On automorphisms of distance-regular graphs with intersection arrays {2r + 1, 2r − 2, 1; 1, 2, 2r + 1}
نویسندگان
چکیده
منابع مشابه
(2R)-N-(2-Benzoylphenyl)-1-benzylpyrrolidine-2-carboxamide
In the title compound, C(25)H(24)N(2)O(2), the dihedral angle between the two benzene rings of the benzophenone moiety is 59.10 (6)°. An intra-molecular, bifurcated N-H⋯(O,N) hydrogen bond, which generates S(6) and S(5) rings, respectively, helps to establish the overall conformation of the mol-ecule.
متن کامل(2R,3R)-1-(4-Chlorophenyl)-2-[(S)-2-nitro-1-phenylethyl]-3-phenylpentan-1-one
The title compound, C(25)H(24)ClNO(3), has three contiguous chiral centres. The absolute structure was determined by anomalous dispersion. The chloro-benzene ring is inclined to the two phenyl rings by 14.98 (9) and 59.05 (9)°. The two phenyl rings are inclined to one another by 49.51 (10)°. In the crystal, neighbouring mol-ecules are linked via C-H⋯O hydrogen bonds, forming chains propagating ...
متن کامل(2R,4R)-1-(tert-Butoxycarbonyl)-4-methoxypyrrolidine-2-carboxylic acid
In the title compound, C(11)H(19)NO(5), the five-membered pyrrolidine ring adopts an envelope conformation. The dihedral angles between the carboxyl group plane, the pyrrolidine ring and the meth-oxy group are 59.50 (3) and 62.02 (1)°, respectively. In the crystal, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into chains along [100]. The absolute configuration is assigned in accord ...
متن کامل(2R)-Ethyl 2-(5-bromo-2,3-dioxoindolin-1-yl)propanoate
The title compound, C(13)H(12)BrNO(4), was obtained from an optically active aniline derivative. The structure was characterized by (1)H NMR, (13)C NMR, MS and X-ray diffraction techniques. 86% of the atoms of the two independent mol-ecules in the asymmetric unit show non-crystallographic inversion symmetry.
متن کامل(2R,3S,4R)-3,4-Isopropylidenedioxy-2-(phenylsulfonylmethyl)pyrrolidin-1-ol
The title compound, C(14)H(19)NO(5)S, was prepared by nucleophilic addition of the lithium derivative of methyl-phenyl-sulfone to (3S,4R)-3,4-isopropyl-idene-dioxy-pyrroline 1-oxide. There are four mol-ecules in the asymmetric unit. The crystal structure determination confirms the configuration of the chiral centres as 2R,3S,4R. In the crystal, pairs of O-H⋯N hydrogen bonds link the mol-ecules ...
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ژورنال
عنوان ژورنال: Trudy Instituta Matematiki i Mekhaniki UrO RAN
سال: 2016
ISSN: 0134-4889
DOI: 10.21538/0134-4889-2016-22-2-28-37