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New Derivatives of Quinoxaline – Syntheses, Complex Formation and their Application as Controlling Ligands for Zinc Catalyzed Epoxide-CO2–Copolymerization

  • O. Hampel , C. Rode , D. Walther , R. Beckert EMAIL logo and H. Görls
Published/Copyright: June 2, 2014
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Zeitschrift für Naturforschung B
From the journal Zeitschrift für Naturforschung B Volume 57 Issue 8

A series of amino-(type 3) as well as hydrazino-substituted quinoxalines (type 8) have been synthesized in order to study their ability to complex with iron(III) and zinc(II) ions. Cyclization of 2,3-dichloroquinoxaline (1) with a bis-amidine 9 leads to ring-fused quinoxalines of type 10. One of these compounds (10a) forms a unique macrocyclic hexameric complex 14 with zinc ions in the presence of 2,6-diisopropyl phenolate. In an analogous manner, the monomeric complexes 12 and 13 could be synthesized. All of these new zinc complexes catalyze the copolymerization of cyclohexene oxide and carbon dioxide with a high degree of selectivity in the resulting polymers.

Keywords: Copolymerization Epoxide-CO2; Quinoxalines; Zinc Complexes
Received: 2002-3-26
Published Online: 2014-6-2
Published in Print: 2002-8-1

© 1946 – 2014: Verlag der Zeitschrift für Naturforschung

Articles in the same Issue

  1. Wechselwirkungen in Molekülkristallen, 180 [1, 2]. σ-Donator/Akzeptor-Komplexe {S(CI)4···X⊖ }(X⊖ = I⊖ , SCN⊖ ) von Tetraiodthiophen in Tetra(n-butyl)ammoniumhalogenid-Salzen/Interaction in Molecular Crystals, 180 [1, 2]. -Donor/Acceptor Complexes {S(CI)4···X⊖} (X⊖= I⊖, SCN⊖ of Tetraiodothiophene in Tetra(n-butyl)ammonium Halide Salts
  2. Wechselwirkungen in Molekülkristallen, 181 [1, 2]. σ-Donator/Akzeptor-Komplexe {MAI4···X⊖ } (X⊖ = Br⊖ , I⊖ , SCN⊖ ) der Tetraiod-Akzeptormoleküle MAI4 (MA = Ethen, Thiophen, N-Methylpyrrol) in Tetraphenylphosphoniumhalogenid-Salzen Interaction in Molecular Crystals, 181 [1, 2]. σ-Donor/Acceptor Complexes {MAI4···X⊖ }(X⊖ = Br⊖, I⊖, SCN⊖ of Tetraiodo Acceptor Molecules MAI4 (MA = Ethene, Thiophene, N-Methylpyrrole) in Tetraphenylphosphonium Halide Salts
  3. Synthesis of SrxBa(1-x)TiO3 Solid Solutions from the Mechanically Activated System BaCO3 - SrCO3 - TiO2
  4. Synthesis and Structure of the First Transition Metal Complex with Methanesulfonylhydrazine as a Ligand
  5. Thermochemische Untersuchungen zu den Systemen SE2O3-SeO2. V. Ytterbiumselenoxide auf dem Schnitt Yb2O3-SeO2/Thermochemical Investigations of Systems RE2O3-SeO2. V. Ytterbium Selenium Oxides on the Line Yb2O3-SeO2
  6. Implications of the Results of a Routine Structure Determination: Tris(triphenylphosphine)gold(I) Chloride Bis(dichloromethane)
  7. Structural, Spectroscopic and Theoretical Studies of (tButyl-isocyanide)gold(I) Iodide
  8. Preparation and Crystal Structure of Bis(isocyanide)gold(I) Bis(phenylene-1,2-dithiolato)aurates(III)
  9. X-Ray and Raman Investigations on Cyanides ofMono- and DivalentMetals and Synthesis, Crystal Structure and Raman Spectrum of Tl5(CO3)2(CN)
  10. A New Mixed Valent Europium Chloride: Na5Eu7Cl22
  11. Structure of N-Methylisatin N(4)-Dimethylthiosemicarbazone and its Electrochemically Synthesized 6-Coordinate Cadmium(II) Complex
  12. Crystal Structures of Seven Terephthaldiamide Derivatives
  13. [4 + 2]-Cycloaddition Reactions Involving α-Oxo Thioketone Intermediates
  14. Der (2-Phenyl-2-trimethylsilyl)ethyl-(PTMSE)-Ester – eine neutral spaltbare Carboxyschutzgruppe/The (2-Phenyl-2-trimethylsiylyl)ethyl (PTMSE) Ester – a Carboxy Protecting Group Cleavable under Neutral Conditions
  15. Synthesis and Structure of Bis-Urea Phenazines
  16. New Derivatives of Quinoxaline – Syntheses, Complex Formation and their Application as Controlling Ligands for Zinc Catalyzed Epoxide-CO2–Copolymerization
  17. Steroids and Terpenoids from Ajuga relicta
  18. Notizen: Montmorillonite K-10 as Highly Efficient and Mild Catalyst for Deprotection of Ketone Dimethylhydrazones Using Microwaves in a Solventless System
https://doi.org/10.1515/znb-2002-0816
Keywords for this article
Copolymerization Epoxide-CO2; Quinoxalines; Zinc Complexes

Articles in the same Issue

  1. Wechselwirkungen in Molekülkristallen, 180 [1, 2]. σ-Donator/Akzeptor-Komplexe {S(CI)4···X⊖ }(X⊖ = I⊖ , SCN⊖ ) von Tetraiodthiophen in Tetra(n-butyl)ammoniumhalogenid-Salzen/Interaction in Molecular Crystals, 180 [1, 2]. -Donor/Acceptor Complexes {S(CI)4···X⊖} (X⊖= I⊖, SCN⊖ of Tetraiodothiophene in Tetra(n-butyl)ammonium Halide Salts
  2. Wechselwirkungen in Molekülkristallen, 181 [1, 2]. σ-Donator/Akzeptor-Komplexe {MAI4···X⊖ } (X⊖ = Br⊖ , I⊖ , SCN⊖ ) der Tetraiod-Akzeptormoleküle MAI4 (MA = Ethen, Thiophen, N-Methylpyrrol) in Tetraphenylphosphoniumhalogenid-Salzen Interaction in Molecular Crystals, 181 [1, 2]. σ-Donor/Acceptor Complexes {MAI4···X⊖ }(X⊖ = Br⊖, I⊖, SCN⊖ of Tetraiodo Acceptor Molecules MAI4 (MA = Ethene, Thiophene, N-Methylpyrrole) in Tetraphenylphosphonium Halide Salts
  3. Synthesis of SrxBa(1-x)TiO3 Solid Solutions from the Mechanically Activated System BaCO3 - SrCO3 - TiO2
  4. Synthesis and Structure of the First Transition Metal Complex with Methanesulfonylhydrazine as a Ligand
  5. Thermochemische Untersuchungen zu den Systemen SE2O3-SeO2. V. Ytterbiumselenoxide auf dem Schnitt Yb2O3-SeO2/Thermochemical Investigations of Systems RE2O3-SeO2. V. Ytterbium Selenium Oxides on the Line Yb2O3-SeO2
  6. Implications of the Results of a Routine Structure Determination: Tris(triphenylphosphine)gold(I) Chloride Bis(dichloromethane)
  7. Structural, Spectroscopic and Theoretical Studies of (tButyl-isocyanide)gold(I) Iodide
  8. Preparation and Crystal Structure of Bis(isocyanide)gold(I) Bis(phenylene-1,2-dithiolato)aurates(III)
  9. X-Ray and Raman Investigations on Cyanides ofMono- and DivalentMetals and Synthesis, Crystal Structure and Raman Spectrum of Tl5(CO3)2(CN)
  10. A New Mixed Valent Europium Chloride: Na5Eu7Cl22
  11. Structure of N-Methylisatin N(4)-Dimethylthiosemicarbazone and its Electrochemically Synthesized 6-Coordinate Cadmium(II) Complex
  12. Crystal Structures of Seven Terephthaldiamide Derivatives
  13. [4 + 2]-Cycloaddition Reactions Involving α-Oxo Thioketone Intermediates
  14. Der (2-Phenyl-2-trimethylsilyl)ethyl-(PTMSE)-Ester – eine neutral spaltbare Carboxyschutzgruppe/The (2-Phenyl-2-trimethylsiylyl)ethyl (PTMSE) Ester – a Carboxy Protecting Group Cleavable under Neutral Conditions
  15. Synthesis and Structure of Bis-Urea Phenazines
  16. New Derivatives of Quinoxaline – Syntheses, Complex Formation and their Application as Controlling Ligands for Zinc Catalyzed Epoxide-CO2–Copolymerization
  17. Steroids and Terpenoids from Ajuga relicta
  18. Notizen: Montmorillonite K-10 as Highly Efficient and Mild Catalyst for Deprotection of Ketone Dimethylhydrazones Using Microwaves in a Solventless System
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