International Science Community Association Research Journal of Chemical Sciences 2231-606X 12 2 2022 06 18 Kinetics of Aquation of Hexakis (Urea) Chromium (III) Chloride 25 31 EN Narmatha M 1 Vivekanand College of Engineering for Women, Namakkal, Elaiyampalayam, Tamil Nadu, India I.V. Haruna 1 Department of Geology, Modibbo Adama University of Technology, Yola P.M.B. 2076, Yola – Nigeria H.A. Ahmed 2 Department of Geology, Modibbo Adama University of Technology, Yola P.M.B. 2076, Yola – Nigeria B.M. Suleiman 3 Department of Geology, Modibbo Adama University of Technology, Yola P.M.B. 2076, Yola – Nigeria Rao Sangeetha 1 KLE’s S. Nijalingappa College, Rajajinagar, Bengaluru-10, India . Umeh 1 Gombe state University, Faculty of Sciences, Department of Chemistry, Gombe, Nigeria Michael Chukwudi 2 Gombe state University, Faculty of Sciences, Department of Chemistry, Gombe, Nigeria Karu Elisha 3 Gombe state University, Faculty of Sciences, Department of Chemistry, Gombe, Nigeria Nnamani 4 Gombe state University, Faculty of Sciences, Department of Chemistry, Gombe, Nigeria Onuorah Johnson 5 > Research Paper 2021 4 22 2022 06 18 Chromium hexaurea complex was synthesized and characterized by two different spectroscopic techniques. The UV-Vis spectra showed a maximum absorbance at 290nm while IR spectra showed v(C=N) stretching vibration in the free urea occurred at 1681cm-1 but shifted down to 1633cm-1in the complex a change of 48cm-1 indicating a bonding to nitrogen, The kinetics of the aquation of Hexakis (urea) chromium (III) chloride complex has been shown to follow first order kinetics with average rate constant kobs (25oC, 40oC and 50oC) to be 2.5×10-2, 3.04×10-2 and 3.3×10-2 respectively and the corresponding activation parameters of ∆H*= +5.19kJK-1, ∆S* = -258JK-1 and ∆G*25=82.25kJK-1, ∆G*40=85.62kJK-1, ∆G*50=88.199kJK-1indicative associative mechanism. Copyright@ International Science Community Association