[PDF] Top 20 6,8 Dibromo 4 oxo 4H chromene 3 carbaldehyde
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6,8 Dibromo 4 oxo 4H chromene 3 carbaldehyde
... dibromochromone unit are essentially coplanar [largest deviation from the mean planes = 0.1109 (3) A ˚ ] and the formyl group is twisted slightly with respect to the attached ring [C—C—C—O torsion angles = 11.5 ... See full document
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Crystal structure of 7 iodo 4 oxo 4H chromene 3 carbaldehyde
... We have previously reported the crystal structures of 6,8-dichloro-4-oxochromene-3-carbaldehyde (6,8-dichloro-3- formylchromone; Ishikawa & Motohashi, 2013) and 6,8-di- ... See full document
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Crystal structure of 8 bromo 4 oxo 4H chromene 3 carbaldehyde
... chromone, all atoms are essentially coplanar (r.m.s. = 0.0104 A ˚ for the non-H atoms), with the largest deviation from the least-squares plane [0.028 (5) A ˚ ] being for one of the benzene C atoms. In the crystal, ... See full document
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6 Chloro 4 oxo 4H chromene 3 carbaldehyde
... In the crystal, the molecules are stacked with the inversion-symmetry equivalents along the b -axis direction [centroid– centroid distance between the pyran rings of the 4 H -chromene units = 3.926 (2) Å, i ... See full document
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Crystal structures of ethyl 6 (4 methylphenyl) 4 oxo 4H chromene 2 carboxylate and ethyl 6 (4 fluorophenyl) 4 oxo 4H chromene 2 carboxylate
... as 6-(phenyl)-4-oxo-4H-chromene-2-carboxylate, 6-(4-methoxy- phenyl)-4-oxo-4H-chromene-2-carboxylate and 6-(4-3,4-di- ... See full document
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3 Methyl 4 oxo 2 phenyl 4H chromene 8 carboxylic acid
... O1 0.1144 (15) 0.0418 (9) 0.0473 (9) −0.0423 (10) 0.0084 (9) −0.0233 (7) O2 0.1327 (17) 0.0529 (10) 0.0399 (9) −0.0575 (11) 0.0093 (9) −0.0161 (8) O3 0.0565 (9) 0.0317 (7) 0.0375 (8) −0.0167 (6) ... See full document
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6 Fluoro 4 oxo 4H chromene 3 carbaldehyde
... F1 0.0315 (5) 0.0312 (5) 0.0153 (5) −0.0033 (4) 0.0012 (4) 0.0069 (4) O1 0.0222 (5) 0.0154 (5) 0.0157 (5) −0.0035 (4) 0.0014 (4) 0.0000 (4) O2 0.0223 (5) 0.0183 (5) 0.0204 (5) ... See full document
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8 Fluoro 4 oxo 4H chromene 3 carbaldehyde
... The mean deviation of the least-square planes for the non-hydrogen atoms of the 8-fluorochromone unit is 0.0259 Å, and the largest deviations is 0.0660 (12) Å for O2 (Fig. 1). These mean that these atoms are ... See full document
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6,8 Diiodo 4 oxo 4H chromene 3 carbaldehyde
... Halogen bonds have been found to occur in organic, inorganic, and biological systems, and have recently attracted much attention in medicinal chemistry, chemical biology and supramolecular chemistry (Auffinger et al. , ... See full document
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Crystal structure of 7,8 dichloro 4 oxo 4H chromene 3 carbaldehyde
... in 8-chloro-4-oxo-4H-chromene-3-carbalde- hyde ...dichlorinated 3-formylchromone, halogen bonding between the formyl oxygen atom and the chlorine atom at the ... See full document
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Crystal structure of 6,7 dichloro 4 oxo 4H chromene 3 carbaldehyde
... The mean deviation of the least-square plane for the non-hydrogen atoms of the 4H-chromene ring is 0.0188 Å, and the largest deviation is 0.043 (2) Å for the C3 atom (Fig. 2). The α,β-unsaturated carbonyl ... See full document
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Crystal structure of 4 (6 bromo 4 oxo 4H chromen 3 yl) 2 methylamino 3 nitropyrano[3,2 c]chromen 5(4H) one chloroform monosolvate
... 4-Hydroxycoumarin (0.81 g, 5 mmol), 6-bromo-4-oxo-4H-chromene-3-carbaldehyde (0.78 g, 5 mmol) and NMSM (0.74 g, 5 mmol) were mixed in ethanol at room ... See full document
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2 Amino 4 (4 bromophenyl) 6 methoxy 4H benzo[h]chromene 3 carbonitrile
... Data collection: CrysAlis PRO (Agilent, 2011); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 ... See full document
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Polymorphism in the structure of N (5 methylthiazol 2 yl) 4 oxo 4H chromene 3 carboxamide
... shown in Fig. 8. The FP plots highlight the differences in distribution of close contacts between mol#1 and mol#2. The asymmetric tails that are both present correspond to N H contacts in mol#1 and the sharp ... See full document
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Poly[(μ 5,7 dihydroxy 4 oxo 2 phenyl 4H chromene 8 sulfonato)potassium(I)]
... C6 0.069 (2) 0.0425 (17) 0.0366 (17) 0.0021 (15) 0.0032 (15) 0.0009 (13) C7 0.083 (2) 0.0437 (18) 0.0395 (17) 0.0045 (16) 0.0111 (16) 0.0056 (14) C8 0.067 (2) 0.055 (2) 0.047 (2) 0.0026 (16) 0.0066 (16) 0.0026 (15) C9 ... See full document
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Dimethyl 2,2′ [(4 oxo 2 phenyl 4H chromene 5,7 diyl)dioxy]diacetate: a more densely packed polymorph
... C11 0.0501 (11) 0.0446 (11) 0.0387 (10) −0.0061 (9) −0.0041 (8) −0.0063 (8) C12 0.0733 (14) 0.0501 (12) 0.0450 (12) 0.0026 (10) −0.0118 (10) −0.0074 (9) C13 0.0943 (17) 0.0586 (14) 0.0456 (12) 0.0007 (12) ... See full document
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The crystal structures of four N (4 halophenyl) 4 oxo 4H chromene 3 carboxamides
... chromene-2-carboxamides (Reis et al., 2013) and (Gomes et al., 2013), compounds (5) and (6). Previous studies concerning the structures of the chromone-2-carboxamides show that the majority have geometries ... See full document
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3 Hydroxy 4 oxo 2 phenyl 4H chromene 6 carboxylic acid dimethylformamide solvate
... O1 0.0649 (10) 0.0286 (7) 0.0388 (8) −0.0007 (6) −0.0058 (7) 0.0076 (6) O2 0.0744 (11) 0.0282 (7) 0.0535 (10) 0.0015 (7) −0.0126 (8) 0.0113 (7) O3 0.0748 (11) 0.0355 (8) 0.0476 (9) ... See full document
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Crystal structure of 4 oxo 4H chromene 3 carboxylic acid
... O1 0.0147 (7) 0.0167 (7) 0.0185 (7) −0.0005 (6) 0.0009 (6) 0.0031 (6) O2 0.0196 (7) 0.0168 (7) 0.0205 (8) 0.0020 (6) −0.0015 (6) 0.0056 (6) O3 0.0172 (7) 0.0263 (9) 0.0251 ... See full document
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6 Methyl 4 oxo 4H chromene 3 carbaldehyde
... Chromone is a heterocyclic compound containing a benzene ring fused with a pyran ring, so it is also called as benzo- pyran-4-one. Chromone moieties are associated with various physiological and biological ... See full document
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