By the transmetallation of ppyHgCl [ppy = 2-(2'-pyridyl)phenyl] (1) with SnCl4 and SbCl3, the synthesis of the monoorgano main group halides, [ppySnCl3(H2O)]·2(0.5diox) (diox = 1,4-dioxane) [2(H2O)]·2(0.5diox) and [ppySbCl2] (3) was achieved. The reaction of 1 with BiCl3 does not give the analogous monoorganobismuth dichloride. Instead, it results in the formation of [(ppy)2Bi]+·[ppyBiCl3]– (4). Reactions of (ppy)2Te and (ppyTe)2 with SO2Cl2 and Br2 result in the formation of ppyTeCl (5) and ppyTeBr (6) respectively. All the synthesized compounds were characterized by multi-nuclear NMR spectroscopy (1H, 13C, 119Sn, and 125Te), FT-IR spectroscopy, ESI-MS, CHN analysis, and single-crystal X-ray diffraction studies. The molecular structures of 2–6 reveal strong intramolecular coordination of the N-atoms of the pendant arms with the main group element centers. DFT calculations; including Natural Bond Order (NBO), Electron Localization Function (ELF), Electrostatic Surface Potential (ESP) and Atoms in Molecules (AIM) infer that the stability of 2–6 relies on the σ-hole participation of the element center with the N-lone pair of the pyridyl arm.
- Density functional calculations
- Intramolecular interactions
- Main group elements
- Structure elucidation