Theobrominium perchlorate dibenzo-18-crown-6 3.25-hydrate.

ABSTRACT: The co-crystal, C7H9N4O2 (+)·ClO4 (-)·C20H24O6·3.25H2O, consists of theobrominium (3,7-di-methyl-2,6-dioxo-1H-purin-9-ium) cations, perchlorate anions and dibenzo-18-crown-6 and water mol-ecules. The crown ether is in a bent conformation, in which the planes of the aromatic rings subtend an angle of 63.7?(1)°. Inter-molecular O-H?O hydrogen bonding between the water mol-ecules and the O atoms of the cyclic ether delimit an empty space reminiscent of a hollow cage. The water mol-ecules are additionally linked to the cations by N-H?O hydrogen bonding. One of the positions of the water molecules is occupied only fractionally (25%) and is located outside this framework.

SUBMITTER: Kulikov V 

PROVIDER: S-EPMC3772464 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature