5''-(4-Chloro-benzyl-idene)-4'-(4-chloro-phen-yl)-5-fluoro-1',1''-dimethyl-indoline-3-spiro-2'-pyrrolidine-3'-spiro-3''-piperidine-2,4''-dione.

The piperidine ring of the title compound, C(30)H(26)Cl(2)FN(3)O(2), adopts a twisted chair conformation. The pyrrolidine ring has a twisted envelope structure with the N atom at the flap [displaced by 0.592 (3) Å]. The fluoro-oxindole, chloro-phenyl and chloro-benzyl-idene groups are planar with r.m.s. deviations of 0.0348, 0.0048 and 0.0048 Å, respectively. The structure is stabilized by inter-molecular N-H⋯O hydrogen bonds.

1,1'-[4-(2,4-Dichloro-phen-yl)-2,6-di-methyl-1,4-di-hydro-pyridine-3,5-di-yl]diethanone.

In the title compound, C(17)H(17)Cl(2)NO(2), the central 1,4-dihydro-pyridine ring adopts a flattened-boat conformation. The ethanone substituents of the dihydro-pyridine ring at positions 3 and 5 have synperiplanar (cis) or anti-periplanar (trans) conformations with respect to the adjacent C=C bonds in the dihydro-pyridine ring. The 2,4-dichloro-phenyl ring is almost planar [r.m.s. deviation = 0.0045 (1) Å] and almost perpendicular [89.27 (3)°] to the mean plane of the dihydro-pyridine ring. In the crystal, an N-H⋯O hydrogen bond links mol-ecules into a zigzag chain along the ac diagonal. C-H⋯Cl contacts form centrosymmetric dimers and additional weak C-H⋯O contacts further consolidate the packing.

Ethyl 4-(dimethyl-amino)benzoate.

Mol-ecules of the title compound, C(11)H(15)NO(2), are essentially planar (r.m.s. deviation = 0.035 Å) and are linked into a chain along the a axis by weak C-H⋯O hydrogen bonds.

l-Asparagine-l-tartaric acid (1/1).

In the title compound, C(4)H(8)N(2)O(3)·C(4)H(6)O(6), the amino acid mol-ecule exists as a zwitterion and the carb-oxy-lic acid in an un-ionized state. The tartaric acid mol-ecules are linked into layers parallel to the ab plane by O-H⋯O hydrogen bonds. The amino acid mol-ecules are also linked into layers parallel to the ab plane by N-H⋯O and C-H⋯O hydrogen bonds. The alternating tartaric acid and amino acid layers are linked into a three-dimensional framework by N-H⋯O and O-H⋯O hydrogen bonds.

(E)-1,1,4,4-Tetra-phenyl-but-2-yne-1,4-diol.

The mol-ecule of the title compound, C(28)H(22)O(2), is centrosymmetric with the inversion centre located at the mid-point of the C C bond [1.178 (5) Å]. The hydroxyl groups therefore lie on either side of the mol-ecule. The crystal structure is stabilized by O-H⋯O hydrogen bonds, leading to the formation of a linear supra-molecular chain along the b axis.

rac-2-Hy-droxy-2-(2-oxocyclo-pent-yl)-1H-indene-1,3(2H)-dione.

In the title compound, C(14)H(12)O(4), the indene unit is essentially planar [r.m.s. deviation = 0.0309 (1) Å] and the cyclo-penta-none ring adopts a twist form. In the crystal, mol-ecules are joined via pairs of O-H⋯O hydrogen bonds into centrosymmetric dimers.

3-Acetyl-6-chloro-4-phenyl-quinolin-2(1H)-one.

The title compound, C(17)H(12)ClNO(2), crystallizes with two mol-ecules in the asymmetric unit. The main conformational difference between these two mol-ecules is the dihedral angle between the phenyl ring and the quinoline ring system [70.5 (1)° and 65.5 (1) Å]. The crystal packing is stabilized by N-H⋯O hydrogen bonds.

Methyl 6-chloro-2-methyl-4-phenyl-quinoline-3-carboxyl-ate.

In the title compound, C(18)H(14)ClNO(2), the quinoline ring system is planar (r.m.s. deviation = 0.032 Å) and the phenyl ring is twisted away from it by 57.5 (1)°. The crystal structure is stabilized by weak C-H⋯π inter-actions.

Synthesis, growth, crystal structure and characterization of a new organic material: glycine glutaric acid.

Glycine glutaric acid, a new organic compound has been synthesized and good quality single crystals were grown by slow evaporation technique. The structure of the grown crystal was elucidated by using single crystal XRD. The presence of the functional groups was confirmed by using FT-IR spectroscopy. The optical transparency was studied by using UV-vis spectrophotometer and it was found that the crystal is having high optical transparency. The thermal stability of the crystal was studied by using thermo-gravimetric and differential thermal analyses and found that it is stable up to 150°C. The room temperature dielectric studies were also carried out over the wide frequency range: 10 mHz to 10 MHz.