New functionalized dithia-12(13)-crown-4 ethers: Synthesis, complex formation, and extraction capacity
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1,4-Dioxa-7,10-dithiacyclododecane-8-carbonitrile, 1,4-dioxa-7,11-dithiacyclotridecan-9-one, its 2,4-dinitrophenylhydrazone, and unsubstituted 7,10-dithia-12-crown-4 were synthesized. The complexing ability of the four synthesized dioxadithiacrown compounds toward Ag(I), Pb(II), Hg(II), and Cd(II) ions was assessed by 1H NMR. The extracting ability of the three dioxadithiacrown compounds with respect to the Sn(II) ion from aqueous solutions was studied. The thermal stability of 1,4-dioxa-7,10-dithia-cyclododecane and the corresponding 8-carbonitrile was investigated.
Keywordsdithia-12(13)-crown-4 ethers Ag(I), Pb(II), Hg(II), Sn(II) ions complexing synthesis thermal stability extraction 1H NMR spectroscopy X-ray crystallographic analysis
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