4,4′-Dimethyl-2,2′-[1,2-phenylenebis(nitrilomethylidyne)]diphenol
نویسندگان
چکیده
In the title Schiff base, C(22)H(20)N(2)O(2), the benzene ring forms dihedral angles of 53.92 (1) and 3.62 (1)° with the two salicylaldimine groups. There are two strong O-H⋯N intra-molecular hydrogen bonds. The crystal packing is stabilized by weak inter-molecular C-H⋯O hydrogen bonds and π-π stacking inter-actions (average distance 3.39 Å).
منابع مشابه
6,6′-Di-tert-butyl-4,4′-dimethyl-2,2′-[1,2-phenylenebis(nitrilomethanylylidene)]diphenol
In the title mol-ecule, C(30)H(36)N(2)O(2), the dihedral angles between the central benzene ring and the two benzene rings of the butyl-salicylaldimine groups are 14.3 (2) and 40.6 (2)°. There are two strong intra-molecular O-H⋯N hydrogen bonds which form S(6) rings. The crystal studied was a non-merohedral twin with refined components of 0.270 (4) and 0.730 (4).
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In the crystal structure of the title compound, C(24)H(24)N(2)O(4), the dihedral angles between the central and the two outer benzene rings are 48.12 (8) and 21.44 (8)°. Intra-molecular O-H⋯N hydrogen bonding generates S(6) rings.
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The Schiff base ligand derived from the condensation of 3,5-dibromo-salicylaldehyde and 1,2-phenyl-enediamine, in the presence of dimethyl-formamide, forms the centrosymmetric title neutral binuclear distorted complex, [Cd(2)(C(20)H(10)Br(4)N(2)O(2))(2)(C(3)H(7)NO)(2)], with the two octa-hedral Cd atoms linked by two O atoms. All bond lengths and angles show normal values.
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The mol-ecule of the title compound, C(20)H(20)Br(2)N(2)O(2), lies on a twofold axis. It contains two stereogenic C atoms with R chirality and thus it is the enatiomerically pure R,R-diastereomer. There is an intra-molecular O-H⋯N hydrogen bond.
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In the title mol-ecule, C(20)H(22)N(2)O(2)Se(4), the dihedral angle between the pendant aromatic rings is 67.1 (2)°. The conformation is stabilized by two intra-molecular O-H⋯N hydrogen bonds.
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