Halogen bonds and π–π interactions in the crystal structure of 1,3,5-trifluoro-2,4,6-triiodobenzene–N,N-dimethylformamide (1/1), C₉H₇F₃I₃NO

Abstract

C 9 H 7 F 3 I 3 NO, monoclinic, P2 1 /n (no. 14), a = 7.5581 (4) CCDC no.: 1574340The crystal structure is shown in the figure. Tables 1 and 2 contain details on crystal structure and measurement conditions and a list of the atoms including atomic coordinates and displacement parameters.

Halogen bonds in the crystal structure of 1,4-diiodotetrafluorobenzene–1,2-bis(4-pyridyl)propane (1/1), C19H14F4I2N2

“…At the same time, the competitions between different noncovalent interactions also exist during the formation of the crystals. The most common competition in the crystal engineering involving halogen bond occurs between the halogen bond and the π• • • π stacking interaction [12][13][14][15][16]. In a previous paper, we investigated the structural competition between the C-I• • • O halogen bond and the π-π stacking interaction [13] It is significant to compare the crystal structure of the cocrystal formed between 1,4-diiodotetrafluorobenzene and 1,2-bis(4-pyridyl)propane with the crystal structure of the cocrystal formed between 1,4-diiodotetrafluorobenzene and 4,4′-bipyridine and the crystal structure of the cocrystal formed between 1,4-diiodotetrafluorobenzene and 1,2bis(4-pyridyl)ethane [11,12].…”