Isolation and X-ray crystal structure of tetrahydroisoquinoline alkaloids from Calycotome villosa Subsp. intermedias

Two tetrahydroisoquinoline alkaloids were extracted from the alkaloid fraction of a methanol extract of the seeds of Calycotome Villosa Subsp. intermedia. Their structures were established as (R)-1-hydroxymethyl-7-8-dimethoxy-1,2,3,4-tetrahydro- isoquinoline (1) and (S)-7-hydroxymethyl-2-3-dimethoxy-7,8,9,10-tetrahydroisoquinoline chloride (2) by spectroscopic techniques and X-ray diffraction analysis

1,4,8,11-Tetra­azoniacyclo­tetradecane diaqua­tetra­chloridomanganese(II) dichloride dihydrate

The title compound, (C10H28N4)[MnCl4(H2O)2]Cl2·2H2O, consists of isolated octa­hedral [MnCl4(H2O)2]2− anions, tetra­protonated 1,4,8,11-tetra­azoniacyclo­tetradecane cations, chloride anions and water mol­ecules connected by a network of hydrogen bonds. The MnII atom is situated on an inversion centre, and the 1,4,8,11-tetra­azoniacyclo­tetradecane cation is located on a mirror plane

Diammonium tris­[hexa­aqua­magnesium(II)] tetra­kis­[hydrogenphosphate(III)], (NH4)2[Mg(H2O)6]3(HPO3)4

The framework of the title compound is made up of discrete Mg(H2O)6 octa¬hedra, and HPO3 and NH4 tetra¬hedra, which are organized in planes parallel to (010). Strong hydrogen bonding between the building units stabilizes the structure. The hydrogenphosphate(III) tetra¬hedra, the ammonium tetra¬hedron and one of the two Mg atoms lie on positions with m symmetry, whereas the second Mg atom is located on a position with 2/m symmetry

N-(2-Phenyl­imidazo[1,2-a]pyridin-3-yl)acetamide

The crystal structure of the title compound, C15H13N3O, consists of columns of mol­ecules that are inter­connected by N—H⋯N hydrogen bonds in the direction of the b axis. The torsion angle between the imidazo[1,2-a]pyridine ring system and the phenyl ring is 9.04 (5)°

Ortho­rhom­bic polymorph of (6,7-dimeth­oxy-1,2,3,4-tetra­hydro­isoquinolin-1-yl)methanol

The asymmetric unit of the title compound, C12H17NO3, contains two mol­ecules with different conformations. It is a polymorph of the monoclinic form [El Antri et al. (2004 ▶). Mol­ecules, 9, 650–657]; the samples were crystallized at different temperatures from the same solvent. In both structures, mol­ecules are linked by O—H⋯N hydrogen bonds, forming chains. The conformations of the chains and their packing differ markedly in the two polymorphs

Crystal structure of NaCd(H2PO3)3·H2O and spectroscopic study of NaM(H2PO3)3·H2O, M= Mn, Co, Ni, Zn, Mg and Cd

NaCd(H2PO3)3·H2O was synthesized in solution and its structure was studied by single-crystal X-ray diffraction. It crystallizes in the orthorhombic system (Pbca, Z = 8) with the cell parameters: a = 9.2895(14) Å, b = 15.124(2) Å, c = 15.0592(12) Å. Final residual factors R/Rw are 0.0297/0.0790. Both Na+ and Cd2+ are octahedrally coordinated, [NaO6] and [CdO6] share edges to form zigzag chains along [1 0 0]. The 3D framework is build upon these chains which are interconnected by H2PO3 pseudo-pyramids and an intricate network of weak hydrogen bonds. NaCd(H2PO3)3·H2O belongs the series of isostructural phosphites NaM(H2PO3)3·H2O (M = Mn, Co, Ni, Zn and Mg). IR spectroscopic studies show the bands confirming the presence of the phosphite H2PO32− anion in the whole series NaM(H2PO3)3·H2O, M = Mn, Co, Ni, Zn, Mg and Cd. The UV–Vis spectroscopy was used for characterizing the d–d transitions in the Mn, Co and Ni phosphites.The financial support from Centre National de Recherche Scientifique et Technique (CNRST) (Morocco) (URAC 19). The institutional research plan No. AVOZ10100521 of the Institute of Physics and the grant “Praemium Academiae” of the Academy of Sciences of the Czech Republic

The triclinic form of dipotassium cobalt(II) bis­(dihydrogendiphosphate) dihydrate

In the title compound, K2Co(H2P2O7)2·2H2O, the octa­hedrally coordinated Co2+ ion lies on an inversion centre. Two bidentate dihydrogendiphosphate anions form the equatorial plane of the [CoO6] octa­hedron which is completed by two water mol­ecules in axial positions. This results in isolated {Co(H2O)2[H2P2O7]2}4− entities linked into a three-dimensional network through K—O bonds and O—H⋯O hydrogen-bonding inter­actions involving the dihydrogendiphosphate anions and water mol­ecules. The dihydrogendiphosphate anion, (H2P2O7)2−, is bent and shows an almost eclipsed conformation

Terbium(III) hydrogendiphosphate(V) tetra­hydrate

The Tb atom of the title compound, TbHP2O7·4H2O, is coordinated by the O atoms of three symmetrically independent water mol­ecules and by five O atoms belonging to HP2O7 − groups. The TbO8 polyhedra are inter­connected by the diphospate anions, forming a three-dimensional network which is additionally stabilized by O—H⋯O hydrogen bonding between water mol­ecules and O atoms of the HP2O7 − anions. Uncoordinated water mol­ecules are situated in channels and are connected via hydrogen bonds with the framework