Cobalt tris(acetylacetonate)


Phase change data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Δsub32.17 ± 0.96kcal/molMEMalkerova, Alikhanyan, et al., 1990Based on data from 318. to 382. K.

Enthalpy of sublimation

ΔsubH (kcal/mol) Temperature (K) Method Reference
33.0433. to 463.TGAFahlman and Barron, 2000
34.1 ± 1.6471.DSCMurray and Hill, 1987
25.60390.N/AGötze, Bloss, et al., 1970

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Method Reference Comment
22.4478.DSCSabolovic, Mrak, et al., 2004Value is abnormally large compared with Cr(acac)<sub>3</sub>- may undergo decomposition

Gas phase ion energetics data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

Electron affinity determinations

EA (eV) Method Reference Comment
2.038 ± 0.087IMRBSharpe, Eyler, et al., 1990EA given is actually -ΔGea(350 K). Between 2-Ph-quinone, 3-CN-1,3-diNO2benzene; B

Ionization energy determinations

IE (eV) Method Reference Comment
7.56 ± 0.05EIWestmore, Reimer, et al., 1981LLK
7.1 ± 0.2PEWestmore, Reimer, et al., 1981LLK
10.7 ± 0.3EIBancroft, Reichert, et al., 1968RDSH
7.80 ± 0.05EIBancroft, Reichert, et al., 1968RDSH
7.52PEBrittain, Horozoglu, et al., 1979Vertical value; LLK
7.52 ± 0.07PEEvans, Hamnett, et al., 1972Vertical value; LLK

IR Spectrum

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Coblentz Society, Inc.

Condensed Phase Spectrum

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IR spectrum
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Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

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Owner COBLENTZ SOCIETY
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin MACKENZIE CHEMICAL WORKS, INC., LONG ISLAND, NEW YORK
Source reference COBLENTZ NO. 4887
Date Not specified, most likely prior to 1970
State SOLID (KBr WAFER)
Instrument BECKMAN IR-4 (HYBRID PRISM-GRATING)
Resolution 4
Sampling procedure TRANSMISSION
Data processing DIGITIZED BY NIST FROM HARD COPY
Melting point 240 C
MW 356.26; D=1.43

This IR spectrum is from the Coblentz Society's evaluated infrared reference spectra collection.


References

Go To: Top, Phase change data, Gas phase ion energetics data, IR Spectrum, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Malkerova, Alikhanyan, et al., 1990
Malkerova, I.P.; Alikhanyan, A.S.; Sevast'yanov, V.G.; Grinberg, Ya.Kh.; Gorgoraki, V.I., Thermal behavior of 3d transition metal acetylacetonates, Zh. Neorg. Khim., 1990, 35, 2, 413. [all data]

Fahlman and Barron, 2000
Fahlman, Bradley D.; Barron, Andrew R., Substituent effects on the volatility of metal ?-diketonates, Adv. Mater. Opt. Electron., 2000, 10, 3-5, 223-232, https://doi.org/10.1002/1099-0712(200005/10)10:3/5<223::AID-AMO411>3.0.CO;2-M . [all data]

Murray and Hill, 1987
Murray, J.P.; Hill, J.O., DSC determination of the sublimation enthalpy of tris(2,4-pentanedionato)cobalt(III) and bis(2,4-pentanedionato) nickel(II) and -copper(II), Thermochimica Acta, 1987, 109, 2, 383-390, https://doi.org/10.1016/0040-6031(87)80034-5 . [all data]

Götze, Bloss, et al., 1970
Götze, H.-J.; Bloss, K.; Molketin, H., Dampfdruckbestimmung von Acetylacetonaten, Zeitschrift für Physikalische Chemie, 1970, 73, 46, 314-320, https://doi.org/10.1524/zpch.1970.73.46.314 . [all data]

Sabolovic, Mrak, et al., 2004
Sabolovic, Jasmina; Mrak, Zeljko; Kostrun, Sanja; Janekovic, August, Is the Enthalpy of Fusion of Tris(acetylacetonato)metal(III) Complexes Affected by Their Potential Energy in the Crystal State?, Inorg. Chem., 2004, 43, 26, 8479-8489, https://doi.org/10.1021/ic048900u . [all data]

Sharpe, Eyler, et al., 1990
Sharpe, P.; Eyler, J.R.; Richardson, D.E., Free Energies of Electron Attachment to Tris(acetylacetonate) and Tris(hexafluoroacetylacetonate) Transition-Metal Complexes in the Gas Phase: Experimental Results and Ligand Field Analysis, Inorg. Chem., 1990, 29, 15, 2779, https://doi.org/10.1021/ic00340a014 . [all data]

Westmore, Reimer, et al., 1981
Westmore, J.B.; Reimer, M.L.J.; Reichert, C., Ionization energies of metal chelates. Acetylacetonates, trifluoroacetylacetonates, and hexafluoroacetylacetonates of trivalent metals of the first transition series, Can. J. Chem., 1981, 59, 1797. [all data]

Bancroft, Reichert, et al., 1968
Bancroft, G.M.; Reichert, C.; Westmore, J.B., Mass spectral studies of metal chelates. II. Mass spectra and appearance potentials of acetylacetonates of trivalent metals of the first transition series, Inorg. Chem., 1968, 7, 870. [all data]

Brittain, Horozoglu, et al., 1979
Brittain, H.G.; Horozoglu, G.; Baker, A.D., The He(I) photoelectron spectra of some γ-substituted Co(III) acetylacetonate complexes, J. Electron Spectrosc. Relat. Phenom., 1979, 16, 107. [all data]

Evans, Hamnett, et al., 1972
Evans, S.; Hamnett, A.; Orchard, A.F.; Lloyd, D.R., Study of the metal-oxygen bond in simple tris-chelate complexes by He(I) photoelectron spectroscopy, Faraday Discuss. Chem. Soc., 1972, 54, 227. [all data]


Notes

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