an imide group in the imidazolium cation, is a new ionic liquid above its melting point. Two neighbouring mol-ecules are connected by a weak non-classical C-H⋯O hydrogen bond with the formation of centrosymmetric 14-membered dimers.

Although it is beyond doubt that mammary cells accumulate iodide via a Na+-dependent transport mechanism, it is not clear if this is the only pathway for iodide transport in mammary tissue. In view of this, experiments were designed to test for the presence of an anion-exchange pathway which could mediate the transport of iodide into mammary cells; thus, the effect of external iodide on sulfate...

Dynamic tribochemical processes for dicationic ionic liquid containing a geminal imidazolium cation head group bridged by a poly(ethylene glycol) and a bis(trifluoromethylsulfonyl)imide anion were studied using time-resolved mechanically stimulated gas emission mass-spectrometry (MSGE-MS). In comparison with similar monocationic imidazolium ionic liquids with short alkyl or long polyether side ...

In the title salt, C(11)H(21)N(2) (+)·C(6)H(5)O(3)S(-), which has two cation-anion pairs in the asymmetric unit, the two imidazolium cations are linked to two separate acceptor O atoms of one of the benzene-sulfonate anions through aromatic C-H⋯O hydrogen bonds, while the second anion is unassociated.

one-pot preparation of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles has been conducted in the presence of poly(4-vinylpyridinium butane sulfonic acid) hydrogen sulfate, p(4vpbsa)hso4, as an efficient dual acidic catalyst under solvent-free conditions. reusability of the catalyst, easy work-up procedure, eco-friendly reaction conditions, short reaction times and high yields of th...