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Oxygen Atom Transfer from Pyridylpyridazine Chelated Oxidorhenium(V) Complex to Diphosphines: Twin Isomerization, Effects of Diphosphine Spacer Length and Metal Oxidation State

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1TitleTitle of DocumentOxygen Atom Transfer from Pyridylpyridazine Chelated Oxidorhenium(V) Complex to Diphosphines: Twin Isomerization, Effects of Diphosphine Spacer Length and Metal Oxidation State
2CreatorAuthor's name, affiliation, country BIKASH KUMAR PANDA1, BISWARUP MONDAL2, UMASANKAR SENAPATI3 and SUMAN SENGUPTA4*
1Department of Chemistry, Jangipur College, Jangipur, Murshidabad - 742213, W.B., India
2Department of Chemistry, Sitananda College, Nandigram, Purba Medinipur-721631, W.B., India
3Department of Chemistry, Santipur College, Santipur, Nadia-741404, W.B., India
4Department of Chemistry, Ananda Chandra College, Jalpaiguri-735101, W.B., India
3SubjectDicipline(s) Chemical Science
3SubjectKeywords Oxygen atom transfer, Twin isomerization, Pyridylpyridazine, Rhenium
4DescriptionAbstract The bimolecular reaction of ReVOCl3(dppz), 1, (where dppz is 3,6-di(2-pyridyl) pyridazine) with excess diphosphine Ph2P(CH2)xPPh2 (x=1-4) has furnished ReIII(OPPh2 (CH2)x PPh2)Cl3 (dppz), 2 with a dangling phosphine function which is spontaneously converted in solution to ReIII(PPh2 (CH2)xP(O)Ph2)Cl3 (dppz), 3. The complex 2 (x=1) on reaction with excess 1 affords mononuclear ReIII(OPPh2 (CH2)P(O)Ph2)Cl3(dppz), 4 while for x= 2-4 binuclear complex (dppz)Cl3ReIII(OPPh2 (CH2)xPPh2O)ReIIICl3 (dppz), 5 was obtained. Rate studies of the twin isomerization (linkage-cum-geometrical) reaction 2→3 revealed that the reaction is intramolecular in nature. It is initiated by the nucleophilic attack of the metal by the dangling phosphine function. The process slows down nearly exponentially as the diphosphine spacer length x increases. The oxidized complex [ReIV(OPPh2 (CH2)PPh2)Cl3 (dppz)]ReO4, 6 does not isomerize.
5PublishersOrganizing agency, location WWW Publications, India
6Contributor Sponsor(s) -
7DateDate (YYYY-MM-DD) -
8TypeStatus & genre Peer-reviewed Article
8TypeType
9FormateFile Formate PDF
10IdentifierUniform Resource Identifier Click Here
10IdentifierDigital Object Identifier DOI:10.7598/cst2015.1039
11SourceJournal/conference title; vol., no. (Year)Chemical Science Transactions, Volume  4 , Number  (3), (2015)
12LanuguageEnglish=en en
13RelationSupp.files
14Coverage -
15CopyrightCopyright and permissions
Chemical Science Transactions | Chem Sci Trans | CST | Online Chemistry Journal | Open Access
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