Home Symbol which looks like a small house Up Solid circle with an upward pointer in it

Magnesium, bis(«eta»5-2,4-cyclopentadien-1-yl)-

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), References, Notes

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

Data compiled by: José A. Martinho Simões

Quantity Value Units Method Reference Comment
Deltafgas32.9 ± 1.1kcal/molReviewMartinho SimõesSelected data
Deltafgas34.70 ± 0.79kcal/molReviewMartinho Simões 

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), References, Notes

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

Data compiled by: José A. Martinho Simões

Quantity Value Units Method Reference Comment
Deltafsolid16.6 ± 1.0kcal/molReviewMartinho SimõesSelected data
Deltafsolid18. ± 0.7kcal/molCC-SBChipperfield, Sneyd, et al., 1979Value corrected based on a set of ancillary data by J.A. Martinho Simões; The enthalpy of combustion is not reported in Chipperfield, Sneyd, et al., 1979

Phase change data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Mass spectrum (electron ionization), References, Notes

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:
AC - William E. Acree, Jr., James S. Chickos
MS - José A. Martinho Simões

Quantity Value Units Method Reference Comment
Deltasub16.3 ± 0.31kcal/molN/APilcher and Skinner, 1983See also Hull, Reid, et al., 1967 and Turnbull, 1967.; AC
Deltasub16.3 ± 0.31kcal/molRSCHull, Reid, et al., 1967, 2MS

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), References, Notes

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

Data compiled by: José A. Martinho Simões

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

21,3-Cyclopentadiene (l) + magnesium (cr) = Magnesium, bis(η(5)-2,4-cyclopentadien-1-yl)- (cr) + Hydrogen (g)

By formula: 2C5H6 (l) + Mg (cr) = C10H10Mg (cr) + H2 (g)

Quantity Value Units Method Reference Comment
Deltar-34.06 ± 0.69kcal/molRSCHull, Reid, et al., 1967, 2Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970.

Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, References, Notes

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

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.

Mass spectrum
For Zoom
1.) Enter the desired X axis range (e.g., 100, 200)
2.) Check here for automatic Y scaling
3.) Press here to zoom

Additional Data

View image of digitized spectrum (can be printed in landscape orientation).

Due to licensing restrictions, this spectrum cannot be downloaded.

Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin Chemical Concepts
NIST MS number 150468

All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.


References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), Notes

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

Martinho Simões
Martinho Simões, J.A., Private communication (see http://webbook.nist.gov/chemistry/om/). [all data]

Chipperfield, Sneyd, et al., 1979
Chipperfield, J.R.; Sneyd, J.C.R.; Webster, D.E., J. Organometal. Chem., 1979, 178, 177. [all data]

Pilcher and Skinner, 1983
Pilcher, G.; Skinner, H.A., Thermochemistry of organometallic compounds, 1983, 43-90, https://doi.org/10.1002/9780470771686.ch2 . [all data]

Hull, Reid, et al., 1967
Hull, H.S.; Reid, Allen Forrest; Turnbull, Alan G., Heat of formation and bond energy of bis(cyclopentadienyl)magnesium, Inorg. Chem., 1967, 6, 4, 805-807, https://doi.org/10.1021/ic50050a032 . [all data]

Turnbull, 1967
Turnbull, AG, Thermochemistry of biscyclopentsdienyl metal compounds, Aust. J. Chem., 1967, 20, 12, 2757-621, https://doi.org/10.1071/CH9672757 . [all data]

Hull, Reid, et al., 1967, 2
Hull, H.S.; Reid, A.F.; Turnbull, A.G., Inorg. Chem., 1967, 6, 805. [all data]

Pedley and Rylance, 1977
Pedley, J.B.; Rylance, J., Computer Analysed Thermochemical Data: Organic and Organometallic Compounds, University of Sussex, Brigton, 1977. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds in Academic Press, New York, 1970. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), References