Skip to main content
SpringerLink
Log in

Effect of the varying π-accepting properties of someortho-substituted benzoic acids on the stability of mixed-ligand complexes also containing quinizarin and thorium(IV)

Der Effekt verschiedener π-Acceptoreigenschaften einiger ortho-substituierter Benzoesäuren auf die Stabilität von Komplexen mit gemischten Liganden unter Beteiligung von Chinizarin und Thorium(IV)

  • Anorganische Und Physikalische Chemie
  • Published:
Monatshefte für Chemie / Chemical Monthly Aims and scope Submit manuscript

Abstract

The mixed-ligand complexes of thorium(IV) with quinizarin (quin) and as a second ligand,L, salicyclic acid (sa), thiosalicylic acid (tsa) or anthranilic acid (ant) were studied potentiometrically in 40% (v/v) ethanol-water medium [I=100 mmol dm−3 (KNO3), 25±0.1 °C]. The equilibria existing in solutions were demonstrated and the ternary stability constants of the 1:1:1 Th-quin-L-complexes were characterized. All of these biligand complexes are considerably more stable than the corresponding monoligand ones. In addition, the relatively most stable ternary complex is formed withant which is the best π-acceptor. The order of stability of the ternary complexes is in accordance with the calculated π-charge densities of the varying ligating group in the ligandL. The values of the equilibrium constants (log units) for the reaction: Th(quin)2+ThL 2⇌2Th(quin)(L) are 2.47 (0.13), 2.60 (0.3) and 4.25 (0.86) for Th(quin)(tsa), Th(quin)(sa) and Th(quin)(ant), respectively. The constants given in parentheses correspond to Δ logK Th (= logK )(L)Th(quin)Th(quin — logK ThThL ).

Zusammenfassung

Die gemischtligandigen Komplexe von Thorium(IV) mit Chinizarin (quin) und als zweiten Liganden (L) Salizylsäure (sa), Thisalizylsäure (tsa) oder Anthranilsäure (ant) wurden potentiometrisch in 40% (v/v) Ethanol-Wasser [I=100 mmol dm−3 (KNO3),t=25±0.1 °C] untersucht. Die vorliegenden Gleichgewichte wurden formuliert und die ternären Stabilitätskonstanten der 1:1:1 Th-quin-L-Komplexe bestimmt. Alle zweiligandigen Komplexe sind wesentlich stabiler als die entsprechenden Monoligand-Komplexe. Der relativ stabilste Komplex wurde mitant gebildet, daant der beste π-Acceptor ist. Die Reihung der relativen Stabilitäten stimmt mit den berechneten π-Elektronendichten der verschiedenen LigandenL überein. Die Werte der Gleichgewichtskonstanten (in log Einheiten) für die Reaktion Th(quin)2+ThL 2⇌2Th(quin)(L) sind 2.47 (0.13), 2.60 (0.30) and 4.25 (0.86) für Th(quin)(tsa), Th(quin)(sa) bzw. Th(quin)(ant), wobei die Werte in Klammern ΔlogK Th = logK )(L)/Th(quin)Th(quin — logK ThThL entsprechen.

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. Luo QH, Meng JX (1980) Kao Teng Hsueh Hsiao Hua Hsueh Pao, 1: 17

    Google Scholar 

  2. Ramalingam K, Krishnamoorthy CR (1982) Inorg Chim Acta 67: 167

    Google Scholar 

  3. Sharma CL, Jain PK (1977) Ind J Chem 15(A): 110

    Google Scholar 

  4. Sitaramalakshmi C, Venkateswarlu C (1975) Ind J Chem 13: 625

    Google Scholar 

  5. Pachauri OP, Tandon JP (1976) Monatsh Chem 107: 991

    Google Scholar 

  6. Pachauri OP, Tandon JP (1975) Z Natur Anorg Chem 30 B: 751;Pachauri OP, Tandon JP (1975) J Inorg Nucl Chem 27: 2321;Pachauri OP, Tandon JP (1976) Monatsh Chem 107: 83;Pachauri OP, Tandon JP (1977) Ind J Chem 15: 1

    Google Scholar 

  7. Nayan R (1981) J Inorg Nucl Chem 43: 3238

    Google Scholar 

  8. Idriss KA, Seleim MM, Abu-Baker MS, Saleh MS (1982) Analyst 107: 12

    Google Scholar 

  9. Idriss KA, Seleim MM, Abu-Baker MS, Saleh MS (1982) Ind J Chem 21 A: 395

    Google Scholar 

  10. Idriss KA, Seleim MM, Abu-Baker MS, Saleh MS (1984) Annali Chimia 74: 845

    Google Scholar 

  11. Idriss KA, Seleim MM, Hassan MK, Abu-Baker MS, Sedaira H (1985) Analyst 110: 705

    Google Scholar 

  12. Seleim MM, Idriss KA, Saleh MS, Hashem EY (1986) Analyst 111: 677

    Google Scholar 

  13. Seleim MM, Idriss KA, Saleh MS, Hashem EY (1986) Polyhedron 5: 1525

    Google Scholar 

  14. Irving HM, Rossotti HS (1953) J Chem Soc 1953: 3397; 1954: 2904

    Google Scholar 

  15. Chidambaram MV, Bhattacharya PK (1970) J Inorg Nucl Chem 32: 3271

    Google Scholar 

  16. Agrawal BH, Dwivedi K, Chandra M, Agrawala B, Dey KA (1977) J Ind Chem Soc 54: 931

    Google Scholar 

  17. Pariser R, Parr RC (1953) J Chem Phys 21: 767;Pople JA (1953) Trans Faraday Soc 49: 1375;Pariser R (1956) J Chem Phys 24: 250

    Google Scholar 

  18. Nishimoto K, Forster LS (1968) Bull Chem Soc Jpn 41: 2254

    Google Scholar 

  19. Idriss KA, Hassan MK, Abu-Baker MS, Sedaira H (1984) Analyst 109: 1389

    Google Scholar 

  20. Issa IM, Issa RM, Idriss KA, Hammam AM (1976) Ind J Chem 14(B): 117

    Google Scholar 

  21. Sigel H (1975) Angew Chem 87: 391; (1975) Angew Chem Int Ed Engl 14: 394

    Google Scholar 

  22. Dewitt R, Watters JI (1954) J Am Chem Soc 76: 3810

    Google Scholar 

  23. Kida S (1956) Bull Chem Soc Jpn 29: 805;Ramakrishna RS, Fernandopulla ME (1970) J Inorg Nucl Chem 33: 1940

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Assiut University, Assiut, Egypt

    Kamal A. Idriss, Mohamed M. Seleim, Anwar S. El-Shahawy, Magda S. Saleh & Hassan Sedaira

Authors
  1. Kamal A. Idriss
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Mohamed M. Seleim
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Anwar S. El-Shahawy
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Magda S. Saleh
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Hassan Sedaira
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Idriss, K.A., Seleim, M.M., El-Shahawy, A.S. et al. Effect of the varying π-accepting properties of someortho-substituted benzoic acids on the stability of mixed-ligand complexes also containing quinizarin and thorium(IV). Monatsh Chem 119, 683–691 (1988). https://doi.org/10.1007/BF00809681

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00809681

Keywords

Search

Navigation