2,6-Bis(benzimidazol-2-yl)pyridine complexes of group 14 elements
Treatment of MCl2 (M = Ge or Sn) with 2,6-bis(benzimidazol-2-yl)pyridine (G-BZIMPY, G = NBn, N(3,5-CF3)Bn, NAllyl and O) yielded the self-ionization products [G-BZIMPYMCl][MCl3] (1-6) in high yields (75-98%). Reduction reactions are examined and the nickel complexes 8 and 9 ([(NBn-BZIMPY)2Ni][MCl3]2) are isolated from the reaction of Ni(COD)2 with 1 and 2 respectively. [NBn-BZIMPYSnCl][SnCl3] shows a significantly stronger MLCT band in the UV-vis absorption spectrum than its germanium counterparts, with germanium complexes exhibiting negative solvatochromism that is not observed in tin complexes.
Swidan, A. (Ala'aeddeen), St Onge, P.B.J. (P.Blake J.), Binder, J.F. (Justin F.), Suter, R. (Riccardo), Burford, N. (Neil), & Macdonald, C.L.B. (2019). 2,6-Bis(benzimidazol-2-yl)pyridine complexes of group 14 elements. Dalton Transactions, 48(22), 7835–7843. doi:10.1039/c9dt00995g