Intramolecular Interactions In Dimethyl 2,2'-Bipyridine-3,3'-Dicarboxylate

The title compound crystallizes from acetone with the pyridine rings arranged at 53 degrees to each other in a trans conformation. There are intramolecular interactions between the alkoxy O atoms of the ester groups and the C2 atoms of the opposite rings, similar to those observed in the 3,3'-dinitro analogue. There are no significant intramolecular interactions between ring N atoms and ester carbonyl C atoms, although similar 1,5 interactions have been observed in other cases