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[PDF] Top 20 A second polymorph of (Z) 3 amino 4 (2 phenyl­hydrazinyl­­idene) 1H pyrazol 5(4H) one

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A second polymorph of (Z) 3 amino 4 (2 phenyl­hydrazinyl­­idene) 1H pyrazol 5(4H) one

A second polymorph of (Z) 3 amino 4 (2 phenyl­hydrazinyl­­idene) 1H pyrazol 5(4H) one

... Synthetic purine (Hamad & Derbala, 2001) and pyrazole (Elgazwy, 2003; Madkour & Elgazwy, 2007) analogues find numerous applications in clinical medicine and medical research. As part of our work directed towards ... See full document

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A second polymorph of (+) pinoresinol–dioxane (1/1)

A second polymorph of (+) pinoresinol–dioxane (1/1)

... (+)-Pinoresinol, (Ia), was originally isolated from softwood species (Erdtman, 1955) but has later been found to be a widely distributed constituent of plant extractives. Its absolute con®guration was determined by ... See full document

10

A second polymorph of 4,5 di­phenyl 1H imidazole

A second polymorph of 4,5 di­phenyl 1H imidazole

... 2003). One of our current interests is to use monodentate imidazoles and benzimidazoles as building blocks to synthesize bis-chelating ligands which are useful for preparing metal-ion complexes with unusual ... See full document

9

1,3 Di­cyclo­hexyl­imidazolidine 2,4,5 trione: a second polymorph

1,3 Di­cyclo­hexyl­imidazolidine 2,4,5 trione: a second polymorph

... a second polymorph, which was obtained by crystallization from an ethanol solution at 253 K, instead of slow evaporation of the same solvent at room ...first polymorph [Talhi et ...this second ... See full document

9

A second polymorph of p nitro­benz­amide

A second polymorph of p nitro­benz­amide

... The molecules are linked by symmetric three-centre NÐ H Onitro2, and NÐH Oamide hydrogen bonds to form layers parallel to the bc plane... Comment The structure of the title compound, I[r] ... See full document

9

A second polymorph of bis­(o nitro­phenyl) carbonate

A second polymorph of bis­(o nitro­phenyl) carbonate

... As part of our investigations of the structure and reactivity of organic carbonates, we have begun to study the solid state structures of some organic carbonates. Here we present the structure of (I). This had already ... See full document

9

Crystal structure of a second polymorph of tetra­kis­(pyridin 2 yl)methane

Crystal structure of a second polymorph of tetra­kis­(pyridin 2 yl)methane

... reported. The original polymorph was solved by our group [Matsumoto et al. (2003). Tetrahedron Lett. 44, 2861–2864] in the monoclinic space group C2/c and refined to R = 0.050. Now the crystal structure of a ... See full document

6

Cs[Tf2N]: a second polymorph with a layered structure

Cs[Tf2N]: a second polymorph with a layered structure

... C2/c for the known polymorph [Xue et al. (2002). Solid State Sci. 4, 1535–1545]. The caesium ions in the cationic layers are coordinated by the sulfonyl groups of the bistriflimide molecules from anion layers ... See full document

8

A second polymorph of [1,2 bis­­(di tert butyl­phosphino)ethane]di­chlorido­platinum(II)

A second polymorph of [1,2 bis­­(di tert butyl­phosphino)ethane]di­chlorido­platinum(II)

... lengths of 2.2536 (8) and 2.2513 (8) A ˚ and the Pt—Cl bond lengths of 2.3750 (8) and 2.3588 (8) A ˚ are normal. This crystal form is a polymorph of a structure reported previously [Harada, Kai, Yasuoka & ... See full document

9

Crystal structure of a second polymorph of tricarbon­yl(N methyl­pyridine 2 carboxamide κ2N1,O)(thio­cyanato κN)rhenium(I)

Crystal structure of a second polymorph of tricarbon­yl(N methyl­pyridine 2 carboxamide κ2N1,O)(thio­cyanato κN)rhenium(I)

... (with one bidentate and one monodentate ligand) are still widely studied because of their interesting photophysical and photochemical properties (Pizarro et ... See full document

8

A second polymorph with composition Co3(PO4)2·H2O

A second polymorph with composition Co3(PO4)2·H2O

... cations are bridged by two independent orthophosphate anions. Two of the metal cations exhibit a distorted tetrahedral coordination while the third exhibits a considerably distorted [5 + 1] octahedral coordination ... See full document

8

A second polymorph of β arteether

A second polymorph of β arteether

... reported here is a polymorph of the structure first reported by El-Feraly, Al-Yahya, Orabi, McPhail & McPhail [J. Nat. Prod. (1992). 55, 878–883]. It is a derivative of the antimalaria compound artemisinin and ... See full document

10

A second polymorph of (5,10,15,20 tetra­phenyl­porphyrinato)copper(II)

A second polymorph of (5,10,15,20 tetra­phenyl­porphyrinato)copper(II)

... The structure of the title compound, (I), in space group I42/d has been previously reported (Fleischer, 1963; Fleischer et al. 1964). In that structure, the cell parameters were a = 15.03 (1) and c = 13.99 (1) A ˚ . ... See full document

5

A second polymorph of 2,5 di­bromo­anilinium bromide

A second polymorph of 2,5 di­bromo­anilinium bromide

... compounds; this involves hydrophilic layers with rings of NÐ H halide hydrogen bonds, generally supported by halogen± halogen interactions. We have now, by chance, determined the structure of a second form of the ... See full document

6

A second polymorph of 3,5 di­bromo­pyridinium bromide

A second polymorph of 3,5 di­bromo­pyridinium bromide

... in one important respect; the higher symmetry of the layers (4/mmm), in which the NÐH bonds of neighbouring rings are exactly antiparallel and `share' two bromides via three-centre hydrogen bonds, thus forming ... See full document

8

Crystal structure of a second monoclinic polymorph of 3 meth­­oxy­benzoic acid with Z′ = 1

Crystal structure of a second monoclinic polymorph of 3 meth­­oxy­benzoic acid with Z′ = 1

... the second polymorph, inversion dimers linked by O—H O hydrogen bonds occur and these are linked into zigzag chains, propagating along the b-axis direction by C— H O ...The second polymorph of ... See full document

7

A second crystal polymorph of anilinium picrate

A second crystal polymorph of anilinium picrate

... As a continuing project involving the systematization of the hydrogen-bonding modes in charge-transfer compounds of 3,5-dinitrosalicylic acid (DNSA) with Lewis bases, the crystal structures of more than 40 such compounds ... See full document

9

Crystal structure of a new polymorph of 3 acetyl 8 meth­­oxy 2H chromen 2 one

Crystal structure of a new polymorph of 3 acetyl 8 meth­­oxy 2H chromen 2 one

... The disposition of the crystalline lattices of coumarin derivatives is driven by a great variety of intermolecular interactions (Santos-Contreras et al., 2009). This working group has reported the participation of – ... See full document

9

A second monoclinic polymorph of (E) phen­yl(pyridin 2 yl)methanone oxime

A second monoclinic polymorph of (E) phen­yl(pyridin 2 yl)methanone oxime

... tranquillizers (Abele et al., 2003). Additionally, pyridil oximes are used in the preparation of complexes with a variety of transition metals, binding to metals in different forms most commonly as chelates or serving as ... See full document

6

Vol 3, No 6 (2014)

Vol 3, No 6 (2014)

... It is clear from the Figure 5 that isodensity plot for the HOMO is well localized symmetrically over the cyclopentanone and on ipso, ortho and para position of the phenyl rings where the LUMO is populated on ... See full document

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