On pyridine chloronium cations

Abstract

We present the first structural evidence of mono- and bis(pyridine) chloronium cations. The latter was synthesized from a mixture of pyridine, elemental chlorine and sodium tetrafluoroborate in propionitrile at low...

Trendbericht Festkörperchemie und Materialforschung 2024

“…47) Den ersten strukturellen Nachweis von Mono-und Bis(pyridin)chloronium-Ionen im festen Zustand haben Riedel und Mitarbeitende gebracht. 48) 50) Röhr und ihre Gruppe haben die metallische Clusterverbindung K 8 GaTl 10 gefunden. 51) Abb.…”

A focus on coordination chemistry at chlorine

“…14 Which brings us to the remarkable recent results from Riedel and co-workers who were able to crystallographically characterize both mono and bis-pyridine adducts of chloronium cations [Cl] + as well as a pyridine-Cl-Cl charge transfer complex for the rst time. 15 For the syntheses, the problem of obtaining stoichiometric amounts of Cl 2 gas was solved by rst condensing and weighing Cl 2 into pressure tubes. This was then condensed onto the appropriate amount of pyridine or lutidine in propionitrile at −196 °C.…”

“…Which brings us to the remarkable recent results from Riedel and co-workers who were able to crystallographically characterize both mono and bis-pyridine adducts of chloronium cations [Cl] + as well as a pyridine–Cl–Cl charge transfer complex for the first time. 15 …”

Halogen Bonds of Halogen(I) Ions─Where Are We and Where to Go?

“… a The 15 N NMR coordination shift represents the chemical shift change upon complex formation, δ­( 15 N) coord = δ­( 15 N) complex – δ­( 15 N) ligand . b Measured in CDCN 3 at −35 °C; all other chemical shifts given here were measured in CD 2 Cl 2 . The fluorine­(I) complex is asymmetric, and accordingly, its nitrogens have different chemical shifts. c Due to the instability of this complex, , its 15 N NMR chemical shift data is unavailable. …”