RESUMEN
In the crystal structure of the title compound, C26H36N2O4, the tripodal mol-ecule exists in a conformation in which the substituents attached to the central arene ring are arranged in an alternating order above and below the ring plane. The heterocyclic unit is inclined at an angle of 79.6â (1)° with respect to the plane of the benzene ring. In the crystal, the mol-ecules are connected via N-Hâ¯O bonds, forming infinite supra-molecular strands. Inter-strand association involves weak C-Hâ¯O and C-Hâ¯π inter-actions, with the pyridine ring acting as an acceptor in the latter case.
RESUMEN
In the crystal structures of the formamide monosolvate (1a) and the n-propanol/H2O solvate/hydrate (1b) of the title compound, C38H50N4O3 (1), the tripodal host mol-ecule adopts a conformation in which the substituents attached to the central benzene ring are arranged in an alternating order above and below the ring plane. As a result of the different nature of the involved guest species, the crystal components in 1a create a three-dimensional supra-molecular architecture, while the crystal structure of 1b consists of two-dimensional supra-molecular aggregates extending parallel to the crystallographic ab plane.
RESUMEN
In the crystal structure of the title compound, C30H50N4O4, the two bis-(hy-droxy-eth-yl)amino moieties and the 2,4-di-methyl-pyridinyl-amino unit of the mol-ecule are located on one side of the central benzene ring, while the ethyl substituents are oriented in the opposite direction. The dihedral angle between the planes of the aromatic rings is 73.6â (1)°. The conformation of the mol-ecule is stabilized by intra-molecular O-Hâ¯O (1.86-2.12â Å) and C-Hâ¯N (2.40, 2.54â Å) hydrogen bonds. Dimers of inversion-related mol-ecules represent the basic supra-molecular entities of the crystal structure. They are further connected via O-Hâ¯O hydrogen bonding into undulating layers extending parallel to the crystallographic bc plane. Inter-layer inter-action is accomplished by weak C-Hâ¯π contacts.
RESUMEN
The title compounds, C23H25Br2NO2 (1) and C31H29BrN2O4 (2), crystallize in the space group P21/n with two (1-A and 1-B) and one mol-ecules, respectively, in the asymmetric unit of the cell. The mol-ecular conformation of these compounds is stabilized by intra-molecular C-Hâ¯O hydrogen bonds and C-Hâ¯N or C-Hâ¯π inter-actions. The crystal structure of 1 features a relatively strong Brâ¯O=C halogen bond, which is not observed in the case of 2. Both crystal structures are characterized by the presence of C-Hâ¯Br hydrogen bonds and numerous inter-molecular C-Hâ¯O hydrogen-bonding inter-actions.
RESUMEN
In the title monohydrate compound, 1a, and the methanol solvate compound, 1b, the tri-ethyl-benzene derivative, C35H51N5O, has three functionalized side arms and three ethyl groups, the former being located on one side of the central benzene ring, while the latter are directed to the opposite side. Both the crystals are constructed of structurally similar dimers of 1:1 host-guest complexes held together by N-Hâ¯O and O-Hâ¯N hydrogen bonds, and in 1a additionally by O-Hâ¯O hydrogen bonds. The structure of 1b contains additional highly disordered solvent mol-ecules. Thus, the SQUEEZE routine [Spek (2015 â¸). Acta Cryst. C71, 9-18] in PLATON was used to generate a modified data set, in which the contribution of the disordered mol-ecules to the structure amplitudes is eliminated. These solvent mol-ecules are not considered in the reported chemical formula.