Mrs/Miss Bouchareb,

There is needed computational quantum chemistry: reactions thermodynamics and NBO analysis.

Hasna, a very interesting result.  Is your picture from the result of single crystal x-ray diffraction?  If so, would you be willing to share the .cif file for the structure.  A 3-dimensional look may help .  Also, what were the reaction conditions?

Thank you Bojidarka B. Ivanova for your answer , I just do  single crystal X-ray diffraction and infrared for my samples 

Thank you Joseph S Merola.. the complex was synthesised from the thiopheneacétic acid and imidazol in the  presence  of copper(II) chloride , I obtained a precipitate , which will be recrystallised in DMSO , after few days I obtained crystals  .