Composition and Stability of Copper(II) Complexes with [2.2.2]Cryptand in Aqueous and Aqueous Ethanol Solutions
Coordination equilibria in aqueous ethanol solutions of copper(II) and [2.2.2]cryptand are studied via spectrophotometry and potentiometry. It is shown that copper(II) ions form mononuclear, dinuclear, and protonated complexes with [2.2.2]cryptand. The stability constants of the formed complexes are...
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| Veröffentlicht in: | Russian Journal of Physical Chemistry A 2021-05, Vol.95 (5), p.968-973 |
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| container_title | Russian Journal of Physical Chemistry A |
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| creator | Isaeva, V. A. Kipyatkov, K. A. Gamov, G. A. Sharnin, V. A. |
| description | Coordination equilibria in aqueous ethanol solutions of copper(II) and [2.2.2]cryptand are studied via spectrophotometry and potentiometry. It is shown that copper(II) ions form mononuclear, dinuclear, and protonated complexes with [2.2.2]cryptand. The stability constants of the formed complexes are determined potentiometrically at
Т
= 298 K and µ → 0 in aqueous and aqueous ethanol solutions. It is established that an increase in ethanol concentration of the solution improves the stability of mono- and dinuclear complexes of copper(II) with [2.2.2]cryptand and reduces the stability of the protonated complex. It is demonstrated that the rise in the negative value of the Gibbs energy of formation of mononuclear copper(II) cryptate in aqueous ethanol mixtures is due to weakening the solvation of the complexing ion. |
| doi_str_mv | 10.1134/S0036024421050162 |
| format | Article |
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Т
= 298 K and µ → 0 in aqueous and aqueous ethanol solutions. It is established that an increase in ethanol concentration of the solution improves the stability of mono- and dinuclear complexes of copper(II) with [2.2.2]cryptand and reduces the stability of the protonated complex. It is demonstrated that the rise in the negative value of the Gibbs energy of formation of mononuclear copper(II) cryptate in aqueous ethanol mixtures is due to weakening the solvation of the complexing ion.</description><identifier>ISSN: 0036-0244</identifier><identifier>EISSN: 1531-863X</identifier><identifier>DOI: 10.1134/S0036024421050162</identifier><language>eng</language><publisher>Moscow: Pleiades Publishing</publisher><subject>Chemistry ; Chemistry and Materials Science ; Coordination compounds ; Copper ; Copper compounds ; Electrical measurement ; Ethanol ; Free energy ; Heat of formation ; Physical Chemistry ; Physical Chemistry of Solutions ; Potentiometric analysis ; Solvation ; Spectrophotometry ; Stability ; Stability constants</subject><ispartof>Russian Journal of Physical Chemistry A, 2021-05, Vol.95 (5), p.968-973</ispartof><rights>Pleiades Publishing, Ltd. 2021. ISSN 0036-0244, Russian Journal of Physical Chemistry A, 2021, Vol. 95, No. 5, pp. 968–973. © Pleiades Publishing, Ltd., 2021. Russian Text © The Author(s), 2021, published in Zhurnal Fizicheskoi Khimii, 2021, Vol. 95, No. 5, pp. 758–764.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c316t-a78b764fb46d6d898952e0524a4e637c2a41b2c317d0f364e272a8f101e0c3623</citedby><cites>FETCH-LOGICAL-c316t-a78b764fb46d6d898952e0524a4e637c2a41b2c317d0f364e272a8f101e0c3623</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1134/S0036024421050162$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1134/S0036024421050162$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids></links><search><creatorcontrib>Isaeva, V. A.</creatorcontrib><creatorcontrib>Kipyatkov, K. A.</creatorcontrib><creatorcontrib>Gamov, G. A.</creatorcontrib><creatorcontrib>Sharnin, V. A.</creatorcontrib><title>Composition and Stability of Copper(II) Complexes with [2.2.2]Cryptand in Aqueous and Aqueous Ethanol Solutions</title><title>Russian Journal of Physical Chemistry A</title><addtitle>Russ. J. Phys. Chem</addtitle><description>Coordination equilibria in aqueous ethanol solutions of copper(II) and [2.2.2]cryptand are studied via spectrophotometry and potentiometry. It is shown that copper(II) ions form mononuclear, dinuclear, and protonated complexes with [2.2.2]cryptand. The stability constants of the formed complexes are determined potentiometrically at
Т
= 298 K and µ → 0 in aqueous and aqueous ethanol solutions. It is established that an increase in ethanol concentration of the solution improves the stability of mono- and dinuclear complexes of copper(II) with [2.2.2]cryptand and reduces the stability of the protonated complex. It is demonstrated that the rise in the negative value of the Gibbs energy of formation of mononuclear copper(II) cryptate in aqueous ethanol mixtures is due to weakening the solvation of the complexing ion.</description><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Coordination compounds</subject><subject>Copper</subject><subject>Copper compounds</subject><subject>Electrical measurement</subject><subject>Ethanol</subject><subject>Free energy</subject><subject>Heat of formation</subject><subject>Physical Chemistry</subject><subject>Physical Chemistry of Solutions</subject><subject>Potentiometric analysis</subject><subject>Solvation</subject><subject>Spectrophotometry</subject><subject>Stability</subject><subject>Stability constants</subject><issn>0036-0244</issn><issn>1531-863X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp1kE9Lw0AQxRdRsFY_gLcFL3pI3T-TTXIsoWqh4KEKgkjYJBubkmbj7gbNt3djFQ8ic5iB-b33hkHonJIZpRyu14RwQRgAoyQkVLADNKEhp0Es-NMhmozrYNwfoxNrt4QAAIUJ0qneddrWrtYtlm2J107mdVO7AesKp7rrlLlcLq_wyDXqQ1n8XrsNfmYzXy-pGTo3yuoWz996pXv75fIzL9xGtrrBa930Y4Q9RUeVbKw6--5T9HizeEjvgtX97TKdr4KCU-ECGcV5JKDKQZSijJM4CZkiIQMJSvCoYBJozjwblaTiAhSLmIwrSqgiBReMT9HF3rcz2t9iXbbVvWl9ZMZCDp4QSeIpuqcKo601qso6U--kGTJKsvGv2Z-_eg3ba6xn21dlfp3_F30CZOF4Rw</recordid><startdate>20210501</startdate><enddate>20210501</enddate><creator>Isaeva, V. A.</creator><creator>Kipyatkov, K. A.</creator><creator>Gamov, G. A.</creator><creator>Sharnin, V. A.</creator><general>Pleiades Publishing</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20210501</creationdate><title>Composition and Stability of Copper(II) Complexes with [2.2.2]Cryptand in Aqueous and Aqueous Ethanol Solutions</title><author>Isaeva, V. A. ; Kipyatkov, K. A. ; Gamov, G. A. ; Sharnin, V. A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c316t-a78b764fb46d6d898952e0524a4e637c2a41b2c317d0f364e272a8f101e0c3623</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Chemistry</topic><topic>Chemistry and Materials Science</topic><topic>Coordination compounds</topic><topic>Copper</topic><topic>Copper compounds</topic><topic>Electrical measurement</topic><topic>Ethanol</topic><topic>Free energy</topic><topic>Heat of formation</topic><topic>Physical Chemistry</topic><topic>Physical Chemistry of Solutions</topic><topic>Potentiometric analysis</topic><topic>Solvation</topic><topic>Spectrophotometry</topic><topic>Stability</topic><topic>Stability constants</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Isaeva, V. A.</creatorcontrib><creatorcontrib>Kipyatkov, K. A.</creatorcontrib><creatorcontrib>Gamov, G. A.</creatorcontrib><creatorcontrib>Sharnin, V. A.</creatorcontrib><collection>CrossRef</collection><jtitle>Russian Journal of Physical Chemistry A</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Isaeva, V. A.</au><au>Kipyatkov, K. A.</au><au>Gamov, G. A.</au><au>Sharnin, V. A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Composition and Stability of Copper(II) Complexes with [2.2.2]Cryptand in Aqueous and Aqueous Ethanol Solutions</atitle><jtitle>Russian Journal of Physical Chemistry A</jtitle><stitle>Russ. J. Phys. Chem</stitle><date>2021-05-01</date><risdate>2021</risdate><volume>95</volume><issue>5</issue><spage>968</spage><epage>973</epage><pages>968-973</pages><issn>0036-0244</issn><eissn>1531-863X</eissn><abstract>Coordination equilibria in aqueous ethanol solutions of copper(II) and [2.2.2]cryptand are studied via spectrophotometry and potentiometry. It is shown that copper(II) ions form mononuclear, dinuclear, and protonated complexes with [2.2.2]cryptand. The stability constants of the formed complexes are determined potentiometrically at
Т
= 298 K and µ → 0 in aqueous and aqueous ethanol solutions. It is established that an increase in ethanol concentration of the solution improves the stability of mono- and dinuclear complexes of copper(II) with [2.2.2]cryptand and reduces the stability of the protonated complex. It is demonstrated that the rise in the negative value of the Gibbs energy of formation of mononuclear copper(II) cryptate in aqueous ethanol mixtures is due to weakening the solvation of the complexing ion.</abstract><cop>Moscow</cop><pub>Pleiades Publishing</pub><doi>10.1134/S0036024421050162</doi><tpages>6</tpages></addata></record> |
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| subjects | Chemistry Chemistry and Materials Science Coordination compounds Copper Copper compounds Electrical measurement Ethanol Free energy Heat of formation Physical Chemistry Physical Chemistry of Solutions Potentiometric analysis Solvation Spectrophotometry Stability Stability constants |
| title | Composition and Stability of Copper(II) Complexes with [2.2.2]Cryptand in Aqueous and Aqueous Ethanol Solutions |
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