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DOI: 10.1039/A902640A (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1999, 2731-2735

Discrete and polymeric iodoplumbates with Pb3I10 building blocks: [Pb3I10]4–, [Pb7I22]8–, [Pb10I28]8–, 1∞[Pb3I10]4– and 2∞[Pb7I18]4–

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Harald Krautscheid and Frieder Vielsack

Abstract

Iodoplumbate complexes were obtained by reaction of PbI2 with sodium iodide in polar organic solvents and precipitation with large cations. With diammonium cations [R3N(CH2)nNR3]2+ a series of polynuclear iodoplumbates could be isolated and characterized by single crystal X-ray diffraction. While [Bu3N(CH2)4NBu3]2[Pb3I10] 1, [Bu3N(CH2)4NBu3]4[Pb7I22] 2 and [Bu3N(CH2)4NBu3]4[Pb10I28] 3 contain discrete anions, the iodoplumbates [Me3N(CH2)5NMe3]2[Pb3I10] 4 and [Pr3N(CH2)5NPr3]2[Pb7I18] 5 consist of one-dimensional and two-dimensional co-ordination polymers, respectively. The [Pb3I10]4– anion in 1 can be regarded as a building block for the structures of 2, 4, 5 and, slightly modified, of 3. In spite of their related structures and similar compositions, these complexes are formed selectively and in good yield under appropriate reaction and crystallization conditions.

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