Organometallic compounds with metal-metal bonds. XIV. Reactions of cyclopentadienyldicarbonylcobalt with halides and organometallic halides of germanium(IV) and tin(IV)
Organometallic compounds with metal-metal bonds. XIV. Reactions of cyclopentadienyldicarbonylcobalt with halides and organometallic halides of germanium(IV) and tin(IV)
作者:Rudolf Kummer、William A. G. Graham
DOI:10.1021/ic50061a027
日期:1968.3
New organogermanium cations [RGe(OCH2CH2NME2)2]+ with intramolecular N→Ge coordination bonds
作者:I. A. Portnyagin、V. V. Lunin、M. S. Nechaev
DOI:10.1007/s11172-007-0141-x
日期:2007.5
New organohalogermanes RGe(OCH2CH2NMe2)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.