(1,4,7,10-Tetra­oxacyclo­dodeca­ne)(trideuteroacetonitrile)lithium perchlorate

In the title compound, [Li(C8H16O4)(CD3CN)]ClO4, the Li atom is penta­coordinate. The O atoms of the 12-crown-4 ether form the basal plane, whereas the N atom of the trideutero­aceto­nitrile occupies the apical position. The Li+ atom is displaced by 0.794 (6) Å toward the apical position from the plane formed by the O atoms because the Li+ atom is too large to fit in the cavity of the 12-crown-4 ether, resulting in a distorted square-pyramidal geometry about the Li+ atom

(μ-1,4,7,10-Tetra­oxacyclo­dodeca­ne)bis­[(1,4,7,10-tetra­oxacyclo­dodeca­ne)lithium] bis­(perchlorate)

12-Crown-4 ether (12C4) and LiClO4 combine to form the ionic title compound, [Li2(C8H16O4)3](ClO4)2, which is com­posed of discrete Li/12C4 cations and perchlorate anions. In the [Li2(12C4)3]2+ cation there are two peripheral 12C4 ligands, which each form four Li—O bonds with only one Li+ atom. Additionally there is a central 12C4 in which diagonal O atoms form one Li—O bond each with both Li+ atoms. Therefore each Li+ atom is penta­coordinated in a distorted square-pyramidal geometry, forming four longer bonds to the O atoms on the peripheral 12C4 and one shorter bond to an O atom of the central 12C4. The cation occupies a crystallographic inversion centre located at the center of the ring of the central 12C4 ligand. The Li+ atom lies above the cavity of the peripheral 12C4 by 0.815 (2) Å because it is too large to fit in the cavity