International Science Community Association Research Journal of Chemical Sciences 2231-606X 12 1 2022 02 18 Synthesis and complexation of bis(thiourea) with Co(II) and Cu(II) ions 58 63 EN I.A. Ajayi 1 Industrial Unit, Chemistry Department, Faculty of Science, University of Ibadan, Nigeria O.B. Omolere 2 Industrial Unit, Chemistry Department, Faculty of Science, University of Ibadan, Nigeria Pachouri Manoj Kumar 1 Applied Science Department, Anand Engineering College, Keetham, Agra, 282007, India Mittal Pankaj 2 Applied Science Department, Anand Engineering College, Keetham, Agra, 282007, India Upadhyay Monika 1 Department of chemistry, University of Rajasthan, Jaipur 302004, India Singh R.V. 2 Department of chemistry, University of Rajasthan, Jaipur 302004, India Fahmi Nighat 3 Department of chemistry, University of Rajasthan, Jaipur 302004, India Sharma Asmita 1 Dept. of Chemistry, Shri Vaishnav Vidyapeeth Vishwavidyalaya, Indore, MP, India Sharma Rajesh 2 Devi Ahilya Vishwavidyalaya, Takshshila Campus, Khandwa Road, Indore, MP, India Mohammed Aliyu D. 1 Department of Chemistry, Umaru Musa Yar’adua University, PMB 2218, Katsina, Katsina state, Nigeria Abubakar Maryam Dodo 2 Department of Chemistry, Umaru Musa Yar’adua University, PMB 2218, Katsina, Katsina state, Nigeria Rathore Monika 1 Analytical Laboratory, Chemistry Department, Jai Narain Vyas University, Jodhpur, Rajasthan, India Singh Ishwar 2 Analytical Laboratory, Chemistry Department, Jai Narain Vyas University, Jodhpur, Rajasthan, India Bhati Punam Singh 3 Analytical Laboratory, Chemistry Department, Jai Narain Vyas University, Jodhpur, Rajasthan, India Nagar Sarika 4 Analytical Laboratory, Chemistry Department, Jai Narain Vyas University, Jodhpur, Rajasthan, India A.A. Siaka 1 Department of Applied Chemistry Federal University Dutsin-Ma Katsina State, Nigeria A. Ismail 2 Department of Applied Chemistry Federal University Dutsin-Ma Katsina State, Nigeria Somashekar Manjunatha A. 1 Department of Chemistry, Don Bosco Institute of Technology (Affiliated to Visvesvaraya Technological University - Belagavi), Mysore Road, Bengaluru 560 074, India Sukhdev Anu 2 Department of Chemistry, Presidency University, Bengaluru-560 064, India . Puttaswamy 3 Department of Chemistry, Jnanabharati Campus, Bangalore University, Bangalore-560 056, India T.S. Shashidhara 4 Department of Physics, Siddaganga College of Arts, Science and Commerce, Tumakuru, 572102, India Ahmed Abubakar Abdullahi 1 Department of Pure and Applied Chemistry, Faculty of Science, University of Maiduguri, P.M.B. 1069, Maiduguri, Borno State, Nigeria Chindo Almustapha Sulaiman 2 Department of Pure and Applied Chemistry, Faculty of Science, University of Maiduguri, P.M.B. 1069, Maiduguri, Borno State, Nigeria Mohammed Abdullahi Idi 3 Department of Pure and Applied Chemistry, Faculty of Science, University of Maiduguri, P.M.B. 1069, Maiduguri, Borno State, Nigeria > Research Paper 2021 5 29 2022 02 18 Bis(thiourea) was synthesized from reaction of semicarbazide hydrochloride and potassium thiocyanate in 1:1 molar ratio in aqueous medium. Interaction of the bis(thiourea) with chloride salts of cobalt(II) and copper(II) yielded the respective complexes of varying colours in excellent yield of 74.52% and 64.81% respectively. The bis(thiourea) and its complexes were characterized using FT-IR spectroscopy and various physicochemical techniques. The ligand has sharp melting point of 217°C indicating its purity whereas the Co(II) and Cu(II) decomposed at 190 and 340°C respectively, suggestive of thermostability. The molar conductance measurement revealed that the Co(II) complex was electrolytic in nature while Cu(II) was non-electrolyte. The complexes were hydrated as revealed by thermal and FT-IR analysis. Moreover, the results of FT-IR affirmed the coordination of the metal(II) ions to the bis(thiourea) through the two thionic Sulphur atoms (>C=S) hence acting as a bidentate ligand. On the basis of the spectral analysis, the complexes could be formulated as [CoL2]Cl2.H2O and [CuL2(OH)2].3H2O where L=bis(thiourea). Copyright@ International Science Community Association