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Phosphorus-containing podands

3. Effect of the length of the polyether chain of bis (ortho-(diethoxyphosphinylmethoxy)phenyl) ethers of oligoethylene glycols on their complexing ability towards alkali metal cations

  • Physical Chemistry
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Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Conclusions

  1. 1.

    Using a conductometric method in a mixed THF-CHCl3 solvent, the complex-forming abilities of bis(ortho-(diethoxyphosphinylmethoxy)phenyl) ethers of oligoethylene glycols towards alkali metal cations have been studied. Complex-forming ability towards Li+, Na+, K+, and Rb+ cations depends very much on the length of the polyether chain. In the case of the Cs+ cation the effectiveness increases monotonically with increase in the number of ethylene glycol units.

  2. 2.

    The complex-forming abilities of the higher members of the series of podands studied — bis(ortho-(diethoxyphosphinylmethoxy)phenyl) ethers of tetraethylene glycol and pentaethylene glycol — towards K+, Rb+, and Cs+ cations are comparable with, and in some cases exceed, those for 18-crown-6 and dibenzo-18-crown-6.

  3. 3.

    The enhanced effectiveness of the present class of podands (in comparison with podands with ortho-diethoxyphosphinylphenyl terminal groups) towards alkali metal cations of greater radius (K+, Rb+, Cs+) is explained by the participation of the O atom located at the α-position to the phosphoryl group in the coordination.

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Authors and Affiliations

  1. Institute for Physiologically Active Materials, Academy of Sciences of the USSR, Chernogolovka

    V. I. Evreinov, Z. N. Vostroknutova, A. N. Bovin, A. N. Degtyarev & E. N. Tsvetkov

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  1. V. I. Evreinov
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  2. Z. N. Vostroknutova
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  3. A. N. Bovin
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  4. A. N. Degtyarev
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  5. E. N. Tsvetkov
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Additional information

For previous communications, see [1, 2].

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 60–64, January, 1989.

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Evreinov, V.I., Vostroknutova, Z.N., Bovin, A.N. et al. Phosphorus-containing podands. Russ Chem Bull 38, 50–53 (1989). https://doi.org/10.1007/BF00953698

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  • DOI: https://doi.org/10.1007/BF00953698

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