Liantonio, R, Logothetis, Thomas A., Messina, M T, Metrangolo, P, De Santis, A, Pilati, T and Resnati, G (2002) 2,2':6',2''-terpyridine as monodentate ligand: halogen bonding driven formation of discrete 2 : 1 aggregates with 1,2,4,5-tetrafluoro-3,6-diiodobenzene. Collection of Czechoslovak Chemical Communications, 67 (9), 1373-1382. (doi:10.1135/cccc20021373).
Abstract
2,2':6',2''-Terpyridine (1) is a well-known electron donor module in metal coordination chemistry and typically works as a tridentate ligand. Here it is shown that 1 can also work as electron donor towards iodoperfluorocarbons both in solution and in the solid phase. Halogen-bonded supramolecular systems are thus obtained. Specifically, terpyridine 1 self-assembles with 1,2,4,5-tetrafluoro-3,6-diiodobenzene (2) and affords the trimeric adduct 3, which is stable and crystalline in the air at room temperature. Single crystal X-ray analysis shows how in adduct 3 both iodine atoms of one molecule of 2 are halogen-bonded to the nitrogen atoms of external pyridine rings of two molecules of 1 that act as monodentate electron donors.
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