International Science Community Association Research Journal of Chemical Sciences 15 4 2025 10 18 Effect of Temperature on the interaction of Alkali metal ions and 18-crown-6 ether in Binary system 35 41 EN Nainvi Brajesh 1 Department of Chemistry, V.S.S.D. College, Kanpur 208002 UP, India Singh Ashok 2 Department of Chemistry, V.S.S.D. College, Kanpur 208002 UP, India Lal Nand 3 Department of Chemistry, V.S.S.D. College, Kanpur 208002 UP, India Thakor Subhash B. 1 Shri PHG Muni, Arts & Science College, Gujarat University, Kalol–382721, Gujarat, India Patel V.G. 2 Department of Chemistry, Municipal Arts & Urban Bank Science College, Mehsana, Gujarat, India Akinyele O.A. 1 Department of Agricultural and Bio-Environmental Engineering, Federal College of Agriculture, Ibadan, Nigeria Bamgboye A.I. 2 Department of Agricultural and Environmental Engineering, University of Ibadan, Ibadan, Nigeria Chavan Jagdish U. 1 Department of Chemistry, PSGVPM’s SIP Arts, GBP Science and STKVS Commerce College, Shahada, 425409, MS, India Patil Rajendra V. 2 Department of Chemistry, PSGVPM’s SIP Arts, GBP Science and STKVS Commerce College, Shahada, 425409, MS, India Beldar Anil G. 3 Department of Chemistry, PSGVPM’s SIP Arts, GBP Science and STKVS Commerce College, Shahada, 425409, MS, India Dalohoun K. Joachim 1 Laboratory of Physical Chemistry, Materials and Molecular Modeling (LCP3M), National University of Sciences, Technologies, Engineering Et Mathematics, Benin Togbé F.C. Alexis 2 Laboratory of Physical Chemistry, Materials and Molecular Modeling (LCP3M), National University of Sciences, Technologies, Engineering Et Mathematics, Benin and City and Environment Department, Geosciences, Environment and Applications Laboratory, National University of Sciences, Technologies, Engineering Et Mathematics, Benin Ahlonsou Egbemimon Daniel 3 Laboratory of Physical Chemistry, Materials and Molecular Modeling (LCP3M), National University of Sciences, Technologies, Engineering Et Mathematics, Benin and City and Environment Department, Geosciences, Environment and Applications Laboratory, National University of Sciences, Technologies, Engineering Et Mathematics, Benin NDA Zeynabou Trall 4 City and Environment Department, Geosciences, Environment and Applications Laboratory, National University of Sciences, Technologies, Engineering Et Mathematics, Benin Toklo R. Modéran 5 Laboratory of Physical Chemistry, Materials and Molecular Modeling (LCP3M), National University of Sciences, Technologies, Engineering Et Mathematics, Benin Josse Roger Gérard 6 Laboratory of Physical Chemistry, Materials and Molecular Modeling (LCP3M), National University of Sciences, Technologies, Engineering Et Mathematics, Benin Garud R.S. 1 Department of Chemistry Ranilaxmibai Mahavidyalay, Parola, Dist Jalgaon 425111, MS, India Borse G.P. 2 Department of Chemistry Ranilaxmibai Mahavidyalay, Parola, Dist Jalgaon 425111, MS, India Patil K.H. 3 Department of Chemistry Ranilaxmibai Mahavidyalay, Parola, Dist Jalgaon 425111, MS, India > Research Paper 2025 9 13 2025 10 18 18-crown-6 ether is widely accepted for their selectivity complexation and interaction with higher alkali metal ion, even their binding and complexation efficiency is strongly influenced by the temperature. In this research work, we investigate the effect of Variation of temperature on the stability of the complex and interaction between 18-crown-6 and alkali metals (Rb+ & Cs+) in a binary liquid systems. Viscosity and density measurements were employed to determine molecular interaction and thermodynamic parameters like ∆H Copyright@ International Science Community Association