Biphenyl-4,4'-diyl bis-(2,2,5,5-tetra-methyl-1-oxyl-3-pyrroline-3-carboxyl-ate).

ABSTRACT: In the title compound, C(30)H(34)N(2)O(6), the complete molecule is generated by a crystallographic 2/m symmetry operation. The 1-oxyl-3-pyrroline-3-carboxyl-ate group lies on a mirror plane. The dihedral angle between the ring planes of the biphenyl fragment is constrained by symmetry to be zero, resulting in rather short intramolecular H?H contact distances of 2.02?Å. In the crystal, molecules are connected along the a-axis direction by very weak intermolecular methyl-phenyl C-H?? interactions. The C-H bond is not directed to the center of the benzene ring, but mainly to one C atom [C-H?C(x?-?1, y, z): H?C = 2.91?Å and C-H?C = 143°].

SUBMITTER: Margraf D 

PROVIDER: S-EPMC2977196 | biostudies-literature | 2009 Jul

REPOSITORIES: biostudies-literature