New stable germylenes, stannylenes, and related compounds. 5. Germanium(II) and tin(II) azides [N3-E14-OCH2CH2NMe2]2 (E14 = Ge, Sn): synthesis and structure

New stable azido derivatives of divalent germanium and tin [N3-E14-OCH2CH2NMe2]2 (E14 = Ge (1), Sn (2)) have been synthesized by use of the β-dimethylaminoethoxy ligand that forms the intramolecular E14 ← N coordination bond. Their crystal structures have been determined by X-ray diffraction analysis. Compounds 1 and 2 are centrosymmetric dimers via two intermolecular dative E14 ← O interactions with essentially linear monodentate azide ligands. The dominant canonical form of the E14-azide moieties is E14–N–Ntriple bond; length of mdashN.