Desmotrope Formen bei Oxalessigester-Derivaten, insbesondere beim Diphenyl-methyl-oxalessigester oder Oxal-β-β-diphenyl propionsäureester
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چکیده
منابع مشابه
4-(4-Methoxyphenyl)-4-methyl-2,6-diphenyl-4H-thiopyran
The asymmetric unit of the title compound, C(25)H(22)OS, comprises two similar 4-(4-methoxy-phen-yl)-4-methyl-2,6-diphenyl-4H-thio-pyran mol-ecules. In each, the six-membered thio-pyran ring adopts a planar conformation (r.m.s. deviation of 0.041Å for the ring in one mol-ecule and 0.008 Å in the other). The methoxy-phenyl substituent is in a pseudo-axial position. The crystal studied is an inve...
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In the title compound, C16H16N2, the dihydro-pyrazole ring adopts a shallow envelope conformation, with the C atom bearing the phenyl group displaced by 0.298 (2) Å from the other atoms (r.m.s. deviation = 0.015 Å). The dihedral angles between the four near coplanar atoms of the central ring and the N- and C-bonded phenyl groups are 13.49 (13) and 82.22 (16)°, respectively.
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The complete mol-ecule of the title compound, C(12)H(10)ClO(2)PS, is generated by crystallographic mirror symmetry, with the P, S and Cl atoms lying on the mirror plane. The resulting PO(2)SCl tetra-hedron is significantly distorted [O-P-O = 96.79 (9)°]. The crystal packing exhibits no directional inter-actions.
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The title compound, C(18)H(20)N(2)O, crystallizes with two mol-ecules in the asymmetric unit. The seven-membered ring in both mol-ecules adopts a distorted chair conformation. The dihedral angles between the phenyl rings are 43.2 (1) and 54.7 (1)° in the two mol-ecules. The crystal packing features N-H⋯O and weak N-H⋯π and C-H⋯π inter-actions.
متن کامل2-Methyl-3-(4-methylphenyl)-5,6-diphenyl-2,3-dihydropyrazine
In the title mol-ecule, C(24)H(22)N(2), four atoms (N-C-C-N) of the heterocyclic ring, with their attached H atoms, and all atoms of the methyl group, are disordered over two positions; the site-occupancy factor of the major component is 0.713 (6). The major disorder component of the heterocyclic ring adopts a half-chair conformation, with all substituents equatorial. The benzene ring adjacent ...
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ژورنال
عنوان ژورنال: Berichte der deutschen chemischen Gesellschaft
سال: 1917
ISSN: 0365-9496,1099-0682
DOI: 10.1002/cber.19170500141