TY  - JOUR
A1  - Brito, Iván
A1  - Vallejos, Javier
A1  - Cárdenas, Alejandro
A1  - López-Rodríguez, Matías
A1  - Bolte, Michael
T1  - A monoclinic modification of propane-1,3-diyl bis(pyridine-3-carboxylate)
T2  - Acta crystallographica / Section E, Structure reports online
N2  - In the title compound, C15H14N2O4, (I), the mol­ecule lies on a twofold rotation axis which passes through the central C atom of the aliphatic chain, giving one half-mol­ecule per asymmetric unit. The structure is a monoclinic polymorph of the triclinic structure previously reported [Brito, Vallejos, Bolte & López-Rodríguez (2010). Acta Cryst. E66, o792], (II). The most obvious difference between them is the O/C/C/C—O/C/C/C torsion angle [58.2 (7)° in (I) and 173.4 (3)/70.2 (3)° in (II) for GG and TG conformations, respectively]. Another important difference is observed in the dihedral angle between the planes of the aromatic rings [86.49 (7)° for (I) and 76.4 (3)° for (II)]. The crystal structure features a weak pi–pi inter­action [centroid–centroid distance = 4.1397 (10)Å]; this latter kind of inter­action is not evident in the triclinic polymorph.
Y1  - 2011
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/21881
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-108302
SN  - 1600-5368
N1  - This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
VL  - 67
IS  - o278
ER  -