TY  - JOUR
A1  - Emmerling, Franziska
A1  - Orgzall, Ingo
A1  - Reck, Günter
A1  - Schulz, Burkhard W.
A1  - Stockhause, Sabine
A1  - Schulz, Burkhard
T1  - Structures of substituted di-aryl-1, 3,4-oxadiazole derivatives: 2,5-bis(pyridyl)- and 2,5-bis(aminophenyl)-substitution
JF  - Journal of molecular structure
N2  - Crystal structures of four different di-aryl-1,3,4-oxadiazole compounds (aryl = 2-pyridyl-, 3-pyridyl-, 2-aminophenyl-, 3-aminophenyl-) are determined. Crystallization of di(2-pyridyl)-1,3,4-oxadiazole yielded monoclinic and triclinic polymorphs. The structures are characterized by the occurrence of pi-pi interactions. Additionally, in case of the aminophenyl compounds intra- as well as intermolecular hydrogen bonds are found that influence the packing motif as well. Since these molecules are often used as ligands in metal-organic complexes similarities and differences of the molecular conformation between the molecules in the pure crystals and that of the ligands in the complexes are discussed. (c) 2006 Elsevier B.V. All rights reserved.
KW  - crystal structure
KW  - 1,3,4-oxadiazole
KW  - molecular conformation
KW  - hydrogen bonds
Y1  - 2006
U6  - https://doi.org/10.1016/j.molstruc.2006.03.076
SN  - 0022-2860
VL  - 800
IS  - 1-3
SP  - 74
EP  - 84
PB  - Elsevier
CY  - Amsterdam
ER  -