Crystal Structure of 3-Nitro-4-hydroxycoumarin
نویسندگان
چکیده
منابع مشابه
Crystal structure of 1-nitro-4-(trimethylsilylethynyl)naphthalene
In the title compound, C15H15NO2Si, the dihedral angle between the nitro group and the mean plane of the naphthalene system is 22.04 (11)°. In the crystal, π-π inter-actions generate supra-molecular chains propagating along the a-axis direction; the centroid-to-centroid distances range from 3.5590 (12) to 3.8535 (12) Å.
متن کاملCrystal structure of 2-methylamino-3-nitro-4-p-tolylpyrano[3,2-c]chromen-5(4H)-one
In the racemic title compound, C20H16N2O5, the pyran ring adopts a shallow envelope conformation, with the stereogenic C atom displaced from the other atoms by 0.273 (2) Å. The dihedral angle between the fused-ring system and the pendant p-tolyl group is 87.62 (7)°. The mol-ecular conformation is consolidated by an intra-molecular N-H⋯O hydrogen bond, which generates an S(6) ring. In the crysta...
متن کاملCrystal structure of 4-acetylphenyl 3-methylbenzoate
The planes of the aromatic rings of the title compound, C16H14O3, make a dihedral angle of 82.52 (8)°. The acetyl group and the phenyl ring make a dihedral angle of 1.65 (1)°. In the crystal, the molecules are linked by C-H⋯O interactions, generating C(7) chains along the a-axis direction.
متن کاملCrystal structure of 4-(4-methoxyphenyl)-7,7-dimethyl-2-methylamino-3-nitro-7,8-dihydro-4H-chromen-5(6H)-one
In the title compound, C19H22N2O5, the six-membered carbocyclic ring of the chromene moiety adopts an envelope conformation with the dimethyl-substituted C atom as the flap. The pyran ring has a flat-boat conformation. The meth-oxy-phenyl ring is orthogonal to the mean plane of the chromene moiety, with a dihedral angle of 89.97 (8)°. The amine N atom deviates from the chromene mean plane by 0....
متن کاملCrystal structure of diethyl 2-acet-oxy-2-[3-(4-nitro-phen-yl)-3-oxo-1-phenyl-prop-yl]malonate.
In the racemic title compound, C24H25NO9, the dihedral angle between the planes of the two benzene-ring systems is 80.16 (6)°, while the side-chain conformation is stabilized by a methyl-ene-carboxyl C-H⋯O hydrogen bond. Weak inter-molecular C-H⋯O hydrogen bonds form inversion dimers [graph set R 2 (2)(16)] which are linked into chains extending along a. Further C-H⋯O hydrogen bonding extends t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Analytical Sciences: X-ray Structure Analysis Online
سال: 2006
ISSN: 1348-2238
DOI: 10.2116/analscix.22.x103