en>Rjwilmsi: /* References */Added 1 doi to a journal cite using AWB (10102)

2014-05-07T16:51:11Z

References: Added 1 doi to a journal cite using AWB (10102)

en>CitationCleanerBot: Various citation & identifier cleanup, plus AWB genfixes. Report errors and suggestions at User talk:CitationCleanerBot. using AWB

2011-09-10T21:35:36Z

Various citation & identifier cleanup, plus AWB genfixes. Report errors and suggestions at User talk:CitationCleanerBot. using AWB

New page

{{chembox
| Watchedfields = changed
| verifiedrevid = 439552228
| ImageFile1 = Structure of Ruthenium (III) acac.png
| ImageSize1 = 180px
| ImageFile2 =
| ImageSize2 =
| IUPACName = Tris(acetylacetonato)Ruthenium (III)
| OtherNames = Ru(acac)3; Ruthenium (III) 2,4-Pentanedionate; Ruthenium (III) acetylacetonato, 2,4-pentanedione ruthenium (III)
| Section1 = {{Chembox Identifiers
| Abbreviations =
| CASNo = 14284-93-6
| CASNo_Ref = {{cascite|correct|??}}
| EINECS =
| PubChem = 16057901
| SMILES =
| InChI = 1S/3C5H8O2.Ru/c3*1-4(6)3-5(2)7;/h3*3H2,1-2H3;
| RTECS =
| MeSHName =
| ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI =
| KEGG_Ref = {{keggcite|correct|kegg}}
| KEGG =
| SMILES = CC(=O)CC(=O)C.CC(=O)CC(=O)C.CC(=O)CC(=O)C.[Ru]
| ATCCode_prefix =
| ATCCode_suffix =
| ATC_Supplemental =}}
| Section2 = {{Chembox Properties
| Formula = (C5H7O2)3Ru
| MolarMass = 398.39 g/mol
| Appearance = Dark Violet Solid
| Density = 1.54 g/cm3<ref name=ActaCryst>{{cite journal
| title = Crystal and molecular structure of tris(acetylacetonato)ruthenium(III)
| author = Chao, G.
| journal = Acta Crystallographica B
| year = 1973
| volume = 29
| issue = 12
| pages = 2845
| doi = 10.1107/S0567740873007636
| last2 = Sime
| first2 = R. L.
| last3 = Sime
| first3 = R. J.
}}</ref>
| MeltingPt = 260 °C
| Melting_notes =
| BoilingPt =
| Boiling_notes =
| Solubility = insoluble in water
| SolubleOther = soluble in most organic solvents
| Solvent =
| pKa =
| pKb = }}
| Section7 = {{Chembox Hazards
| EUClass =
| EUIndex =
| MainHazards =
| NFPA-H =
| NFPA-F =
| NFPA-R =
| NFPA-O =
| RPhrases = {{R36}}, {{R37}}, {{R38}}
| SPhrases = {{S26}}, {{S36}}
| RSPhrases =
| FlashPt =
| Autoignition =
| ExploLimits =
| PEL = }}
}}
'''Ruthenium(III) acetylacetonate''' is a [[coordination complex]] with the formula [[Ruthenium|Ru]](O2C5H7)3. O2C5H7)3 is the ligand called [[acetylacetonate]]. This compound exists as a dark violet solid that is soluble in most organic solvents.<ref>R.C. Mehrotra, R. Bohra, and D.P. Gaur "Metal β-Diketonates and Allied Derivatives", 1st ed.; Academic Press inc.: New York, 1978. ISBN 0-12-488150-5.</ref> It is used as a precursor to other compounds of ruthenium.

==Preparation==
In 1914 tris(acetylacetonato)ruthenium (III) was first prepared by the reaction of [[ruthenium(III) chloride]] and [[acetylacetone]] in the presence of [[potassium bicarbonate]].<ref>{{cite journal
| title = Systematic chemical investigations: ruthenium, rhodium, palladium
| author = Barbieri, G. A.
| journal = Atti accad, Lincei
| year = 1914
| volume = 23
| issue = 1
| pages = 334–40
| doi =
}}</ref> Since then, alternative synthetic routes have been examined, but the original procedure remains useful with minor variations:<ref>{{cite journal
| title = Improved synthesis and reactivity of tris(acetylacetonato)ruthenium(III)
| author = Gupta, A.
| journal = Indian journal of chemistry. Section A, Inorganic, bio-inorganic, physical, theoretical & analytical chemistry
| year = 2000
| volume = 39A
| issue = 4
| pages = 457
| issn = 0376-4710
}}</ref>
:RuCl3•3H2O + MeCOCH2COMe → Ru(acac)3 + 3 HCl + 3 H2O

==Structure and properties==
This compound has idealized D3 symmetry. Six oxygen atoms surround the central ruthenium atom in an octahedral arrangement. The average Ru-O bond length in Ru(acac)3 is 2.00 Å.<ref name=ActaCryst/> Because Ru(acac)3 is low spin, there is one unpaired ''d'' electron, causing this compound to be paramagnetic. Ru(acac)3 has a magnetic susceptibility, χM, of 3.032×10−6 cm3/mol with an effective magnetic moment, μeff, of 1.66 μB.<ref>{{cite journal
| title = The absorption spectra and magnetic properties of the chelated compounds of Ru(III) with β-diketones
| author = Grobelny, R.
| journal = Journal of inorganic and nuclear chemistry
| year = 1966
| volume = 28
| issue = 11
| pages = 2715
| doi = 10.1016/0022-1902(66)80398-6
}}</ref> As a solution in [[dimethylformamide|DMF]], the compound oxidizes at 0.593 and reduces at -1.223 V vs the [[ferrocene]]/[[ferrocenium]] couple.<ref>{{cite journal
| title = Alkyl Substituent Effects in the Redox Thermochemistry of Coordination Compounds: Oxidation and Reduction Energetics for Ruthenium Tris(β-diketonate) Complexes in Solution and the Gas Phase
| author = Paul Sharpe, N. George Alameddin, David E. Richardson
| journal = Journal of the American Chemical Society
| year = 1994
| volume = 116
| issue = 24
| pages = 11098–11108
| doi = 10.1021/ja00103a027
}}</ref>

Reduction of Ru(acac)3 in the presence of [[alkenes]] affords the related diolefin complexes. Typically, such reactions are conducted with [[zinc]] [[amalgam (chemistry)|amalgam]] in moist [[tetrahydrofuran]]:<ref>{{cite journal
| title = The fragment bis(acetylacetonato)ruthenium: a meeting-point of coordination and organometallic chemistry
| author = Bennett, M. A.
| journal = Journal of Organometallic Chemistry
| year = 2004
| volume = 689
| issue = 24
| pages = 4463
| doi = 10.1016/j.jorganchem.2004.07.027
| last2 = Byrnes
| first2 = Matthew J.
| last3 = Kováčik
| first3 = Ivan
}}</ref>
:2 Ru(acac)3 + 4 alkene + Zn → 2 Ru(acac)2(alkene)2 + Zn(acac)2
The resulting compounds are rare examples of metal-alkene complexes that reversibly sustain oxidation:
:Ru(acac)2(alkene)2 <math>\overrightarrow{\leftarrow}</math> [Ru(acac)2(alkene)2]+ + e-

==References==
{{reflist}}

[[Category:Ruthenium compounds]]
[[Category:Acetylacetonate complexes]]

Cunningham function - Revision history

en>Rjwilmsi: /* References */Added 1 doi to a journal cite using AWB (10102)

en>CitationCleanerBot: Various citation & identifier cleanup, plus AWB genfixes. Report errors and suggestions at User talk:CitationCleanerBot. using AWB