In the structure of the title compound, C(8)H(12)NO(+)·C(7)H(5)O(6)S(-)·H(2)O, isolated from the reaction of 2-(4-amino-phen-yl)ethanol with 5-sulfosalicylic acid, the cations form head-to-tail hydrogen-bonded chains through C(1) (1)(9) anilinium N(+)-H⋯O(hydrox-yl) inter-actions while the anions also form parallel but C(1) (1)(8)-linked chains through carboxylic acid O-H⋯O(sulfonate) inter-act...

In the structure of the title salt, C(12)H(10)N(3)O(4) (+)·C(7)H(3)N(2)O(7) (-), the cations and the anions are linked by a single N(+)-H⋯O(carbox-yl) hydrogen bond, the discrete cation-anion unit having no inter-molecular associations other than weak cation-anion aromatic ring π-π inter-actions [ring centroid separation = 3.7320 (14) Å] and a number of weak inter-unit aromatic C-H⋯O contacts. ...

In the title hydrate, C(18)H(20)BrO(4)P·H(2)O, a staggered conformation is found when the organic mol-ecule is viewed down the central P-C bond, with the oxo and hydroxyl groups being diagonally opposite; each of the central P and C atoms has an S-configuration. The crystal structure features supra-molecular double chains along the b axis mediated by O(hydrox-yl)-H⋯O(oxo), O(water)-H⋯O(oxo), an...

The studies reported here support the observation that elevated excretion of ~-hydrox~henylp~~uvic acid could occur in the presence of deficient hepatic tyrosine aminotransferase activity. The ketoacid need not have come either from the liver or from the kidney. It appears possible that the urinary ketoacid, both in tyrosine aminotransferase deficiency and in phenylketonuria, originates not in ...

Sea cucumbers are characterized by their content in holothurins, triterpenoid glycosides that are responsible for the toxicity of these echinoderms. Nearly 100 holothurins isolated in the last twenty years are grouped into three main aglycone structural types: 3p-hydrox>iiolost-9(ll)-ene, 3p-hydrox5*iolost-7-ene and nonholostane based aglycones. This communication offers a general view of the s...

Mutual carbox-yl-carboxyl O-H⋯O hydrogen bonds link the mol-ecules of the title compound, C7H5BrO3, into centrosymmetric dimers which display a central R 2 (2)(8) ring motif. In addition, there is an intra-molecular hydrox-yl-carboxyl O-H⋯O inter-action present. A comparison with the crystal structures of 59 other substituted derivatives of salicylic acid shows that both the centrosymmetric car...

The title mol-ecule, C(17)H(19)NO(5), was prepared by a Hantzsch dihydro-pyridine synthesis from 4-hy-droxy-benzaldehyde, methyl acetoacetate and NH(4)HCO(3). In the mol-ecular structure of the title compound, the dihydro-pyridine ring adopts a flattened boat conformation and the plane of the base of the boat forms a dihedral angle of 80.8 (2)° with the aromatic six-membered ring. The packing i...

Elec tro mutive-force me thods a nd ce ll s without liquid junc tion have been uti lized to de te rmine the ac id ic d issociati on co ns tant of protona ted tri s(hydrox ymethyl)a minome th a ne 12-amino-2-(hydrox yme th yl)1, 3p ropa nedi ulJ in 50 wt pe rcent methanol so lve nt a t seve n te mperatures fro m ]0 to 40 °C. Th e c hange of the di ssoc iat ion cons ta nt with te mpera ture has b...

The title compound, (C(4)H(8)N(3)O)(H(3)O)[Co(C(7)H(3)NO(4))(2)]·3H(2)O, contains a protonated creatininium cation, a hydrox-onium (H(3)O)(+) cation, a [Co(pydc)(2)](2-) (pydcH(2) = pyridine-2,6-dicarboxylic acid) complex anion, and three uncoordinated water mol-ecules. The Co(II) atom is coordinated by four O and two N atoms from two pydc ligands in a distorted octa-hedral environment. The str...