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- W2073048605 abstract "Abstract Solvent extraction of lead halides with 18-crown-6 (18C6), dicyclohexano-18-crown-6 (DC18C6, cis-syn-cis and cis-anti-cis isomers) in chloroform was studied, and the extraction constants corrected for side reactions and ionic strength effects were obtained. The compounds of the same composition as those being extracted were also isolated in crystal form. The molecular structure of the [Pb(18C6)I2] complex has been determined. Crystals are monoclinic, P21/n, a = 11.237(2), b = 10.992(2), c = 8.139(2)A, β = 97.32(3)°, V = 997.1(7)A3, Dcalc = 2.416(2)gcm−3, Z = 2 for the composition C12H24O6PbI2. The final R-factor is 0.043 for 558 unique reflections. The lead atom is coordinated to six oxygen atoms of the crown ether and two iodine atoms forming a hexagonal bipyramidal coordination polyhedron. The 18C6 molecule and the two halogen atoms form a hydrophobic coating for the lead atom which may be assumed to be the main reason of high extraction constants of the iodine complexes. For 10-coordinate lead..." @default.
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- W2073048605 date "1995-04-01" @default.
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- W2073048605 title "Reaction of lead halides with 18-crown-6 and dicyclohexano-18-crown-6: Solvent extraction, synthesis and crystal structure of [Pb(18-crown-6)I2]" @default.
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- W2073048605 doi "https://doi.org/10.1080/10610279508028934" @default.
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