Synthesis and Characterization of Copper(I) Halide Complexes with N-(2,6-Diisopropylphenyl)-N '-benzoylthiourea: Monomeric, Dimeric, and Cage Structures

Abstract

The N-(2,6-diisopropylphenyl)-N'-benzoylthiourea ligand (shown as L) (1) was synthesized and characterized. Reactions of 1 with CuCl2 and CuBr2 afforded the monomeric L2CuCl (2) and dimeric LBrCu(mu-L) (3), respectively, due to the reduction of Cu-II. The reaction of 1 and CuCl gave the same product L2CuCl (2), while the treatment of 1 with CuBr led to the formation of a rare example of adamantanoid cage (LCu)(2)(-L)(2)Cu-2(-Br)(4) (4) containing enantiomeric couple. The product of 1 and Cu-I was found to be dimeric LICu(mu-L) (5), which is isomorphous to 3. All compounds obtained were fully characterized by elemental analysis, IR, H-1 NMR and C-13 NMR spectroscopy, and single-crystal X-ray diffraction.