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Russian Chemical Bulletin

, Volume 61, Issue 3, pp 642–651 | Cite as

Trichloro- and methyldichlorogermyl monochelates and dibromo- and dichlorogermyl bischelates derived from N,N-disubstituted amides of 2-hydroxycarboxylic acids

  • D. V. Airapetyan
  • T. P. Murasheva
  • S. Yu. Bylikin
  • A. A. Korlyukov
  • A. G. Shipov
  • S. V. Gruener
  • E. P. Kramarova
  • Vad. V. Negrebetskii
  • S. A. Pogozhikh
  • G. Ya. Zueva
  • M. Yu. Antipin
  • Yu. I. Baukov
Full Article

Abstract

The reactions of GeCl4, GeBr4, and MeGeCl3 with O-trimethylsilyl derivatives of N,N-disubstituted amides of 2-hydroxycarboxylic acids afforded pentacoordinate and hexacoordinate neutral (O,O)-mono- and (O,O)-bischelates. The reactions of glycolic acid derivatives with GeX4 produced bischelates X2Ge[OCH2C(O)NR2R3]2 7a,c,d (X = Cl, R2 = R3 = Me (a), (CH2)5 (c), (CH2CH2)2O (d)) and 8a (X = Br). By contrast, the reactions of lactic and mandelic acid derivatives with GeCl4 and MeGeCl3 gave monochelates Cl3Ge[OCH(R1)C(O)NR2R3] (S)-9a–c (R1 = Me) and Cl2MeGe[OCH(R1)C(O)NR2R3] 10a (R1 = H), (S)-11a,b (R1 = Me), and (S)-12a (R1 = Ph) (R2R3 = (CH2)4 (b)), respectively. According to the X-ray diffraction data, the Ge atom in bischelates 7c,d and 8a has a coordination number 6, and its coordination polyhedron can be described as a slightly distorted octahedron. In monochelates (S)-9a-c, 10a, (S)-11a,b, and (S)-12a, the Ge atom has a coordination number 5, and its coordination polyhedron can be described as a trigonal bipyramid with two halogen atoms or one halogen atom and one ethereal oxygen atom in equatorial positions and the halogen atom and the amide oxygen atom in the axial positions. The bonds in the axial positions are somewhat longer than the corresponding bonds in tetracoordinate Ge compounds.

Key words

penta- and hexacoordinate germanium compounds synthesis X-ray diffraction study 

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • D. V. Airapetyan
    • 1
  • T. P. Murasheva
    • 1
  • S. Yu. Bylikin
    • 1
  • A. A. Korlyukov
    • 2
  • A. G. Shipov
    • 1
  • S. V. Gruener
    • 3
  • E. P. Kramarova
    • 1
  • Vad. V. Negrebetskii
    • 1
  • S. A. Pogozhikh
    • 2
  • G. Ya. Zueva
    • 4
  • M. Yu. Antipin
    • 2
  • Yu. I. Baukov
    • 1
  1. 1.N. I. Pirogov Russian National Research Medical UniversityMoscowRussian Federation
  2. 2.A. N. Nesmeyanov Institute of Organoelement CompoundsRussian Academy of SciencesMoscowRussian Federation
  3. 3.Department of ChemistryM. V. Lomonosov Moscow State UniversityMoscowRussian Federation
  4. 4.A. M. Prokhorov General Physics InstituteRussian Academy of SciencesMoscowRussian Federation

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