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Potentiometric study of complexation of phenylaza-15-crown-5, 4-nitrobenzo-15-crown-5 and dibenzopyridino-18-crown-6 and other derivative of 18-crowns-6 with Na+ ion in methanol

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Abstract

The complexation reaction of phenylaza-15-crown-5, and 4-nitrobenzo-15-crown-5, benzo-15-crown-5 and dibenzopyrdino-18-crwon-6, dibenzo-18-crown-6,dicyclohexyl-18-crown-6(cis and trans), and 18-crown-6 with Na+ ion in methanol have been studied by potentiometric method. The Na+ ion-selective electrode has been used both as indicator and reference electrode. The stoichiometry and stability constants of complexes of these crown ethers with sodium ion were evaluated by MINIQUAD program. The major trend of stability of resulting complexes of these macrocycle with Na+ ion varied in the order DCY18C6 > DB18C6 > 18C6 > DBPY18C6 > phenylaza-15C5 > benzo-15C5 > 4-nitrobenzo-15C5. The obtained results in particular stability constant of complexes of DBPY18C6, phenylaza-15C5 and 4-nitrobenzo-15C5 with sodium ion in comparison with other crowns ether are novel, and interesting.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Arak University, 38156-879, Arak, Iran

    Javad Zolgharnein, Ghasem Shahmoradi, Khosrow Zamani & Saeid Amani

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  1. Javad Zolgharnein
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  2. Ghasem Shahmoradi
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  4. Saeid Amani
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Correspondence to Javad Zolgharnein.

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Zolgharnein, J., Shahmoradi, G., Zamani, K. et al. Potentiometric study of complexation of phenylaza-15-crown-5, 4-nitrobenzo-15-crown-5 and dibenzopyridino-18-crown-6 and other derivative of 18-crowns-6 with Na+ ion in methanol. J Incl Phenom Macrocycl Chem 59, 99–103 (2007). https://doi.org/10.1007/s10847-007-9301-8

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