Methyl 4-hydroxy-3-nitrobenzoate, (I), C8H7NO5, crystallizes with two unique molecules, A and B, in the asymmetric unit of the triclinic unit cell. The space group was assigned as P-1, with lattice parameters a = 0.72831(15), b = 1.0522(2), c = 1.1410(2) nm, α = 83.38(3), β = 80.83(3), γ = 82.02(3)°, Z = 4, V = 0.8510(3) nm, Mr = 197.15, Dc = 1.539 g/m , μ= 0.131 mm, F(000) = 408, R = 0.1002 an...

The co-crystals of squaric acid with dipyridyl-type ligands, 1 and 2, are isomorphous and form in the triclinic crystal system. The co-crystals contain linear and flat hydrogen-bonded molecular tape structures along the [120] direction (Figure 1). The squarate monoanions form a rare ten-membered dimer linked by two intermolecular O–H···O hydrogen bonds [2.511(3) Å for 1 and 2.503(2) Å for 2]. E...

The crystal structure, electrical resistivity, magnetic susceptibility, and heat capacity of single crystals of BaFe2As2, BaNi2As2, and BaFeNiAs2 are reported. BaFe2As2 data indicate the equivalence of C T , d T /dT, and d /dT results in determining the antiferromagnetic transition at TN=132 1 K. BaNi2As2 shows a structural phase transition from a high-temperature tetragonal phase to a low-temp...

Crystal-to-crystal transformation is a path to obtain crystals with different crystal structures and physical properties. K2[Co(C2O4)2(H2O)2]·4H2O (1) obtained from K2C2O4·2H2O, CoCl2·6H2O in H2O yield of 60%. It crystallized the triclinic space group P1 cell parameters: = 7.684(1) Å, b 9.011(1) c 10.874(1) ? 72.151(2)°, ? 70.278(2)°, ? 80.430(2)°, V 670.0(1) Å3, Z 2 at 100 K. 1 composed K+, mo...

The copper(II) complex [Cu(pic)2]·2H2O was synthesized with 2-picolinic acid (Hpic) and copper acetate as reactants by room temperature solid-solid reaction. The composition and structure of the complex was characterized by elemental analyses, single crystal X-ray diffraction, X-ray powder diffraction, FT-IR spectroscopy and thermogravimetry-differential scanning calor...

A new cobaloxime was synthesized by the reaction of cobalt chloride and diphenylglyoxime in methanol, followed by the addition of 4′-(4-pyridyl)-2,2′:6′,2′′-terpyridine, pytpy. This complex was characterized by UV–Vis spectroscopy, 1H-NMR spectroscopy, cyclic voltammetry, and single-crystal X-ray diffraction analysis. In cyclic voltammetry experiments an irreversible reduction wave assigned to ...

A new ortho-rhom-bic polymorph of the title compound, C30H24N4, with a density of 1.315 Mg m(-3), has been obtained. The mol-ecule is centrosymmetric with the centroid of the cyclo-hexa-1,4-diene ring located on an inversion center. The two unique benzene rings are almost perpendicular to each other [dihedral angle = 86.70 (6)°] and are oriented at dihedral angles of 30.79 (5) and 68.07 (5)° wi...

The title Schiff base compound, C(21)H(26)N(2)O(4), is a second triclinic polymorph of a previously reported room-temperature structure [Jia (2009 ▶). Acta Cryst. E65, o646]. Strong intra-molecular O-H⋯N hydrogen bonds generate S(6) ring motifs. Inter-molecular C-H⋯O inter-actions link neighbouring mol-ecules into dimers with an R(2) (2)(16) ring motif. The mean planes of the two benzene rings ...

As a result of the direct synthesis through oxidative dissolution of metallic copper powder in the presence of phthalimide and sodium hydride a new polymeric bimetallic coordination compound [Cu(phthal)4Na2(PrOH)2H2O]n was synthesized and characterized by a single crystal X-ray crystallography and IR spectroscopy. The copper(II) ions have a distorted tetrahedral environment (CuN4), while the co...