Abstract Different ketones such as cyclohexanone, cyclopentanone, acetophenone, 2- acetonaphthalene, 4-methylcyclohexanone in the presence of an hydrous CuCl 2 (catalytic amounts) at reflux condition for 2–4 hours, without using a solvent led to dimers 2-(1- cyclohexane-1-yl)-cyclohexanone 6, 2-cyclopentylidene cyclopentanone 10, trimer dodecahydrotriphenylene (DTP) 4, trindan (tricyclopentabenzene) 9, 1, 3, 5- ...
