caa a22 4500 378886487 CHVBK 20180305123444.0 cr unu---uuuuu 161128e20040701xx s 000 0 eng 10.1524/zpch.218.7.857.35729 doi (NATIONALLICENCE)gruyter-10.1524/zpch.218.7.857.35729 Compressibility Behaviour of some Copper (I) Perchlorate Complexes in Binary Mixtures of Acetonitrile with Nitromethane and Dimethylsulfoxide at 298.15K [Elektronische Daten] [Dip Singh Gill, Vivek Pathania, Avnesh Kumari, Hardeep Anand, S. P. Jauhar] Ultrasonic velocity (u) and density (ρ) of the binary mixtures of acetonitrile (AN) with nitromethane (NM) and dimethylsulfoxide (DMSO) as well as of the solutions of Bu4NBPh4, Bu4NClO4, [Cu(CH3CN)4]ClO4, [Cu(Phen)2]ClO4, [Cu(DMPhen)2]ClO4 and [Cu((NH2)2CS)4]ClO4 have been measured over the entire composition range at 298.15K. Using these data, isentropic compressibilities (Ks) and apparent molal isentropic compressibilities (Ks,ϕ) for various salts have been calculated and used for the evaluation of limiting apparent molal isentropic compressibilities (Ks,ϕ0). The Ks,ϕ0 values of various salts have been split into the contribution of individual ions (Ks,ϕ0)±. The (Ks,ϕ0)± values for all copper (I) cations [Cu(CH3CN)4]+, [Cu(Phen)2]+, [Cu(DMPhen)2]+ and [Cu((NH2)2CS)4]+ are negative and large, for Bu4N+ and Ph4B− are positive and large at all compositions in both AN + NM and AN + DMSO mixtures but for ClO4− are negative in AN + DMSO mixtures and positive in AN + NM mixtures. The variation of (Ks,ϕ0)± values with solvent composition indicates that both DMSO and NM interact with complex copper (I) cations forming complex ions of the type [Cu(CH3CN)4 − x(S)x]+ (x = 1-4 and S = co-solvent) and [Cu(ligand)2]+(CH3CN)y(S)z in which AN is systematically replaced by the co-solvents. DMSO interacts more strongly with complex copper (I) cations and ClO4− ion as compared to NM. Bu4N+ and Ph4B− show some special interaction with AN which decreases with the increase of NM or DMSO composition in the mixture. © 2004 Oldenbourg Wissenschaftsverlag GmbH Thermodynamics & statistical physics nationallicence Laboratory techniques, experiments nationallicence Physical chemistry nationallicence Gill Dip Singh aut Pathania Vivek aut Kumari Avnesh aut Anand Hardeep aut Jauhar S. P. aut Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics Oldenbourg Wissenschaftsverlag GmbH 218/7/2004(2004-07-01), 857-865 0942-9352 218:7/2004<857 2004 218 zpch https://doi.org/10.1524/zpch.218.7.857.35729 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/zpch.218.7.857.35729 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gill Dip Singh aut NATIONALLICENCE 700 1- Pathania Vivek aut NATIONALLICENCE 700 1- Kumari Avnesh aut NATIONALLICENCE 700 1- Anand Hardeep aut NATIONALLICENCE 700 1- Jauhar S. P. aut NATIONALLICENCE 773 0- Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics Oldenbourg Wissenschaftsverlag GmbH 218/7/2004(2004-07-01), 857-865 0942-9352 218:7/2004<857 2004 218 zpch CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter