CRYSTAL STRUCTURE OF 1-CYCLOHEXYLPIPERAZINE-1,4-DIIUM DICHROMATE(VI)
H. Chebbi1,2, Smail R. Ben1,3, M.F. Zid1
1Universite de Tunis El Manar, Tunis, Tunisia
2Universite de Monastir, Monastir, Tunisia
3Universite de Carthage, Nabeul, Tunisia
Keywords: organic dichromate, synthesis, single crystal X-ray diffraction, crystal structure
Abstract
Single crystals of 1-cyclohexylpiperazine-1,4-diium dichromate(VI), (C10H22N2)[Cr2O7], were obtained by slow evaporation at room temperature from an aqueous solution of potassium dichromate, hydrochloric acid and 1-cyclohexylpiperazine. (C10H22N2)[Cr2O7] is triclinic ( P ) with a = 10.351(2) Å, b = 12.766(3) Å, c = 6.111(1) Å, a = 91.50(2)°, b = 104.26(3)°, g = 94.91(2)°, V = 778.8(3) Å3, and Z = 2. The structure determination performed from single crystal X-ray diffraction data leads to R 1/ wR 2 reliability factors of 0.032/0.078. The asymmetric unit of the title salt consists of one 1-cyclohexylpiperazine-1,4-diium dication and one dichromate dianion. These entities are linked together by N-H⋯O hydrogen bonds to form {(C10H22N2)[Cr2O7]} n infinite chains lying parallel to the (100) plane and running along the c axis. The intermolecular N-H⋯O hydrogen bonds link these chains into a two-dimensional network structure consolidated through C-H⋯O weak interactions.
|
