Publications Details

Crystal structures of polymerized lithium chloride and dimethyl sulfoxide in the form of {2LiCl·3DMSO}_n and {LiCl·DMSO}_n

Valdez, Nichole R.; Herman, David J.; Nemer, Martin; Rodriguez, Mark A.; Allcorn, Eric

Two novel LiCl·DMSO polymer structures were created by combining dry LiCl salt with dimethyl sulfoxide (DMSO), namely, catena-poly[[chlorido­lithium(I)]-μ-(dimethyl sulfoxide)-κ²O:O-[chlorido­lithium(I)]-di-μ-(dimethyl sulfoxide)-κ⁴O:O], [Li₂Cl₂(C₂H₆OS)₃]n, and catena-poly[lithium(I)-μ-chlorido-μ-(dimethyl sulfoxide)-κ₂O:O], [LiCl(C₂H₆OS)]n. The initial synthesized phase had very small block-shaped crystals (<0.08 mm) with monoclinic symmetry and a 2 LiCl: 3 DMSO ratio. As the solution evaporated, a second phase formed with a plate-shaped crystal morphology. After about 20 minutes, large (>0.20 mm) octa­hedron-shaped crystals formed. The plate crystals and the octa­hedron crystals are the same tetra­gonal structure with a 1 LiCl: 1 DMSO ratio. These structures are reported and compared to other known LiCl·solvent compounds.