PREPARATION AND CRYSTAL STRUCTURE OF DICYCLOHEXYLAMMONIUM CHROMATE [C_6H_(11)NH_3]_2[C_rO_4]

摘要

A novel two-dimensional Cr(VI) complex, [C_6H_(11)NH_3]_2lC_rO_4], has been prepared and structurally characterized by X-ray diffraction methods. The complex is triclinic, space grourj PI with a = 6.575(2), b= 8.384(2), c=15.075(3)A, alpha = 75.14(2), beta = 78.09(2;), gamma = 89.45(2) deg, F=785.1(3) A~3, Z = 2. The crystal structure of the complex consists of tetrahedral [CrO_4]~(2-) dianion layers and organic [C_6H_(11)NH_3]~+ cation layers. The chro-mate anions and protonated cyclohexylammonium cations are mainly stabilized through ionic bonding. An N-H…O hydrogen bond network between the N_(cyclohexylammonium) and O_(chromate) atoms ensures the cohesion and stability of the crystal structure.