Crystal structures of two dysprosium-aluminium-sodium [3.3.1] metallacryptates that form two-dimensional sheets.

The two [3.3.1] metallacryptate complexes, namely, poly[[μ(3)-acetato-hexa-kis-(μ-N,N-di-methyl-formamide)-bis-(N,N-di-methyl-formamide)bis-[salicyl-hydroxi-mato(2-)]hepta-kis-[salicyl-hydrox-im-ato(3-)]hexa-aluminium(III)dysprosium(III)penta-sodium(I)] N,N-di-methyl-formamide tetra-solvate monohydrate], [DyAl(6)Na(5)(OAc)(Hshi)(2)(shi)(7)(DMF)(8)]·4DMF·H(2)O or {[DyAl(6)Na(5)(C(7)H(5)NO(3))(2)(C(7)H(4)NO(3))(7)(C(2)H(3)O(2))(C(3)H(7)NO)(8)]·4C(3)H(7)NO·H(2)O} (n) , 1, and poly[[di-μ(4)-acetato-nona-kis-(μ-N,N-di-methyl-form-amide)-octa-kis-(N,N-di-methyl-formamide)tetra-kis-[sali-cyl-hydroximato(2-)]tetra-deca-kis-[salicyl-hydroximato(3-)]dodeca-aluminium(III)didysprosium(III)deca-sodium(I)] N,N-di-methyl-form-amide 6.335-solvate], [DyAl(6)Na(5)(OAc)(Hshi)(2)(shi)(7)(DMF)(8.5)](2)·6.335DMF or {[Dy(2)Al(12)Na(10)(C(7)H(5)NO(3))(4)(C(7)H(4)NO(3))(14)(C(2)H(3)O(2))(2)(C(3)H(7)NO)(17)]·6.335C(3)H(7)NO} (n) , 2, where shi(3-) is salicyl-hydroximate and DMF is N,N-di-methyl-formamide, both consist of an aluminium-based metallacryptand. In 1 and 2, the metallacryptand encapsulates a dysprosium(III) ion in the central cavity, and the resulting metallacryptates are connected to each other via sodium-DMF linkages to generate a two-dimensional sheet. The metallacryptates of 1 and 2 are the three-dimensional analogues of metallacrowns as the metallacryptates contain a metal-nitro-gen-oxygen cyclic repeat unit throughout the complexes. For 1 the building block of the two-dimensional sheet is comprised of only one type of metallacryptate, which is connected to four neighboring metallacryptates via four sodium-DMF linkages. In 2, the building block is a dimeric unit of two metallacryptates. Each dimeric metallacryptate unit is connected to four other dimeric units via six sodium-DMF linkages. The two metallacryptates of each dimeric unit can be considered enanti-omers of each other. In both 1 and 2, chirality is imparted to the metallacryptate due to the Λ and Δ propeller configurations of the four octa-hedral aluminium ions of the metallacryptand shell.