ISSN 2348-1218 (print) International Journal of Interdisciplinary Research and Innovations ISSN 2348-1226 (online) Vol. 9, Issue 3, pp: (17-25), Month: July - September 2021, Available at: www.researchpublish.com
Microwave irradiated synthesis, characterization as well as determination of stability of Copper (II) complexes with N;N'(‘6’-substituted-1,3,5 -triazine-2,4–diyl)bis(3oxobutanamide) as ligands Ambika Bhusange*1, Nirdosh Patil2, Shweta Patil, Parvati S G3, Sunanda Ravindranath4 Department of Chemistry, Appa Institute of Engineering and Technology, Vidya Nagar, Kalaburagi, Karanataka-585 103, India, E-mail:ambika22bhusange@gmail.com
Abstract: A few copper complexes with N,N'-(6-methyl-1,3,5-triazine-2,4-diyl)bis(3-oxobutanamide) (L1) and N,N'(6-phenyl-1,3,5-triazine-2,4-diyl)bis(3-oxobutanamide) (L2) have been reported in this paper. The electronic, IR, 1H NMR, Powder X ray diffraction, ESR spectral data indicate that Cu(II) complexes show coordination number six with ligands (L1) and (L2) with involvement of one water molecule coordinated to Cu(II) metal ion and this was confirmed by means of the analysed Cu(II) complexes which were studied spectrally and thermally. For the spectrophotometric analysis of Cu(II), a novel form of compound called copper(II) complexes containing L 1 as well as L2 has been produced at different temperatures i.e, 250C, 300C, 350C, 400C, 450C, and 500C,. The stability constants values were found to decline with increasing temperature. Gibb's free energy change (ΔG), change in entropy (ΔS), and change in enthalpy (ΔH) are thermodynamic variables were studied. It has been found that the formations of metal complexes are random and exothermic in nature. Keywords: Entropy, Exothermic, Complexes, Free energy, Spectra.
I. INTRODUCTION Heterocycles are the ring compounds that contain one or more diverse ring atoms (i.e. atom other than carbon like N, O, S, P, B, Si, As and Se). Five and six-membered compounds are the most important heterocyclic systems. These are main class compounds which include more than 50% of all well-known organic compounds. They can be drugs, vitamins and natural products[1]. In the ancient times, synthesis of heterocyclic compounds was important because of its broad application. Heterocyclic compounds obtained from nature are important to life[2]. In life science industry and industrial field‟s related to fine and special chemistry, heterocyclic compounds showed important role[3]. They consist of a class of natural and synthetic products; some of them showed good pharmacological property[4]. Triazines have a unique position in pharmaceutical chemistry. It is worked as protecting groups in natural chemistry. Triazines are reactive groups and flexible for different synthetic transformations[5]. Triazine is a six-membered heterocyclic compound with empirical formula C3H3N3. Its structure is analogous to the benzene ring in which three carbons of the ring are substituted by nitrogen atoms. 1,3,5-triazine isomer also called as s-triazine due to the symmetry of three nitrogen in the ring. This isomer is an oldest known organic compound. 1, 3, 5- Triazine represent a broadly used lead structure with remarkable applications in various fields[6]. s-Triazines derivatives are an important class of compounds showing many pharmacological activities (like antimicrobial activities). Due to various applications in different fields, 1, 3, 5-triazines constitute a well-known class of composites from an extended time and still continue of considerable interest[7]. Under
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