6-Hydrazinylnicotinic acid: a powder study

6-Hydrazinylnicotinic acid: a powder study

The structure of the title compound, C(6)H(7)N(3)O(2), is of inter-est with respect to radiopharmacueticals. The crystal packing is characterized by N-H⋯O and O-H⋯N hydrogen bonds, which form a three-dimensional network. The molecule is planar except for one of the amine H atoms.

A Study on the Kinetic and Thermodynamic Parameters of Different Acid Dyes on Nylon 6 Fibers

4′-(2,5,8,11,14-Penta­oxabicyclo­[13.4.0]nona­deca-15,17,19-trien-17-yl­oxy)-2,2′:6′,2′′-terpyridine: a powder study

The central pyridine ring of the 2,2':6',2''-terpyridine fragment of the title compound, C(29)H(29)N(3)O(6), forms dihedral angles of 5.2 (5), 10.1 (5) and 86.0 (6)°, respectively, with the two outer pyridine rings and the benzene ring of the benzo-15-crown-5 fragment.

Trihexyphenidyl hydro­chloride: a powder diffraction study

IN THE CATION OF THE TITLE COMPOUND [SYSTEMATIC NAME: 1-(3-cyclo-hexyl-3-hy-droxy-3-phenyl-prop-yl)piperidinium chloride], C(20)H(32)NO(+)·Cl(-), the cyclo-hexyl and piperidine rings are in chair conformations. In the crystal structure, cations and anions are linked into chains along the c-axis direction via O-H⋯Cl and N-H⋯Cl hydrogen bonds. Weak inter-molecular C-H⋯Cl inter-actions link furthe...

β-Polymorph of phenazepam: a powder study

THE TITLE COMPOUND [SYSTEMATIC NAME: 7-bromo-5-(2-chloro-phen-yl)-1H-1,4-benzodiazepin-2(3H)-one] (β-polymorph), C(15)H(10)BrClN(2)O, has been obtained via cryomodification of the known α-polymorph of phenazepam [Karapetyan et al. (1979 ▶). Bioorg. Khim.5, 1684-1690]. In both polymorphs, the mol-ecules, which differ only in the dihedral angles between the aromatic rings [75.4 (2)° and 86.2 (3)°...