Synthesis and Crystal Structure of Bis(18-crown-6)oxoniumtefrabromomanganese(II)

摘要

A new complex compound,bis(18-crown-6)oxoniumtetrabromomanganese(II),2(H3O)~+(18-crown-6)-MnBr4~(2-),was prepared and studied by X-ray diffraction to reveal its unusual cubic crystal structure,space group Fd3,a 20.424 A,and Z 8.In this crystal structure,the complex cation(H3O)~+(18-crown-6)the point symmetry 3 position and the anionMnBr4~(2-)with the point symmetry 23.The complex cation(H3O)~+(18-crown-6)has a guest-host structure,and,unlike metal complexes by hydrogen bonds between H3O~+ hydrogens and 18-crown-6 oxygens,rather than by coordination bonds.The pyramidal cation H3O~+ in this crystal structure is statistically disordered,and the tetrahedral anionMnBr4~(2-)is reorientationally disordered.