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Crystal-to-crystal Transformations in Heterometallic yttrium(III)-copper(I) Iodide Derivatives in a Confined Solvent-Free Environment: Influence of Solvated Yttrium Cations on the Nuclearity and Dimensionality of Iodocuprate Clusters

Crystal-to-crystal Transformations in Heterometallic yttrium(III)-copper(I) Iodide Derivatives in a Confined Solvent-Free Environment: Influence of Solvated Yttrium Cations on the Nuclearity and Dimensionality of Iodocuprate Clusters

Shashank Mishra, Erwann Jeanneau, Henry Chermette, Stéphane Daniele, Liliane G Hubert-Pfalzgraf

Dalton Trans. 2008 Feb 7;(5):620-30.

PMID: 18217118

Abstract:

The solvated yttrium iodide precursors [Y(L)(8)]I(3) (L = DMSO or DMF), prepared in situ by stirring YI(3)(Pr(i)OH)(4) in DMSO or DMF, react with CuI in the presence of NH(4)I to give ionic hetero-metallic species [Y(DMSO)(8)][Cu(2)(mu-I)I(4)] (1) and [Y(DMF)(8)][Cu(4)(mu(3)-I)(2)(mu-I)(3)I(2)] (2) in excellent yields. Re-crystallization of 1 from DMF afforded the mixed-solvate complex [Y(DMSO)(6)(DMF)(2)][CuI(3)][I] (3). Compounds 2 and 3 undergo unique crystal-to-crystal transformation via progressive substitution of DMF by water molecules in a confined, solvent-free environment. Thus, crystals of 3 transform into [Y(DMSO)(6)(H(2)O)(2)][CuI(3)][I] (4), whereas a discrete ion-pair assembly of 2 is first converted into a 1-D zig-zag structure [Y(DMF)(6)(H(2)O)(2)](3+)[Cu(7)(mu(4)-I)(3)(mu(3)-I)(2)(mu-I)(4)(I)](1infinity)(3-) (5) and finally into a 2-D sheet containing mixed-valent copper atoms, [Y(DMF)(6)(H(2)O)(3)](3+)[Cu(I)(7)Cu(II)(2)(mu(3)-I)(8)(mu-I)(6)](2infinity)(3-) (6). The bi- and tetrafurcate H-bonding between water ligands on yttrium and iodides of the Cu-I cluster plays a pivotal role in the evolution of structures 4-6. Formation of a wide range of iodocuprate structures in 1-6, from discrete mono-, di- or tetranuclear units to one- and two-dimensional extended arrays, reflects the influence of solvated yttrium cations on the nuclearity and dimensionality of Cu-I clusters. TG-DTA-MS studies and DFT calculations for these complexes have also been carried out in order to determine their thermal stability and have insight about aforesaid transformations.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP13470387	Yttrium(III) iodide		13470-38-7	Price

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