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Article: Syntheses of novel monomeric 1,4,7-trimethyl-1,4,7-triazacyclononane ruthenium complexes. Reactivities and structure of sterically encumbered cationic monoaquaruthenium(II) and monooxoruthenium(IV) complexes

TitleSyntheses of novel monomeric 1,4,7-trimethyl-1,4,7-triazacyclononane ruthenium complexes. Reactivities and structure of sterically encumbered cationic monoaquaruthenium(II) and monooxoruthenium(IV) complexes
Authors
Issue Date1994
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/dalton
Citation
Journal Of The Chemical Society, Dalton Transactions, 1994 n. 1, p. 57-62 How to Cite?
AbstractThe complexes [RuII(tacn)(bipy)(OH2)]2+ 1 and [RuIV(tacn)(bipy)O]2+ 2(tacn = 1,4,7-trimethyl-1,4,7-triazacyclononane, bipy = 2,2′-bipyridine) have been synthesised and their crystal structures determined: 1, monoclinic, space group C2/c, a = 34.093(4), b = 10.430(1), c = 17.369(2) Å, β = 118.54(1)°and Z = 8; 2, triclinic, space group 1̄, a = 10.795(1), b = 11.076(2), c = 11.248(1) Å, a = 110.41(2), β = 90.66(1), γ = 94.11(1)°and Z = 2. The structures reveal that tacn acts as a facial chelating ligand with bipy nearly perpendicular to the Ru=O and Ru-OH2 moieties. The RuIV=O and Ru-OH2 distances are 1.815(6) and 2.168(3) Å respectively. In aqueous solution both complexes display two reversible proton-coupled one-electron redox couples corresponding to the oxidation of RuII to RuIII and RuIII to RuIV. Complex 2 has been found to be a competent oxidant for alkene epoxidation. Preliminary-kinetic studies revealed the rate law, rate = k2[RuIV][alkene] where k2 at 299 K are (1.30 ± 0.11) × 10-3 and (2.52 ± 0.20) × 10-4 dm3 mol-1 s-1 for the epoxidation of styrene and norbornene respectively. The activation parameters have been measured and are discussed.
Persistent Identifierhttp://hdl.handle.net/10722/167847
ISSN
2002 Impact Factor: 3.023
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorCheng, WCen_US
dc.contributor.authorYu, WYen_US
dc.contributor.authorCheung, KKen_US
dc.contributor.authorChe, CMen_US
dc.date.accessioned2012-10-08T03:12:10Z-
dc.date.available2012-10-08T03:12:10Z-
dc.date.issued1994en_US
dc.identifier.citationJournal Of The Chemical Society, Dalton Transactions, 1994 n. 1, p. 57-62en_US
dc.identifier.issn1472-7773en_US
dc.identifier.urihttp://hdl.handle.net/10722/167847-
dc.description.abstractThe complexes [RuII(tacn)(bipy)(OH2)]2+ 1 and [RuIV(tacn)(bipy)O]2+ 2(tacn = 1,4,7-trimethyl-1,4,7-triazacyclononane, bipy = 2,2′-bipyridine) have been synthesised and their crystal structures determined: 1, monoclinic, space group C2/c, a = 34.093(4), b = 10.430(1), c = 17.369(2) Å, β = 118.54(1)°and Z = 8; 2, triclinic, space group 1̄, a = 10.795(1), b = 11.076(2), c = 11.248(1) Å, a = 110.41(2), β = 90.66(1), γ = 94.11(1)°and Z = 2. The structures reveal that tacn acts as a facial chelating ligand with bipy nearly perpendicular to the Ru=O and Ru-OH2 moieties. The RuIV=O and Ru-OH2 distances are 1.815(6) and 2.168(3) Å respectively. In aqueous solution both complexes display two reversible proton-coupled one-electron redox couples corresponding to the oxidation of RuII to RuIII and RuIII to RuIV. Complex 2 has been found to be a competent oxidant for alkene epoxidation. Preliminary-kinetic studies revealed the rate law, rate = k2[RuIV][alkene] where k2 at 299 K are (1.30 ± 0.11) × 10-3 and (2.52 ± 0.20) × 10-4 dm3 mol-1 s-1 for the epoxidation of styrene and norbornene respectively. The activation parameters have been measured and are discussed.en_US
dc.languageengen_US
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/daltonen_US
dc.relation.ispartofJournal of the Chemical Society, Dalton Transactionsen_US
dc.titleSyntheses of novel monomeric 1,4,7-trimethyl-1,4,7-triazacyclononane ruthenium complexes. Reactivities and structure of sterically encumbered cationic monoaquaruthenium(II) and monooxoruthenium(IV) complexesen_US
dc.typeArticleen_US
dc.identifier.emailChe, CM:cmche@hku.hken_US
dc.identifier.authorityChe, CM=rp00670en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1039/DT9940000057en_US
dc.identifier.scopuseid_2-s2.0-0343173528en_US
dc.identifier.issue1en_US
dc.identifier.spage57en_US
dc.identifier.epage62en_US
dc.identifier.isiWOS:A1994MQ59600010-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridCheng, WC=7402169293en_US
dc.identifier.scopusauthoridYu, WY=7403913673en_US
dc.identifier.scopusauthoridCheung, KK=7402406613en_US
dc.identifier.scopusauthoridChe, CM=7102442791en_US

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