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Dibenzo-18-crown-6-picric acid-water (1/2/3).

ABSTRACT: In the crown ether ring of the title compound, C(20)H(24)O(6)·2C(6)H(3)N(3)O(7)·3H(2)O, the O-C(H(2))-C(H(2))-O torsion angles indicate a gauche conformation of the ethyl-eneoxy units, while the C-O-C-C torsion angles indicate planarity of these segments; the dihedral angle between the two benzene rings is 44.53?(13)°. In both picric acid mol-ecules, one of the nitro groups is twisted away from the attached ring. The mol-ecules are linked into chains along the b axis via inter-molecular O-H?O hydrogen bonds. In addition, the crystal structure is stabilized by C-H?O hydrogen bonds and ?-? inter-actions [centroid-centroid distance between benzene rings = 3.5697?(16)?Å].

SUBMITTER: Saleh MI

PROVIDER: S-EPMC2961663 | biostudies-literature | 2008 Jun

REPOSITORIES: biostudies-literature

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Dibenzo-18-crown-6-picric acid-water (1/2/3).

Saleh Muhammad Idiris MI Kusrini Eny E Rosli Mohd Mustaqim MM Fun Hoong-Kun HK

Acta crystallographica. Section E, Structure reports online 20080621 Pt 7

In the crown ether ring of the title compound, C(20)H(24)O(6)·2C(6)H(3)N(3)O(7)·3H(2)O, the O-C(H(2))-C(H(2))-O torsion angles indicate a gauche conformation of the ethyl-eneoxy units, while the C-O-C-C torsion angles indicate planarity of these segments; the dihedral angle between the two benzene rings is 44.53 (13)°. In both picric acid mol-ecules, one of the nitro groups is twisted away from the attached ring. The mol-ecules are linked into chains along the b axis via inter-molecular O-H⋯O hy ...[more]

PMID: 21202944

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Dibenzo-18-crown-6.

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A dimer of bis-(N-heterocyclic carbene)rhodium(I) centres spanned by a dibenzo-18-crown-6 bridge from synchrotron radiation.

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