Skip to main content
SpringerLink
Log in

Thermal decomposition of the solvent-extracted chloro complexes of vanadium(IV) with trioctylamine and trioctylmethylammonium chloride

  • Published:
Journal of thermal analysis Aims and scope Submit manuscript

Abstract

The complexes (R3NHVO(OH)Cl2)2 and (R3R′NVO(OH)Cl2)2 prepared by drying in vacuo the organic solutions from the extraction into benzene of aqueous vanadyl chloride solution with trioctylamine (TOA, R3N) and trioctylmethylammonium chloride (TOMAC, R3R′NCl), were studied by thermogravimetry and differential thermal analysis under an atmosphere of nitrogen, and the products of their thermal decomposition, such as volatile matter and residues, by gas chromatography. X-ray diffraction and infrared spectroscopy. It was found that the complexes with TOA and TOMAC thermally decompose to V2O3 at 200–300° by cracking of the compounds R3NHVO(OH)Cl2 and R3R′NVO(OH)Cl2 formed via dissociation of the complexes at about 150°.

Zusammenfassung

Die Komplexe (R3NHVO(OH)Cl2)2 und (R3R′NVO(OH)Cl2)2 wurden hergestellt, indem benzolische und wässrige Vanadylchlorid-Lösungen mit Trioctylamin (TOA, R3N) und Trioctylmethylammoniumchlorid (TOMAC, R3R′NCl) extrahiert und die erhaltenen Lösungen im Vakuum eingedampft wurden. Die Komplexen wurden in Stickstoffatmosphäre mittels TG und DTA untersucht und die thermischen Zersetzungsprodukte, und zwar sowohl die flüchtigen Verbindungen als auch die Rückstände, gaschromatographisch bzw. röntgendiffraktometrisch und IR-spektroskopisch bestimmt. Es wurde festgestellt, daß die Komplexe mit TOA und TOMAC bei 150° in die Verbindungen R3NHVO(OH)Cl2 und R3R′NVO(OH)Cl2 dissoziieren, die bei 200–300° thermisch zu V2O3 zersetzt werden.

Резюме

Комплексы (R3NHVO(OH)Cl2)2 и (R3R′NVO(OH)Cl2)2 были получены отгонкой в вакууме бензольных экстрактов водных ра створов ванадил хлорида с три октиламином (R3М,ТОА) и с триоктилмет иламмоний хлоридом (Т ОМАК, R3R′NCl). Термическое разложение комплекс ов было изучено в атмо сфере азота с помощью термограви метрии и ДТА, а летучие продук ты и твердые остатки анализировались газ овой хроматографией, рентгенофазовым ана лизом и ИК спектроско пией. Установлено, что комп лексы при температур ы 200–300° разлагаются до V2О3 с расщеплением соединений R3NНVО(ОН)Сl2 и R3R′NVO(OH)Cl2, образующихся в р езультате диссоциац ии исходных комплексов при 150°.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. T. Sato and K. Adachi, J. Inorg. Nucl. Chem., 31 (1969) 1395.

    Google Scholar 

  2. T. Sato and H. Watanabe, Thermochim. Acta, 31 (1979) 159.

    Google Scholar 

  3. T. Sato, T. Nakamura and H. Watanabe, Anal. Chim. Acta, 98 (1978) 365.

    Google Scholar 

  4. T. Sato, Anal. Chim. Acta, 77 (1977) 344.

    Google Scholar 

  5. T. Sato and T. Nakamura, Thermochim. Acta, 47 (1981) 189.

    Google Scholar 

  6. T. Sato, S. Ikoma and T. Nakamura, J. Inorg. Nucl. Chem., 39 (1977) 395.

    Google Scholar 

  7. T. Sato and T. Takeda, J. Inorg. Nucl. Chem., 32 (1970) 3387.

    Google Scholar 

  8. J. Kinnunen and B. Wennerstrand, Chemist-Analyst, 46 (1957) 92.

    Google Scholar 

  9. E. g., P. A. Kiltz and D. Nicholls, J. Chem. Soc. A, (1966) 1175; J. Selbin, L. H. Holmes, J. Inorg. Nucl. Chem., 25 (1963) 1359; D. N. Sathyanarayana and C. C. Patel, J. Inorg. Nucl. Chem., 30 (1969) 207.

Download references

Author information

Authors and Affiliations

  1. Department of Applied Chemistry, Faculty of Engineering, Shizuoka University, Hamamatsu, Japan

    Taichi Sato, Takato Nakamura & Toru Takahashi

Authors
  1. Taichi Sato
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Takato Nakamura
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Toru Takahashi
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

We wish to thank the Koei Chemical Co. Ltd. for samples of TOA and TOMAC.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Sato, T., Nakamura, T. & Takahashi, T. Thermal decomposition of the solvent-extracted chloro complexes of vanadium(IV) with trioctylamine and trioctylmethylammonium chloride. Journal of Thermal Analysis 30, 97–106 (1985). https://doi.org/10.1007/BF02128119

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02128119

Keywords

Search

Navigation