A study of unsaturated pyrazolate-bridged diruthenium carbonyl complexes

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DOIResolve DOI: http://doi.org/10.1021/om020445r
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TypeArticle
Journal titleOrganometallics
ISSN0276-7333
Volume21
Issue22
Pages47354742; # of pages: 8
AbstractThe reaction of Ru3(CO)12 with approximately 3 equiv of 3,5-di-tert-butylpyrazole, (dbpz)H, in hexane at 170 C in a stainless steel autoclave afforded the unsaturated, pyrazolate-bridged diruthenium complex [Ru2(CO)5(dbpz)2] (2). The spectroscopic and structural analysis indicated that this compound contains a vacant coordination site at one axial position trans to the Ru-Ru linkage. This compound reacted with CO at room temperature to give the saturated complex [Ru2(CO)6(dbpz)2] (1b); its structure is analogous to that of the previously determined complexes [Ru2(CO)6(pz)2], pz = pyrazolate and 3,5-dimethyl pyrazolate, except that the equatorial CO ligands show a skew arrangement, an indication of steric constraints within the coordination sphere. Treatment of 2 with benzyl isocyanide or with pyridine in toluene leads to the formation of substitution products [Ru2(CO)4(L)(dbpz)2], L = CNCH2Ph and pyridine, in which the incoming donor ligand occupies an equatorial position at the saturated Ru center. The structural significance of this pyrazolate-bridged diruthenium complex 2 is discussed.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedNo
Identifier10309731
NPARC number12326979
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Record identifier6edf564c-f484-4458-a06d-1d124cc655e1
Record created2009-09-10
Record modified2016-05-09
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