New organogermanium cations [RGe(OCH2CH2NME2)(2)](+) with intramolecular N -> Ge coordination bondsстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:New organohalogermanes RGe(OCH2CH2NMe2)(2)X (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 H-1 and C-13 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.