NDLI: Chemistry of Tetraosmium Carbonyl Clusters with Phenylazopyridine Ligands: Synthesis, Structure and Electrochemistry

Content Provider	Springer Nature Link
Author	Li, Yat Wong, Wing Tak
Copyright Year	2001
Abstract	Two new tetraosmium carbonyl clusters [Os$_{4}$(μ-H)$_{4}$(CO)$_{11}${η $^{1}$-NC$_{5}$H$_{4}$(N=N)C$_{6}$H$_{5}$}] (1) and [Os$_{4}$(μ-H)$_{4}$(CO)$_{10}${η $^{2}$-NC$_{5}$H$_{4}$(N=N)C$_{6}$H$_{5}$}] (2) were synthesized from the reaction of [Os$_{4}$(μ-H)$_{4}$(CO)$_{12}$] with two equivalent of 2-phenylazopyridine ligand in dichloromethane at ambient temperature using trimethylamine-N-oxide as the decarbonylation reagent. Subsequent chromatographic purification led to the isolation of 1and 2as stable orange and blue solids in respectively 25 and 13% yields. Complex 1converted to 2in a 25% yield in refluxing chloroform. Treating a solution of [Os$_{4}$(μ-H)$_{4}$(CO)$_{12}$] in dichloromethane with two equivalent of 3-phenylazopyridine led to the formation of another two new clusters [Os$_{4}$(μ-H)$_{4}$(CO)$_{11}${η $^{1}$-NC$_{5}$H$_{4}$(N=N)C$_{6}$H$_{5}$}] (3) and [Os$_{4}$(μ-H)$_{4}$(CO)$_{10}$(NMe$_{3}$){η $^{1}$-NC$_{5}$H$_{4}$(N=N)C$_{6}$H$_{5}$}] (4), which could be isolated as yellow solids in 34% and 21% yields respectively. Thermolysis of 3or 4in refluxing n-hexane gives [Os$_{4}$(μ-H)$_{3}$(CO)$_{10}${μ-η $^{3}$-NC$_{5}$H$_{3}$(N=N)C$_{6}$H$_{5}$}] (5) in 24 and 33% yields respectively. Their electronic absorption properties and electrochemical behavior are also reported.
Starting Page	595
Ending Page	617
Page Count	23
File Format	PDF
ISSN	10407278
Journal	Journal of Cluster Science
Volume Number	12
Issue Number	4
e-ISSN	15728862
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2001-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Inorganic Chemistry Physical Chemistry Catalysis
Content Type	Text
Resource Type	Article
Subject	Chemistry Biochemistry Condensed Matter Physics Materials Science

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