ESR study of some Cu(II)-oxazepam complexes
The CuL2X2 (L = 7-chlor-l,3-dihydro-3-hydroxi-5-phenyl-2H-l,4-benzodiazepin-2-one, also known as oxazepam, X = Cl, Br) complexes were prepared and investigated by ESR (electron spin resonance) method. Powder ESR spectra of CuL2X2 compounds at room temperature show the presence of monomeric species h...
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| Veröffentlicht in: | Applied magnetic resonance 1999-04, Vol.16 (4), p.499-506 |
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| creator | Forizs, E. David, L. Cozar, O. Chiş, V. Craciun, C. Tetean, R. Todica, M. |
| description | The CuL2X2 (L = 7-chlor-l,3-dihydro-3-hydroxi-5-phenyl-2H-l,4-benzodiazepin-2-one, also known as oxazepam, X = Cl, Br) complexes were prepared and investigated by ESR (electron spin resonance) method. Powder ESR spectra of CuL2X2 compounds at room temperature show the presence of monomeric species having an axial symmetry with a small rhombic distortion. In case of compounds with Cl there is a superposition of two nonequivalent mononuclear species, one with a ground state and another with a ground state. In pyridine (Py) and dimethylformamide (DMF) solutions the monomeric species prevail. Two different monomeric species, one with pseudotetrahedral (Td) and the other with elongated tetrahedral-octahedral symmetry, were evidenced in DMF solutions adsorbed on NaY zeolite. In Py-DMF solutions two monomeric species were also identified. Dimeric species appear in DMF and Py solutions adsorbed on NaY zeolite through the coordination of two Cu(II) ions at the same keto-oxygen from one oxazepam molecule. |
| doi_str_mv | 10.1007/BF03161946 |
| format | Article |
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Powder ESR spectra of CuL2X2 compounds at room temperature show the presence of monomeric species having an axial symmetry with a small rhombic distortion. In case of compounds with Cl there is a superposition of two nonequivalent mononuclear species, one with a ground state and another with a ground state. In pyridine (Py) and dimethylformamide (DMF) solutions the monomeric species prevail. Two different monomeric species, one with pseudotetrahedral (Td) and the other with elongated tetrahedral-octahedral symmetry, were evidenced in DMF solutions adsorbed on NaY zeolite. In Py-DMF solutions two monomeric species were also identified. Dimeric species appear in DMF and Py solutions adsorbed on NaY zeolite through the coordination of two Cu(II) ions at the same keto-oxygen from one oxazepam molecule.</description><identifier>ISSN: 0937-9347</identifier><identifier>EISSN: 1613-7507</identifier><identifier>DOI: 10.1007/BF03161946</identifier><language>eng</language><publisher>Heidelberg: Springer Nature B.V</publisher><subject>Dimethylformamide ; Electron paramagnetic resonance ; Electron spin ; Ground state ; Room temperature ; Spin resonance ; Symmetry ; Zeolites</subject><ispartof>Applied magnetic resonance, 1999-04, Vol.16 (4), p.499-506</ispartof><rights>Springer 1999.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c257t-f566245c7459e027519f8e48bafbc9bac0b8e9a834a61126fd2ca64767c5105b3</citedby><cites>FETCH-LOGICAL-c257t-f566245c7459e027519f8e48bafbc9bac0b8e9a834a61126fd2ca64767c5105b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.proquest.com/docview/2917921784?pq-origsite=primo$$EHTML$$P50$$Gproquest$$H</linktohtml><link.rule.ids>314,777,781,21369,21370,21371,21372,23237,27905,27906,33511,33684,33725,33986,34295,43640,43768,43786,43934,44048,64364,64368,72218</link.rule.ids></links><search><creatorcontrib>Forizs, E.</creatorcontrib><creatorcontrib>David, L.</creatorcontrib><creatorcontrib>Cozar, O.</creatorcontrib><creatorcontrib>Chiş, V.</creatorcontrib><creatorcontrib>Craciun, C.</creatorcontrib><creatorcontrib>Tetean, R.</creatorcontrib><creatorcontrib>Todica, M.</creatorcontrib><title>ESR study of some Cu(II)-oxazepam complexes</title><title>Applied magnetic resonance</title><description>The CuL2X2 (L = 7-chlor-l,3-dihydro-3-hydroxi-5-phenyl-2H-l,4-benzodiazepin-2-one, also known as oxazepam, X = Cl, Br) complexes were prepared and investigated by ESR (electron spin resonance) method. Powder ESR spectra of CuL2X2 compounds at room temperature show the presence of monomeric species having an axial symmetry with a small rhombic distortion. In case of compounds with Cl there is a superposition of two nonequivalent mononuclear species, one with a ground state and another with a ground state. In pyridine (Py) and dimethylformamide (DMF) solutions the monomeric species prevail. Two different monomeric species, one with pseudotetrahedral (Td) and the other with elongated tetrahedral-octahedral symmetry, were evidenced in DMF solutions adsorbed on NaY zeolite. In Py-DMF solutions two monomeric species were also identified. Dimeric species appear in DMF and Py solutions adsorbed on NaY zeolite through the coordination of two Cu(II) ions at the same keto-oxygen from one oxazepam molecule.</description><subject>Dimethylformamide</subject><subject>Electron paramagnetic resonance</subject><subject>Electron spin</subject><subject>Ground state</subject><subject>Room temperature</subject><subject>Spin resonance</subject><subject>Symmetry</subject><subject>Zeolites</subject><issn>0937-9347</issn><issn>1613-7507</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNpFkEtLxDAUhYMoWEc3_oKCGx9Uc_O6yVLLjBYGBB_rkmYScJia2rQw46-3MoKrcxYf58BHyDnQW6AU7x4WlIMCI9QByabCC5QUD0lGDcfCcIHH5CSlNaUgNWBGbuavL3kaxtUujyFPsfV5OV5W1VURt_bbd7bNXWy7jd_6dEqOgt0kf_aXM_K-mL-VT8Xy-bEq75eFYxKHIkilmJAOhTSeMpRggvZCNzY0zjTW0UZ7YzUXVgEwFVbMWSVQoZNAZcNn5GK_2_Xxa_RpqNdx7D-ny5oZQMMAtZio6z3l-phS70Pd9R-t7Xc10PpXRv0vg_8AuPBONw</recordid><startdate>19990401</startdate><enddate>19990401</enddate><creator>Forizs, E.</creator><creator>David, L.</creator><creator>Cozar, O.</creator><creator>Chiş, V.</creator><creator>Craciun, C.</creator><creator>Tetean, R.</creator><creator>Todica, M.</creator><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7XB</scope><scope>88I</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>M2P</scope><scope>P5Z</scope><scope>P62</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>Q9U</scope></search><sort><creationdate>19990401</creationdate><title>ESR study of some Cu(II)-oxazepam complexes</title><author>Forizs, E. ; David, L. ; Cozar, O. ; Chiş, V. ; Craciun, C. ; Tetean, R. ; Todica, M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c257t-f566245c7459e027519f8e48bafbc9bac0b8e9a834a61126fd2ca64767c5105b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Dimethylformamide</topic><topic>Electron paramagnetic resonance</topic><topic>Electron spin</topic><topic>Ground state</topic><topic>Room temperature</topic><topic>Spin resonance</topic><topic>Symmetry</topic><topic>Zeolites</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Forizs, E.</creatorcontrib><creatorcontrib>David, L.</creatorcontrib><creatorcontrib>Cozar, O.</creatorcontrib><creatorcontrib>Chiş, V.</creatorcontrib><creatorcontrib>Craciun, C.</creatorcontrib><creatorcontrib>Tetean, R.</creatorcontrib><creatorcontrib>Todica, M.</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>ProQuest Central Student</collection><collection>SciTech Premium Collection</collection><collection>Materials Science Database</collection><collection>Science Database</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Materials Science Collection</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central Basic</collection><jtitle>Applied magnetic resonance</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Forizs, E.</au><au>David, L.</au><au>Cozar, O.</au><au>Chiş, V.</au><au>Craciun, C.</au><au>Tetean, R.</au><au>Todica, M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>ESR study of some Cu(II)-oxazepam complexes</atitle><jtitle>Applied magnetic resonance</jtitle><date>1999-04-01</date><risdate>1999</risdate><volume>16</volume><issue>4</issue><spage>499</spage><epage>506</epage><pages>499-506</pages><issn>0937-9347</issn><eissn>1613-7507</eissn><abstract>The CuL2X2 (L = 7-chlor-l,3-dihydro-3-hydroxi-5-phenyl-2H-l,4-benzodiazepin-2-one, also known as oxazepam, X = Cl, Br) complexes were prepared and investigated by ESR (electron spin resonance) method. Powder ESR spectra of CuL2X2 compounds at room temperature show the presence of monomeric species having an axial symmetry with a small rhombic distortion. In case of compounds with Cl there is a superposition of two nonequivalent mononuclear species, one with a ground state and another with a ground state. In pyridine (Py) and dimethylformamide (DMF) solutions the monomeric species prevail. Two different monomeric species, one with pseudotetrahedral (Td) and the other with elongated tetrahedral-octahedral symmetry, were evidenced in DMF solutions adsorbed on NaY zeolite. In Py-DMF solutions two monomeric species were also identified. Dimeric species appear in DMF and Py solutions adsorbed on NaY zeolite through the coordination of two Cu(II) ions at the same keto-oxygen from one oxazepam molecule.</abstract><cop>Heidelberg</cop><pub>Springer Nature B.V</pub><doi>10.1007/BF03161946</doi><tpages>8</tpages></addata></record> |
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| subjects | Dimethylformamide Electron paramagnetic resonance Electron spin Ground state Room temperature Spin resonance Symmetry Zeolites |
| title | ESR study of some Cu(II)-oxazepam complexes |
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