Bis(2-amino-1,3-thia­zole-κN 3)diazido­zinc

In the title complex, [Zn(N3)2(C3H4N2S)2], the ZnII atom is tetra­hedrally coordinated by two terminal azide ligands and by the ring N atoms of two different 2-amino­thia­zole ligands. Intra­molecular N—H⋯N hydrogen bonds between the amino groups of both 2-amino­thia­zole ligands and the N atom of one of the azide ligands ensure that the heterocyclic rings are oriented in the same direction. Inter­molecular N—H⋯N hydrogen bonds link the mol­ecules into zigzag sheets in the ac plane

Bis(2-amino­benzothia­zole-κN 1)bis­(thio­cyanato-κN)zinc(II)

The ZnII ion in the title complex, [Zn(NCS)2(C7H6N2S)2], is tetra­hedrally coordinated within an N4 donor set defined by two N atoms of two terminal isothio­cyanate ligands and by two heterocyclic N atoms of two different 2-amino­benzothia­zole ligands. This arrangement is stabilized by intra­molecular N—H⋯N hydrogen bonds. In the crystal structure, mol­ecules are linked through N—H⋯S hydrogen bonds to form a two-dimensional array

Methyl 9-diethyl­amino-2,2-bis­(4-meth­oxy­phen­yl)-2H-benzo[h]chromene-5-carboxyl­ate

In the title compound, C31H29NO5, the methyl carboxyl­ate and dimethyl­amino groups on the naphtho­pyran group are almost coplanar with the naphtho­pyran ring system [r.m.s. deviations = 0.08 (2) and 0.161 (2) Å, respectively]. The dihedral angle between the methyl carboxyl­ate and dimethyl­amino groups is 4.9 (1)°. The pyran ring has an envelope conformation with the quaternary C atom out of plane by 0.4739 (13) Å. The meth­oxy­phenyl substituent forms a dihedral angle of 16.6 (1)° with the plane of the benzene ring, while the other meth­oxy­phenyl group is almost coplanar, making a dihedral angle of 1.4 (1)°

N,N-Diethyl-4-[9-meth­oxy-6-(4-methoxy­phen­yl)-5-methyl-2-phenyl-2H-benzo[h]chromen-2-yl]aniline

In the title compound, C38H37NO3, the pyran ring has an envelope conformation with the quaternary Cq atom as the flap atom. The dihedral angle formed between the meth­oxy­phenyl group and the naphthalene ring system is 67.32 (6)°. The ethyl­amino groups lie to the same side of the plane through the phenyl ring and form dihedral angles of 84.6 (3) and 75.8 (2)° with it

Tetra­kis(2-amino­thia­zole-κN 3)dichloridocadmium(II)

In the title complex, [CdCl2(C3H4N2S)4],the CdII atom has an trans-Cl2N4 octa­hedral coordination geometry defined by four N atoms derived from the four 2-amino­thia­zole ligands and two Cl atoms. The amino groups participate in intra- and inter­molecular N—H⋯N and N—H⋯Cl hydrogen bonding that stabilizes both the mol­ecular and crystal structures

(7-Dimethylamino-1-hydroxy-3-naphthyl)(morpholino)methanone

In the title compound, C17H20N2O3, the morpholine ring is in a slightly distorted chair form. The crystal structure is stabilized by an inter­molecular O—H⋯O hydrogen bond between the H atom of the hydroxyl group and the O atom of a neighbouring carbonyl group. A weak inter­molecular C—H⋯π inter­action is also present

(S)-[5-Methyl-3-(3-methyl­thio­phen-2-yl)-4,5-dihydro­isoxazol-5-yl]methanol

In the title compound, C10H13NO2S, the thio­phene and isoxazoline rings are almost coplanar, the dihedral angle between their least-squares planes being 2.08 (1)°. The O—H atoms of the methyl hy­droxy group and the N atom of the isoxazole ring are orientated in the same direction to allow for the formation of inter­molecular O—H⋯N hydrogen bonds that lead to a supra­molecular chain along the a axis

[5-Hydroxy-3-phenyl-1-(pyridin-2-yl)pyrazol-5-olato]diphenylboron

In the title compound, C26H20BN3O, the B atom has tetra­hedral geometry and is linked to two phenyl rings, the O atom of the hy­droxy­pyrazole ring and the N atom of the pyridinyl ring. A six-membered BOCNCN ring forms by coordination of the B atom and the pyridinyl N atom. The BOCNCN ring has an envelope conformation [dihedral angle = 36.7 (1)° between the planar ring atoms and the flap] with the B atom out of the plane. In the 1-(2-pyridin­yl)-3-phenyl-5-hy­droxy­pyrazole group, the pyridinyl ring, the phenyl ring and the pyrazole ring are almost coplanar: the pyrazole ring makes a dihedral angle of 9.56 (8)° with the pyridinyl ring and 17.68 (7)° with the phenyl ring. The crystal structure is stabilized by π–π stacking inter­actions involving the pyridinyl and pyrazole rings of centrosymmetrically related mol­ecules, with ring centroid separations of 3.54 (5) Å

Synthesis, spectroscopic characterization and thermal behavior of cadmium(II) complexes of S-methyldithiocarbazate (SMDTC) and S-benzyldithiocarbazate (SBDTC): X-ray crystal structure of [Cd(SMDTC)(3)] center dot 2NO(3)

Two new cadmium(II) complexes of the empirical formulae [Cd(SMDTC)(3)] center dot 2NO(3) (1) and [Cd(SBDTC)(2)]center dot 2NO(3) (2) have been synthesized and characterized by elemental analyses, UV-Vis, IR, (1)H NMR and TGA techniques. In Complex 1, the six coordination sites around cadmium are occupied by three neutral SMDTC molecules with N and S donor atoms from each ligand molecule, whereas in complex 2 the cadmium center is four coordinated with two relatively larger SBDTC ligands chelating with N and S donor atoms in the neutral thione form. In the solid state, thermal gravimetric analysis shows that both complexes are relatively volatile in nature and undergo facile thermal decomposition above 120 degrees C to form the metal sulfide followed by stepwise loss of ligand molecules. The crystal and molecular structure of complex I has been established by the X-ray diffraction method. The central cadmium(II) atom has an octahedral geometry with three five-membered chelate rings formed by SMDTC ligands. The crystal structure consists of parallel layers of cations and anions. The SMDTC molecules in cations are arranged with their N donor groups directed towards the anion layer in all alternating fashion and form hydrogen bonds with the O atoms of the anion. (C) 2008 Elsevier Ltd. All rights reservedclose1

Synthesis of nanocrystalline CdS from cadmium(II) complex of S-benzyl dithiocarbazate as a precursor

The single X-ray crystal structure of the cadmium(II) S-benzyl dithiocarbazate (SBDTC) complex. [Cd (SBDTC)Cl(2)](2), is reported. The compound has been found to be an effective single-source precursor for the preparation of CdS nanocrystals (NCs) via solvothermal method. CdS NCs including spheres and rods were prepared at a relatively low temperature by thermolysis of the precursor using chelating solvent like ethylene glycol (EG), ethylenediamine (EN), hydrazine hydrate (HH) or in a mixture of EG and EN. The influence of solvent, temperature and reaction time was investigated on the size and morphology of the NCs. Use of EG afforded spherical CdS NCs while EN uniquely yielded rod-shaped NCs, and mixture of spheres and rods are obtained from the mixture of EN and EG with a ratio 0.2 (v/v: EN/EG). UV-visible spectroscopy established pronounced quantum confinement with enhanced band gap and XRD analyses revealed hexagonal crystal phase for so obtained CdS NCs. The NCs were also characterized by transmission electron microscopy (TEM), photoluminescence spectroscopy (FL), energy-dispersive X-ray spectroscopy (EDS) and FTIR. The possible formation mechanism for the anisotropic growth of NCs was also discussed. (C) 2010 Elsevier Masson SAS. All rights reservedclose