Abstract
Two polymorphs of crystalline anhydrous manganese acetate, α-[Mn(O2CMe)2] (1) and β-[Mn(O2CMe)2] (2), were prepared under temperature-controlled solvothermal dehydration. X-ray single-crystal (and powder) diffractions revealed that compound 1 crystallizes in monoclinic (a = 9.763(4), b = 4.972(2), c = 6.122(3) A, β = 102.878(5)°, V = 289.7(2) A3, Z = 4) space group P2/c. Although it was early prepared, its single crystal structure is firstly determined and known as a two-dimensional (2D) layer structure; whereas, compound 2 demonstrates a three-dimensional diamondoid (dia-e) structure that people in its early X-ray single-crystal study was not aware of. Anhydrous α-[Mn(O2CMe)2] was discovered in 1967, which two-dimensional layer structure is firstly determined by the X-ray single-crystal analysis.
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