Iodine(I) and Silver(I) Complexes of Benzoimidazole and Pyridylcarbazole Derivatives
Rissanen, K., Taipale, E., Truong, K.-N., & Siepmann, M. (2021). Iodine(I) and Silver(I) Complexes of Benzoimidazole and Pyridylcarbazole Derivatives. Chemistry : A European Journal, 27(69), 17412-17419. https://doi.org/10.1002/chem.202103152
Published inChemistry : A European Journal
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The synthesis of iodine(I) complexes with either benzoimidazole or carbazole-derived sp 2 N -containing Lewis bases is described, as well as their corresponding silver(I) complexes. The addition of elemental iodine to the linear two-coordinate Ag(I) complexes produces iodine(I) complexes with a three-center four-electron (3c-4e) [N — I — N] + bond. The 1 H and 1 H- 15 N HMBC NMR studies unambiguously confirm the formation of the complexes in all cases via the [N — Ag — N] + → [N — I — N] + cation exchange, with the 15 N NMR chemical shift change between 94 to 111 ppm when compared to the free ligand. The single crystal X-ray crystallographic studies on four I + complexes revealed highly symmetrical [N — I — N] + bonds with I — N bond distances of 2.21 - 2.26 Å and N — I — N angles of 177 - 180 ° , whilst some of the corresponding Ag + complexes showed a clear deviation from linearity with N — Ag — N angles of ca. 150 ° and Ag — N bond distances of 2.09 - 2.18 Å.
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Related funder(s)Academy of Finland
Funding program(s)Academy Project, AoF
Additional information about fundingThe authors gratefully acknowledge the Academy of Finland (K.R. grant no. 317259) and the University of Jyvaskyla, Finland for financial support.
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