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Article: Carbyne complexes of the group 6 metals containing 1,4,7-triazacyclononane and its 1,4,7-trimethyl derivative

TitleCarbyne complexes of the group 6 metals containing 1,4,7-triazacyclononane and its 1,4,7-trimethyl derivative
Authors
KeywordsCarbyne complexes
Electrochemistry
Group 6 metals
Macrocyclic amine ligands
Photochemistry
Issue Date1998
PublisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/jorganchem
Citation
Journal Of Organometallic Chemistry, 1998, v. 552 n. 1-2, p. 255-263 How to Cite?
AbstractInteraction of Cl(CO)2py2MCPh (M=Mo, W) with 1,4,7-trimethyl-1,4,7-triazacyclononane (Me3TACN) in THF, followed by metathesis using NaBPh4 in aqueous medium, readily afford [(Me3TACN)M(CO)2(CPh)]BPh4 (M=Mo (1a), W (2)). [(TACN)Mo(CO)2(CPh)]BPh4 (1b) is similarly prepared using the molybdenum precursor and 1,4,7-triazacyclononane (TACN). Complex 1a, 1b and 2 are stable in the presence of concentrated hydrochloric acid at room temperature. The crystal structures of 1a and 2 both show that the three nitrogen atoms of Me3TACN are not equidistant from the metal centre as a consequence of the different trans influences of the carbyne and carbonyl groups. Complexes 1a, 1b and 2 exhibit intense absorption bands at 320-340 nm and weak absorptions in the 400-500 nm region, while excitation of 2 at 330 nm in acetonitrile gives an emission at 630 nm with a lifetime of 83 ns (Φem=1.6×10-4) at room temperature. The cyclic voltammograms of 1a and 2 in acetonitrile consist of a quasi-reversible couple (-2.15 V vs. Cp2Fe0/+) and an irreversible wave (+0.77 V vs. Cp2Fe0/+). Both couples are assigned to ligand-centred processes. Reaction of Me3TACN with Cl(CO)2py2CrCPh in THF resulted in cleavage of the carbyne moiety to yield a binuclear product.
Persistent Identifierhttp://hdl.handle.net/10722/70257
ISSN
2015 Impact Factor: 2.336
2015 SCImago Journal Rankings: 0.732
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLee, FWen_HK
dc.contributor.authorChan, MCWen_HK
dc.contributor.authorCheung, KKen_HK
dc.contributor.authorChe, CMen_HK
dc.date.accessioned2010-09-06T06:21:11Z-
dc.date.available2010-09-06T06:21:11Z-
dc.date.issued1998en_HK
dc.identifier.citationJournal Of Organometallic Chemistry, 1998, v. 552 n. 1-2, p. 255-263en_HK
dc.identifier.issn0022-328Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/70257-
dc.description.abstractInteraction of Cl(CO)2py2MCPh (M=Mo, W) with 1,4,7-trimethyl-1,4,7-triazacyclononane (Me3TACN) in THF, followed by metathesis using NaBPh4 in aqueous medium, readily afford [(Me3TACN)M(CO)2(CPh)]BPh4 (M=Mo (1a), W (2)). [(TACN)Mo(CO)2(CPh)]BPh4 (1b) is similarly prepared using the molybdenum precursor and 1,4,7-triazacyclononane (TACN). Complex 1a, 1b and 2 are stable in the presence of concentrated hydrochloric acid at room temperature. The crystal structures of 1a and 2 both show that the three nitrogen atoms of Me3TACN are not equidistant from the metal centre as a consequence of the different trans influences of the carbyne and carbonyl groups. Complexes 1a, 1b and 2 exhibit intense absorption bands at 320-340 nm and weak absorptions in the 400-500 nm region, while excitation of 2 at 330 nm in acetonitrile gives an emission at 630 nm with a lifetime of 83 ns (Φem=1.6×10-4) at room temperature. The cyclic voltammograms of 1a and 2 in acetonitrile consist of a quasi-reversible couple (-2.15 V vs. Cp2Fe0/+) and an irreversible wave (+0.77 V vs. Cp2Fe0/+). Both couples are assigned to ligand-centred processes. Reaction of Me3TACN with Cl(CO)2py2CrCPh in THF resulted in cleavage of the carbyne moiety to yield a binuclear product.en_HK
dc.languageengen_HK
dc.publisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/jorganchemen_HK
dc.relation.ispartofJournal of Organometallic Chemistryen_HK
dc.subjectCarbyne complexesen_HK
dc.subjectElectrochemistryen_HK
dc.subjectGroup 6 metalsen_HK
dc.subjectMacrocyclic amine ligandsen_HK
dc.subjectPhotochemistryen_HK
dc.titleCarbyne complexes of the group 6 metals containing 1,4,7-triazacyclononane and its 1,4,7-trimethyl derivativeen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0022-328X&volume=552&spage=255&epage=263&date=1998&atitle=Carbyne+complexes+of+the+group+6+metals+containing+1,4,7-triazacyclononane+and+its+1,4,7-trimethyl+derivativeen_HK
dc.identifier.emailChe, CM:cmche@hku.hken_HK
dc.identifier.authorityChe, CM=rp00670en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0022-328X(97)00578-0-
dc.identifier.scopuseid_2-s2.0-0003290432en_HK
dc.identifier.hkuros32036en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0003290432&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume552en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage255en_HK
dc.identifier.epage263en_HK
dc.identifier.isiWOS:000073209500030-
dc.publisher.placeSwitzerlanden_HK
dc.identifier.scopusauthoridLee, FW=7403111574en_HK
dc.identifier.scopusauthoridChan, MCW=7402598116en_HK
dc.identifier.scopusauthoridCheung, KK=7402406613en_HK
dc.identifier.scopusauthoridChe, CM=7102442791en_HK

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