41856-42-2Relevant articles and documents
New organogermanium cations [RGe(OCH2CH2NME 2)2]+ with intramolecular N→Ge coordination bonds
Portnyagin,Lunin,Nechaev
, p. 926 - 934 (2007)
New organohalogermanes RGe(OCH2CH2NMe 2)2X (R = Ph, X = I (5); R = Me, X = Cl (6) or I (7)) with an intramolecular N→Ge coordination bond were synthesized. According to the 1H and 13C NMR spectroscopic data, iodides 5 and 7 exist in solution as ionic compounds with the pentacoordinated germanium atom. In solution of compound 4 (R = Ph, X = Cl), there is an equilibrium between the ionic and covalent forms. The equilibrium shifts toward the ionic form with increasing solvent polarity or temperature. In solution, chloride 6 is a covalent compound. The structures and relative stabilities of different isomers of compounds 4-7 were studied by quantum chemical calculations at the density functional level of theory.