Infrared, Mid infrared and UV-Visible spectra study Cobalt chloride CoCl2. 6H2O molecule

IR, MIR, UV – Visible spectra have been studied for Cobalt chloride molecule (CoCl2. 6H2O) compound, In wide range spectra (40000 – 410) cm-1 specially MIR range. Assignment were achieved for the fundamental vibrational bands of (CoCl2 . 6H2O ) to symmetry stretching Ʋ1 (∑^+) Anti – symmetry stretching Ʋ3(∑^+), these bands are non-degenerate , and the bending band is Ʋ2(π) is doubly degenerate thought they have activity in IR and Raman , which explain the weakness in symmetry of this molecule, the fundamental bands for the molecule are centered at the following wave numbers (615, 685, 795, 1115, 1340, 1375, 1616.35, 2091, 2386, 2410, 3364) cm-1 which are corresponding to wave lengths (16260, 14598, 12578, 8968, 7462, 7272, 6186, 4782, 4191, 4149, 2972 ) nm The UV and visible spectra of the shows bands centered at (205.7) nm , (48614) cm-1 due to the electronic transition ( n Ϭ^*) , other band centered at (512) nm, (19531) cm-1 due to (n π^*) electronic transition