NON-RIGID MOLECULE OF COPPER(II) DIIMINATE CU[CF3C(NH)C(F)C(NH)CF3]2, ITS CONFORMATIONAL POLYMORPHISM IN CRYSTAL AND STRUCTURE IN SOLUTIONS (RAMAN, UV–VIS AND QUANTUM CHEMISTRY STUDY) Article Bukalov S.S., Aysin R.R., Leites L.A., Kurykin M.A., Khrustalev V.N. Journal of Molecular Structure. Vol. 1,098. 2015. P. 246-254