title: Di-n-propyl 4,4'-dihy-droxy-3,3'-{[(3aRS,7aRS)-2,3,3a,4,5,6,7,7a-octa-hydro-1H-benzimidazole-1,3-di-yl]bis-(methyl-ene)}dibenzoate.
abstract: The title compound, C(29)H(38)N(2)O(6), was prepared as model for studying intra-molecular hydrogen-bonding inter-actions. Mol-ecules of the title compound are located on a crystallographic twofold rotation axis, which passes through the C atom linked to the two N atoms on the imidazolidine ring. The mol-ecular structure shows the existence of two intra-molecular O-H⋯N hydrogen-bonding inter-actions between the two N atoms of the imidazolidine moiety and the hy-droxy groups in the aromatic rings. The crystal structure shows the strain of ring fusion in the perhydro-benzimidazole moiety according to the endocyclic bond angles and the torsion angles, which evidence a puckering of the cyclo-hexane ring with respect to normal tetra-hedral bond angles in an ideal chair conformation.
authors: Augusto
authors: A
authors: Rivera
authors: Diego
authors: D
authors: Quiroga
authors: Jaime
authors: J
authors: Ríos-Motta
authors: Karla
authors: K
authors: Fejfarová
authors: Michal
authors: M
authors: Dušek