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[PDF] Top 20 4,4′ Di­meth­oxy­benzo­phenone: a triclinic polymorph

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4,4′ Di­meth­oxy­benzo­phenone: a triclinic polymorph

4,4′ Di­meth­oxy­benzo­phenone: a triclinic polymorph

... a new triclinic polymorph. The asymmetric unit of the present structure, as in the previously reported monoclinic structure [Norment & Karle (1962). Acta Cryst. 15, 873–878], contains two independent ... See full document

9

A triclinic polymorph of 4 cyano­pyridinium hydrogen chloranilate

A triclinic polymorph of 4 cyano­pyridinium hydrogen chloranilate

... the triclinic polymorph of the title compound consists of two crystallographically independent cation–anion units, in each of which the cation and the anion are held together by N—H···O hydrogen ... See full document

9

Triclinic polymorph of 4 [4 (4 formyl­phen­­oxy)but­­oxy]benzaldehyde

Triclinic polymorph of 4 [4 (4 formyl­phen­­oxy)but­­oxy]benzaldehyde

... the triclinic polymorph the molecules are linked in centrosymetric dimers via weak C1— H1···O1 intermolecular interactions, as previously reported by Narasimha Moorthy et ...monoclinic polymorph the ... See full document

6

The crystal structure of the triclinic polymorph of 1,4 bis­­([2,2′:6′,2′′ terpyridin] 4′ yl)benzene

The crystal structure of the triclinic polymorph of 1,4 bis­­([2,2′:6′,2′′ terpyridin] 4′ yl)benzene

... orthorhombic polymorph, Form II, all the angles between side and central pyridine rings of the terpy units are different (because of the lack of symmetry elements inside the molecule), ... See full document

9

A triclinic polymorph of 1,4 di­benzoyl­butane

A triclinic polymorph of 1,4 di­benzoyl­butane

... The molecule lies on a centre of symmetry, with one-half molecule in the asymmetric unit. Whereas (I) is essentially planar (the r.m.s. deviation of all the non-H atoms is 0.019 AÊ), the monoclinic polymorph has ... See full document

5

Benzyl 2 (4 bromo­anilino) 4,4 di­methyl 6 oxo­cyclo­hex 1 enecarbodi­thio­ate: first triclinic polymorph

Benzyl 2 (4 bromo­anilino) 4,4 di­methyl 6 oxo­cyclo­hex 1 enecarbodi­thio­ate: first triclinic polymorph

... atom bearing the two methyl groups representing the flap. This atom deviates by 0.686 (4) A ˚ from the plane passing through the other five atoms of the ring (r.m.s. deviation = 0.025 A ˚ ). The molecular ... See full document

8

Benzyl 2 (4 bromo­anilino) 4,4 di­methyl 6 oxo­cyclo­hex 1 enecarbodi­thio­ate: second triclinic polymorph

Benzyl 2 (4 bromo­anilino) 4,4 di­methyl 6 oxo­cyclo­hex 1 enecarbodi­thio­ate: second triclinic polymorph

... envelope conformation, with the C atom bearing the two methyl groups representing the flap. This atom deviates by 0.674 (4) A ˚ from the plane passing through the other five atoms of the ring (r.m.s. deviation = ... See full document

11

A new triclinic polymorph of 4 n hexyl­oxybenzoic acid

A new triclinic polymorph of 4 n hexyl­oxybenzoic acid

... O2E 0.0352 (13) 0.0464 (15) 0.0248 (13) 0.0008 (11) −0.0044 (10) −0.0062 (11) O3E 0.0359 (13) 0.0466 (15) 0.0243 (12) 0.0014 (11) 0.0006 (10) −0.0038 (11) C1E 0.0303 (16) 0.0304 (17) 0.0225 (16) −0.0095 (13) 0.0002 (13) ... See full document

19

A triclinic polymorph of (E) 2 (4 iso­butyl­phen­yl) N′ [1 (4 nitro­phen­yl)ethyl­­idene]propano­hydrazide

A triclinic polymorph of (E) 2 (4 iso­butyl­phen­yl) N′ [1 (4 nitro­phen­yl)ethyl­­idene]propano­hydrazide

... The title compound is prepared by heating 2-(4-isobutylphenyl)propanehydrazide (0.01 mol) with p-nitroacetophenone- (0.01 mol), in the presence of catalytic amount of acetic acid, in ethanol (20 ml) at reflux ... See full document

13

A triclinic polymorph of hexa­nedioic acid

A triclinic polymorph of hexa­nedioic acid

... O1A 0.0225 (5) 0.0180 (4) 0.0144 (4) 0.0084 (4) 0.0033 (3) −0.0012 (3) O2A 0.0287 (5) 0.0185 (4) 0.0129 (4) 0.0113 (4) 0.0033 (4) −0.0023 (3) C1A 0.0165 (6) 0.0157 (6) ... See full document

7

2 (4 Fluoro­benzyl­­idene)propane­di­nitrile: monoclinic polymorph

2 (4 Fluoro­benzyl­­idene)propane­di­nitrile: monoclinic polymorph

... polymorph of the previously reported triclinic (P1) form [Antipin et al. (2003). J. Mol. Struct. 650, 1–20]. The 13 non-H atoms in the title polymorph are almost coplanar (r.m.s. deviation = 0.020 A ... See full document

8

Di μ chloro bis­­[(2,2′:6,2′′ ter­pyridine κ3N)copper(II)] diperchlorate: the triclinic polymorph

Di μ chloro bis­­[(2,2′:6,2′′ ter­pyridine κ3N)copper(II)] diperchlorate: the triclinic polymorph

... (m), 3080 (w), 2963 (w), 1630 (w), 1600 (m), 1578 (m), 1499 (w), 1475 (w), 1447 (m), 1408 (w), 1384 (w), 1329 (w), 1303 (w), 1290 (w), 1262 (m), 1185 (w), 1167 (w), 1099 (s), 1083 (s), 1050 (m), 1020 (s), 872 (w), 800 ... See full document

12

Crystal structure of a second triclinic polymorph of 2 methyl­pyridinium picrate

Crystal structure of a second triclinic polymorph of 2 methyl­pyridinium picrate

... (6) graph-set motifs. Numerous C—H O hydrogen bonds are observed between these cation–anion pairs, which result in a three-dimensional network. In addition, weak aromatic – stacking between the 2-methylpyridinium rings ... See full document

11

A second triclinic polymorph of azimsulfuron

A second triclinic polymorph of azimsulfuron

... pyrimidin-2-yl)-3-{[1-methyl-4-(2-methyl-2H-tetrazol-5-yl)pyrazol-5-yl]sulfon- yl}urea), is a second triclinic polymorph of this crystal [for the other, see: Jeon et al., (2015). Acta Cryst. E71, ... See full document

12

Crystal structure of 3 methyl­pyridinium picrate: a triclinic polymorph

Crystal structure of 3 methyl­pyridinium picrate: a triclinic polymorph

... to room temperature, filtered and the filtrate kept at 298 K. After a period of 4 weeks, dark shiny maroon-red–coloured crystals formed from the solution. The crystals were filtered, powdered and dried. The dry ... See full document

8

6 [(4′ Ethoxycarbonyl [1,1′ bi­phenyl] 4 yl)­oxy]hexanoic acid

6 [(4′ Ethoxycarbonyl [1,1′ bi­phenyl] 4 yl)­oxy]hexanoic acid

... 6.2 g (14 mmol) of benzyl 6-(ethyl 4′-oxydiphenyl-4-carboxylate)-hexanoate was added to 90 ml of dry ethyl acetate. 5% Pd—C (0.029 g) was then added with stirring. The hydrogenolisis was allowed to proceed ... See full document

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5,10,15,20 Tetra­kis­­[(4 ethyl­carbonyl)­­oxy]­phenyl­porphyrin† †

5,10,15,20 Tetra­kis­­[(4 ethyl­carbonyl)­­oxy]­phenyl­porphyrin† †

... A 250 ml three-necked round-bottomed ¯ask equipped with a magnetic stirring bar and a re¯ux condenser was charged with 4-hydroxybenzaldehyde (2.46 g, 20.2 mmol), acetic anhydride (12 ml), and propionic acid (100 ... See full document

13

Crystal structure of hexa­methyl 4,4′,4′′,4′′′,4′′′',4′′′'' [(1,3,5,2λ5,4λ5,6λ5 tri­aza­triphosphinine 2,2,4,4,6,6 hexa­yl)hexa­kis­(­­oxy)]hexa­benzoate

Crystal structure of hexa­methyl 4,4′,4′′,4′′′,4′′′',4′′′'' [(1,3,5,2λ5,4λ5,6λ5 tri­aza­triphosphinine 2,2,4,4,6,6 hexa­yl)hexa­kis­(­­oxy)]hexa­benzoate

... Hexakis(allyl 4-hydroxyben- zoate)cyclotriphosphazene (HABC) possessing six reactive peripheral allyl groups is used as a functional phosphazene- based oligomer for the synthesis of optical resin, through radical ... See full document

14

Coumarins via knoevenagel condensation reaction (KCR) and pechmann condesation reaction

Coumarins via knoevenagel condensation reaction (KCR) and pechmann condesation reaction

... Coumarin derivatives which were synthesized through Pechmann condensation reaction are summarized in Table 4.2. The reaction between resorcinol with ethyl acetoacetate in the presence of sulphuric acid through Pechmann ... See full document

16

A monoclinic polymorph of 1 benzoyl 4 thio­biuret

A monoclinic polymorph of 1 benzoyl 4 thio­biuret

... For the biological activity of thiadiazole derivatives, see: Piskala et al. (2004); Castro et al. (2008). For the structure and reactivity of thiadiazole derivatives, see: Cho et al. (1996). For the structure of a ... See full document

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