STEROIDAL 3-CHLORO-3,5-DIENES
نویسندگان
چکیده
منابع مشابه
On the Optical Activity of Steroidal 5 , 7 - Dienes
Circular dichroism (CD) data are reported of a series of 9,10stereoisomeric steroidal 5,7-dienes. In general the effects in the longest wavelength transition (270-280 nm) are large (Mm" 10---30) and consignate with respect to the diene helicity rule. The magnitude of the CD appears to vary markedly with the substituent at C-3 and at C-17, and with solvent. In the case of the 9a,10p-H dienes, va...
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In the title compound, C(7)H(3)ClN(2)O(2), the Cl, C and N atoms are coplanar with the aromatic ring. In the crystal structure, weak inter-molecular C-H⋯O and C-H⋯N hydrogen bonds link the mol-ecules. The π-π contact between the benzene rings, [centroid-centroid distances = 3.912 (3) Å] may further stabilize the structure.
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The title compound, C8H9ClO, packs with two independent mol-ecules in the asymmetric unit, without significant differences in corresponding bond lengths and angles, with the ethyl group in each oriented nearly perpendicular to the aromatic ring having ring-to-side chain torsion angles of 81.14 (18) and -81.06 (19)°. In the crystal, mol-ecules form an O-H⋯O hydrogen-bonded chain extending along ...
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In the title compound, C(5)H(3)ClN(2)O(2), the nitro group is twisted by 38.5 (2)° with respect to the pyridine ring. In the crystal, adjacent mol-ecules are linked by non-classical C-H⋯N and C-H⋯O hydrogen bonds, forming a layer motif.
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In the crystal of the title compound, C(7)H(5)ClN(2)O(3), the molecules are linked by N-H⋯O and C-H⋯O hydrogen bonds. The π-π contact between the benzene rings, [centroid-centroid distance = 3.803 (3) Å] may further stabilize the structure.
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ژورنال
عنوان ژورنال: Canadian Journal of Chemistry
سال: 1963
ISSN: 0008-4042,1480-3291
DOI: 10.1139/v63-225