Results 51 to 60 of about 87,109 (183)
Tetramethyl biphenyl-2,3,3′,4′-tetracarboxylate
Acta Crystallographica Section E, 2008 The asymmetric unit of the title compound, C20H18O8, contains two molecules with small geometric differences. The dihedral angles between the benzene rings are 62.94 (12) and 59.99 (12)°.
Jian Men +4 more
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3,5-Bis(4-fluorophenyl)-1-phenyl-4,5-dihydro-1H-pyrazole
Acta Crystallographica Section E, 2010 In the title compound, C21H16F2N2, the dihedral angle between the fluorophenyl groups is 66.34 (8)°, and the dihedral angle between the envelope-configured pyrazole group (N/N/C/C/C) and the benzene ring is 11.50 (9)°
Jerry P. Jasinski +4 more
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9-[4,5-Bis(benzylsulfanyl)-1,3-dithiol-2-ylidene]-4,5-diazafluorene
Acta Crystallographica Section E, 2008 In rhe title compound, C28H20N2S4, the 1,3-dithiol-2-ylidene and 4,5-diazafluoren-9-one (dafone) groups are almost coplanar, making a dihedral angle of only 5.65 (4)°.
Xu-Dong Zhong +4 more
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Darboux transformation with dihedral reduction group [PDF]
Journal of Mathematical Physics, 2014 We construct the Darboux transformation with Dihedral reduction group for the 2-dimensional generalisation of the periodic Volterra lattice. The resulting Bäcklund transformation can be viewed as a nonevolutionary integrable differential difference equation. We also find its generalised symmetry and the Lax representation for this symmetry.
Mikhailov, Alexander V +2 more
openaire +4 more sources
On the dihedral Euler characteristics of Selmer groups of abelian varieties
, 2014 This note shows how to use the framework of Euler characteristic formulae to study Selmer groups of abelian varieties in certain dihedral or anticyclotomic extensions of CM fields via Iwasawa main conjectures, and in particular how to verify the p-part ...
Van Order, Jeanine
core +1 more source
Acta Crystallographica Section E, 2014 In the title compound, C13H10N2O4, the nitro groups are twisted significantly relative to the benzene rings [dihedral angles = 16.64 (18) and 28.02 (11)°]. The benzene groups are nearly perpendicular to each other [dihedral angle = 87.72 (6)°].
Daron E. Janzen +3 more
doaj +1 more source
Algebraic K-theory over the infinite dihedral group: a controlled topology approach
, 2011 We use controlled topology applied to the action of the infinite dihedral group on a partially compactified plane and deduce two consequences for algebraic K-theory.
Davis, James F. +2 more
core +1 more source
[2-(3,4-Dimethylbenzoyl)phenyl](4-methoxyphenyl)methanone
Acta Crystallographica Section E, 2013 The title molecule, C23H20O3, is disordered with a 180° rotation about an axis normal to the length of the molecule, with the major and minor components in a 0.545 (5):0.455 (5) ratio.
Arasambattu K. Mohanakrishnan +3 more
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Bis(4-nitrophenyl) 1,3-phenylenedimethylene dicarbonate
Acta Crystallographica Section E, 2008 In the title molecule, C22H16N2O10, the dihedral angles between the benzene rings of the 4-nitrophenyl groups and the central benzene ring are 32.7 (1) and 34.7 (1)°, while the dihedral angle between the two benzene rings of the 4 ...
Alan J. Lough +3 more
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On commutation semigroups of dihedral groups [PDF]
Semigroup Forum, 2013 For G a group and g in G, we define mappings pg(G) and lg(G) from G into G by pg(x)=[x,g] and lg(x)=[g,x]. We let P(G) and L(G) denote the subsemigroups of the set of all mappings from G to G generated by {pg: g in G} and {lg: g in G}, respectively. P(G) and L(G) are called the right and left commutation semigroup of G, respectively.
DeWolf, Darien +2 more
openaire +2 more sources