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Article: Synthesis and structural characterisation of osmium carbonyl clusters containing azo ligands

TitleSynthesis and structural characterisation of osmium carbonyl clusters containing azo ligands
Authors
KeywordsAzo ligands
Carbonyl
Clusters
Osmium
Issue Date1999
PublisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/jorganchem
Citation
Journal Of Organometallic Chemistry, 1999, v. 589 n. 2, p. 180-190 How to Cite?
AbstractTreatment of [Os3(CO)10(NCMe)2] (1) with 1-(2-thiazolylazo)-2-naphthol resulted in two new clusters [(μ-H)Os3(CO)10{NC3HS-N=N-C 10H6(OH)}] (2) and [(μ-H)Os3(CO)9(μ-η3-NC 3H2S(N=N)C10H6(O)] (3) in 30 and 45% yields, respectively. Cluster 2 contains an azo ligand moiety in the usual orthometallated mode. In cluster 3, the O-H bond is cleaved in the azo ligand and acts as a five-electron donor in the triosmium framework. Treatment of 1 with 4-nitro-4′-aminoazobenzene yields only [(μ-H)Os3(CO)10(μ-NHC6H 4-N=N-C6H4NO2] (4) (35%) where the nitrogen atom symmetrically bridges the Os-Os bond. In another class of azo ligands, 2-[4-(diethylamino)phenylazo]benzoic acid reacts with 1 to give two complexes [(μ-H)Os3(CO)10(O2CC6H 4-N=N-C6H4NEt2)] (5) (50%) and [Os3(CO)9(μ-Cl)(μ-η2-OC(O)C 6H4N=NHC6H4NEt2)] (6) (17%). In cluster 5, the ligand is bonded to the metal core through a carboxylate which takes up an axial position; while in cluster 6, the two nonbonded Os atoms are symmetrically bridged by a chloride and by oxygen atom in the azo ligand. Treatment of 1 with 2-[4-(diethylamino)phenylazo]benzoic acid in refluxing THF produced 5 as the sole product. All the complexes 2-6 have been fully characterized in solution by conventional spectroscopic methods and in the solid state by single-crystal X-ray diffraction analysis. © 1999 Elsevier Science S.A.
Persistent Identifierhttp://hdl.handle.net/10722/68816
ISSN
2015 Impact Factor: 2.336
2015 SCImago Journal Rankings: 0.732
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorKong, FSen_HK
dc.contributor.authorWong, WTen_HK
dc.date.accessioned2010-09-06T06:07:59Z-
dc.date.available2010-09-06T06:07:59Z-
dc.date.issued1999en_HK
dc.identifier.citationJournal Of Organometallic Chemistry, 1999, v. 589 n. 2, p. 180-190en_HK
dc.identifier.issn0022-328Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/68816-
dc.description.abstractTreatment of [Os3(CO)10(NCMe)2] (1) with 1-(2-thiazolylazo)-2-naphthol resulted in two new clusters [(μ-H)Os3(CO)10{NC3HS-N=N-C 10H6(OH)}] (2) and [(μ-H)Os3(CO)9(μ-η3-NC 3H2S(N=N)C10H6(O)] (3) in 30 and 45% yields, respectively. Cluster 2 contains an azo ligand moiety in the usual orthometallated mode. In cluster 3, the O-H bond is cleaved in the azo ligand and acts as a five-electron donor in the triosmium framework. Treatment of 1 with 4-nitro-4′-aminoazobenzene yields only [(μ-H)Os3(CO)10(μ-NHC6H 4-N=N-C6H4NO2] (4) (35%) where the nitrogen atom symmetrically bridges the Os-Os bond. In another class of azo ligands, 2-[4-(diethylamino)phenylazo]benzoic acid reacts with 1 to give two complexes [(μ-H)Os3(CO)10(O2CC6H 4-N=N-C6H4NEt2)] (5) (50%) and [Os3(CO)9(μ-Cl)(μ-η2-OC(O)C 6H4N=NHC6H4NEt2)] (6) (17%). In cluster 5, the ligand is bonded to the metal core through a carboxylate which takes up an axial position; while in cluster 6, the two nonbonded Os atoms are symmetrically bridged by a chloride and by oxygen atom in the azo ligand. Treatment of 1 with 2-[4-(diethylamino)phenylazo]benzoic acid in refluxing THF produced 5 as the sole product. All the complexes 2-6 have been fully characterized in solution by conventional spectroscopic methods and in the solid state by single-crystal X-ray diffraction analysis. © 1999 Elsevier Science S.A.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.subjectAzo ligandsen_HK
dc.subjectCarbonylen_HK
dc.subjectClustersen_HK
dc.subjectOsmiumen_HK
dc.titleSynthesis and structural characterisation of osmium carbonyl clusters containing azo ligandsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0022-328X&volume=589&spage=180&epage=190&date=1999&atitle=Synthesis+and+structural+characterisation+of+osmium+carbonyl+clusters+containing+azo+ligandsen_HK
dc.identifier.emailWong, WT: wtwong@hku.hken_HK
dc.identifier.authorityWong, WT=rp00811en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0022-328X(99)00401-5-
dc.identifier.scopuseid_2-s2.0-0000807445en_HK
dc.identifier.hkuros53680en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0000807445&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume589en_HK
dc.identifier.issue2en_HK
dc.identifier.spage180en_HK
dc.identifier.epage190en_HK
dc.identifier.isiWOS:000083370700007-
dc.publisher.placeSwitzerlanden_HK
dc.identifier.scopusauthoridKong, FS=7201837458en_HK
dc.identifier.scopusauthoridWong, WT=7403973084en_HK

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