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Article: Reactions of dimesityldioxoosmium(VI) with bidentate N-heterocycles. Crystal structure of a dioxoosmium(VI) complex containing a molecular square

TitleReactions of dimesityldioxoosmium(VI) with bidentate N-heterocycles. Crystal structure of a dioxoosmium(VI) complex containing a molecular square
Authors
Issue Date1996
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/organometallics
Citation
Organometallics, 1996, v. 15 n. 5, p. 1497-1501 How to Cite?
AbstractThe interaction of OsO2(mes)2 (mes = mesityl) with pyz (pyrazine) gave the pyrazinebridged dimer [OsO2(mes)2]2(μ-pyz) (1), which has been characterized by X-ray crystallography. The structure around Os in 1 is square pyramidal, with the pyrazine, two oxo ligands, and one mesityl group in the square plane. The Os-O distance and O-Os-O angle are 1.71 Å and 147.5°, respectively. The reaction of OsO2(mes)2 with 4,4′-bpy (4,4′-bipyridyl) and bpe (trans-1,2-bis(4-pyridyl)ethylene) in Et2O gave the oligomeric [OsO2(mes)2L]n (L = 4,4′-bpy (2), bpe (3)) in good yields. The 1H NMR spectra of 2 and 3 indicate that L's are coordinated in a symmetric fashion in these oligomers. The reaction of OsO2(mes)2 with 4,4′-bpy in CHCls followed by slow evaporation afforded the crystalline tetramer [OsO2-(mes)2(μ-4,4′-bpy)]4 (4). The crystal structure of the tetramer 4 contains the square-planar [Os(4,4′-bpy)]4 core with octahedral local geometry around each Os. The Os-O distance and O-Os-O angle are 1.6 Å and 159°, respectively. Treatment of OsO2(mes)2 with CNpy (4-cyanopyridine) gave [OsO2(mes)2]·[OsO2(mes) 2(CNpy)] (5). The structure of 5 consists of the four-coordinate [OsO2(mes)2] and five-coordinate [OsO2(mes)2(CNpy)] moieties, which are linked together via the Os=O⋯Os interaction. The Os-O distances in the [OsO2(mes)2] and [OsO2(mes)2(CNpy)] moieties in 5 are 1.69 and 1.71 Å, respectively. The (Os)O⋯Os distance is 2.78 Å, and the Os-O⋯Os angle is 170°. The Os-O stretching frequency for the above dimesityldioxoosmium(VI) complexes correlates well with the Os-O bond order and the coordination environment around Os.
Persistent Identifierhttp://hdl.handle.net/10722/69610
ISSN
2015 Impact Factor: 4.186
2015 SCImago Journal Rankings: 2.043
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLeung, WHen_HK
dc.contributor.authorCheng, JYKen_HK
dc.contributor.authorHun, TSMen_HK
dc.contributor.authorChe, CMen_HK
dc.contributor.authorWong, WTen_HK
dc.contributor.authorCheung, KKen_HK
dc.date.accessioned2010-09-06T06:15:14Z-
dc.date.available2010-09-06T06:15:14Z-
dc.date.issued1996en_HK
dc.identifier.citationOrganometallics, 1996, v. 15 n. 5, p. 1497-1501en_HK
dc.identifier.issn0276-7333en_HK
dc.identifier.urihttp://hdl.handle.net/10722/69610-
dc.description.abstractThe interaction of OsO2(mes)2 (mes = mesityl) with pyz (pyrazine) gave the pyrazinebridged dimer [OsO2(mes)2]2(μ-pyz) (1), which has been characterized by X-ray crystallography. The structure around Os in 1 is square pyramidal, with the pyrazine, two oxo ligands, and one mesityl group in the square plane. The Os-O distance and O-Os-O angle are 1.71 Å and 147.5°, respectively. The reaction of OsO2(mes)2 with 4,4′-bpy (4,4′-bipyridyl) and bpe (trans-1,2-bis(4-pyridyl)ethylene) in Et2O gave the oligomeric [OsO2(mes)2L]n (L = 4,4′-bpy (2), bpe (3)) in good yields. The 1H NMR spectra of 2 and 3 indicate that L's are coordinated in a symmetric fashion in these oligomers. The reaction of OsO2(mes)2 with 4,4′-bpy in CHCls followed by slow evaporation afforded the crystalline tetramer [OsO2-(mes)2(μ-4,4′-bpy)]4 (4). The crystal structure of the tetramer 4 contains the square-planar [Os(4,4′-bpy)]4 core with octahedral local geometry around each Os. The Os-O distance and O-Os-O angle are 1.6 Å and 159°, respectively. Treatment of OsO2(mes)2 with CNpy (4-cyanopyridine) gave [OsO2(mes)2]·[OsO2(mes) 2(CNpy)] (5). The structure of 5 consists of the four-coordinate [OsO2(mes)2] and five-coordinate [OsO2(mes)2(CNpy)] moieties, which are linked together via the Os=O⋯Os interaction. The Os-O distances in the [OsO2(mes)2] and [OsO2(mes)2(CNpy)] moieties in 5 are 1.69 and 1.71 Å, respectively. The (Os)O⋯Os distance is 2.78 Å, and the Os-O⋯Os angle is 170°. The Os-O stretching frequency for the above dimesityldioxoosmium(VI) complexes correlates well with the Os-O bond order and the coordination environment around Os.en_HK
dc.languageengen_HK
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/organometallicsen_HK
dc.relation.ispartofOrganometallicsen_HK
dc.titleReactions of dimesityldioxoosmium(VI) with bidentate N-heterocycles. Crystal structure of a dioxoosmium(VI) complex containing a molecular squareen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0276-7333&volume=15&spage=1497&epage=1501&date=1996&atitle=Reactions+of+dimesityldioxoosmium(VI)+with+bidentate+N-Heterocycles.++Crystal+structure+of+a+dioxoosmium(VI)+complex+containing+a+molecular+squareen_HK
dc.identifier.emailChe, CM: cmche@hku.hken_HK
dc.identifier.emailWong, WT: wtwong@hku.hken_HK
dc.identifier.authorityChe, CM=rp00670en_HK
dc.identifier.authorityWong, WT=rp00811en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/om950531+-
dc.identifier.scopuseid_2-s2.0-0000712378en_HK
dc.identifier.hkuros21860en_HK
dc.identifier.hkuros14609-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0000712378&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume15en_HK
dc.identifier.issue5en_HK
dc.identifier.spage1497en_HK
dc.identifier.epage1501en_HK
dc.identifier.isiWOS:A1996TY93100026-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLeung, WH=7201504510en_HK
dc.identifier.scopusauthoridCheng, JYK=7405940807en_HK
dc.identifier.scopusauthoridHun, TSM=6506894270en_HK
dc.identifier.scopusauthoridChe, CM=7102442791en_HK
dc.identifier.scopusauthoridWong, WT=7403973084en_HK
dc.identifier.scopusauthoridCheung, KK=7402406613en_HK

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