The impact of ion pair association upon the 1H NMR spectra of cationic complexes akin to Grubbs catalysts
A reconsideration of the 1H NMR spectra of cationic transition metal complexes exhibiting the features of cyclophanes on the basis of Mislow's classification of topic groups arrives at the conclusion that the spectral changes triggered by chiral counterions reflect an intracationic diastereotop...
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| Veröffentlicht in: | Magnetic resonance in chemistry 2010-04, Vol.48 (4), p.261-269 |
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| container_title | Magnetic resonance in chemistry |
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| creator | Schiemenz, Günter Paulus |
| description | A reconsideration of the 1H NMR spectra of cationic transition metal complexes exhibiting the features of cyclophanes on the basis of Mislow's classification of topic groups arrives at the conclusion that the spectral changes triggered by chiral counterions reflect an intracationic diastereotopication of enantiotopic protons rather than the existence of pairs of long‐lived diastereomeric ion pairs. Copyright © 2010 John Wiley & Sons, Ltd.
Formation of short‐lived ion pairs with a chiral anion renders five pairs of enantiotopic protons in the cations 2 diastereotopic and hence NMR‐spectroscopically non‐equivalent. A tilt of the molecular prisms as found occasionally in the solid state of salts of 2 with achiral anions is immaterial for the NMR phenomena. |
| doi_str_mv | 10.1002/mrc.2570 |
| format | Article |
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Formation of short‐lived ion pairs with a chiral anion renders five pairs of enantiotopic protons in the cations 2 diastereotopic and hence NMR‐spectroscopically non‐equivalent. A tilt of the molecular prisms as found occasionally in the solid state of salts of 2 with achiral anions is immaterial for the NMR phenomena.</description><identifier>ISSN: 0749-1581</identifier><identifier>ISSN: 1097-458X</identifier><identifier>EISSN: 1097-458X</identifier><identifier>DOI: 10.1002/mrc.2570</identifier><identifier>PMID: 20157902</identifier><language>eng</language><publisher>Chichester, UK: John Wiley & Sons, Ltd</publisher><subject>Catalysis ; Catalysts ; Cationic ; Classification ; cyclophanes ; enantiotopicity ; Ion pairs ; molecular prisms ; NMR ; Nuclear magnetic resonance ; ruthenium complexes ; Spectra ; Transition metals</subject><ispartof>Magnetic resonance in chemistry, 2010-04, Vol.48 (4), p.261-269</ispartof><rights>Copyright © 2010 John Wiley & Sons, Ltd.</rights><rights>Copyright 2010 John Wiley & Sons, Ltd.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fmrc.2570$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fmrc.2570$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27924,27925,45574,45575</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/20157902$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Schiemenz, Günter Paulus</creatorcontrib><title>The impact of ion pair association upon the 1H NMR spectra of cationic complexes akin to Grubbs catalysts</title><title>Magnetic resonance in chemistry</title><addtitle>Magn. Reson. Chem</addtitle><description>A reconsideration of the 1H NMR spectra of cationic transition metal complexes exhibiting the features of cyclophanes on the basis of Mislow's classification of topic groups arrives at the conclusion that the spectral changes triggered by chiral counterions reflect an intracationic diastereotopication of enantiotopic protons rather than the existence of pairs of long‐lived diastereomeric ion pairs. Copyright © 2010 John Wiley & Sons, Ltd.
Formation of short‐lived ion pairs with a chiral anion renders five pairs of enantiotopic protons in the cations 2 diastereotopic and hence NMR‐spectroscopically non‐equivalent. A tilt of the molecular prisms as found occasionally in the solid state of salts of 2 with achiral anions is immaterial for the NMR phenomena.</description><subject>Catalysis</subject><subject>Catalysts</subject><subject>Cationic</subject><subject>Classification</subject><subject>cyclophanes</subject><subject>enantiotopicity</subject><subject>Ion pairs</subject><subject>molecular prisms</subject><subject>NMR</subject><subject>Nuclear magnetic resonance</subject><subject>ruthenium complexes</subject><subject>Spectra</subject><subject>Transition metals</subject><issn>0749-1581</issn><issn>1097-458X</issn><issn>1097-458X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqF0cFq3DAQBmARGpptUsgTFN16cjojWZZ1LKbZLewmEDYkNyFLMlXXXruWTbNvXzvZpMdcZmDmYw7zE3KJcIUA7FvT2ysmJJyQBYKSSSryxw9kATJVCYocz8inGH8DgFKSfyRnDFBIBWxBwvaXp6HpjB1oW9HQ7mlnQk9NjK0NZpgHYzeVYXK4ojebOxo7b4fezN4-i2CpbZuu9k8-UrMLk27psh_LMs7C1Ic4xAtyWpk6-s_Hfk7ur39si1Wyvl3-LL6vk4AZhyRzLrOVMOhKxlzuwOeVEQjMK2MrW2YoU1M5JXjmclYBs7lH661ExR1yxc_J15e7Xd_-GX0cdBOi9XVt9r4do1aAmRTA8nel5DwFzFM-yS9HOZaNd7rrQ2P6g3794wSSF_A31P7wtkfQcz56ykfP-ejNXTH3_z7EwT-9edPvdCa5FPrhZqkLVYBaP271iv8D3M6RUw</recordid><startdate>201004</startdate><enddate>201004</enddate><creator>Schiemenz, Günter Paulus</creator><general>John Wiley & Sons, Ltd</general><scope>BSCLL</scope><scope>NPM</scope><scope>7X8</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>201004</creationdate><title>The impact of ion pair association upon the 1H NMR spectra of cationic complexes akin to Grubbs catalysts</title><author>Schiemenz, Günter Paulus</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i1630-6dd6cf5a1db22d8d0e8fa5102e9acfcb6174afd9536d82f02c8e1cec7193d1393</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Catalysis</topic><topic>Catalysts</topic><topic>Cationic</topic><topic>Classification</topic><topic>cyclophanes</topic><topic>enantiotopicity</topic><topic>Ion pairs</topic><topic>molecular prisms</topic><topic>NMR</topic><topic>Nuclear magnetic resonance</topic><topic>ruthenium complexes</topic><topic>Spectra</topic><topic>Transition metals</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Schiemenz, Günter Paulus</creatorcontrib><collection>Istex</collection><collection>PubMed</collection><collection>MEDLINE - Academic</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Magnetic resonance in chemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Schiemenz, Günter Paulus</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The impact of ion pair association upon the 1H NMR spectra of cationic complexes akin to Grubbs catalysts</atitle><jtitle>Magnetic resonance in chemistry</jtitle><addtitle>Magn. Reson. Chem</addtitle><date>2010-04</date><risdate>2010</risdate><volume>48</volume><issue>4</issue><spage>261</spage><epage>269</epage><pages>261-269</pages><issn>0749-1581</issn><issn>1097-458X</issn><eissn>1097-458X</eissn><abstract>A reconsideration of the 1H NMR spectra of cationic transition metal complexes exhibiting the features of cyclophanes on the basis of Mislow's classification of topic groups arrives at the conclusion that the spectral changes triggered by chiral counterions reflect an intracationic diastereotopication of enantiotopic protons rather than the existence of pairs of long‐lived diastereomeric ion pairs. Copyright © 2010 John Wiley & Sons, Ltd.
Formation of short‐lived ion pairs with a chiral anion renders five pairs of enantiotopic protons in the cations 2 diastereotopic and hence NMR‐spectroscopically non‐equivalent. A tilt of the molecular prisms as found occasionally in the solid state of salts of 2 with achiral anions is immaterial for the NMR phenomena.</abstract><cop>Chichester, UK</cop><pub>John Wiley & Sons, Ltd</pub><pmid>20157902</pmid><doi>10.1002/mrc.2570</doi><tpages>9</tpages></addata></record> |
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| ispartof | Magnetic resonance in chemistry, 2010-04, Vol.48 (4), p.261-269 |
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| source | Wiley Online Library All Journals |
| subjects | Catalysis Catalysts Cationic Classification cyclophanes enantiotopicity Ion pairs molecular prisms NMR Nuclear magnetic resonance ruthenium complexes Spectra Transition metals |
| title | The impact of ion pair association upon the 1H NMR spectra of cationic complexes akin to Grubbs catalysts |
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