4H-1-Benzopyran-4-one, 2,3-dihydro-

• Formula: C₉H₈O₂
• Molecular weight: 148.1586
• IUPAC Standard InChI: InChI=1S/C9H8O2/c10-8-5-6-11-9-4-2-1-3-7(8)9/h1-4H,5-6H2 Copy

  
• IUPAC Standard InChIKey: MSTDXOZUKAQDRL-UHFFFAOYSA-N Copy
• CAS Registry Number: 491-37-2
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: 4-Chromanone; Chroman-4-one; Chromanone; Isochromanone; 2,3-Dihydro-4-benzopyranone; 2,3-Dihydro-2-benzopyran-4-one; Chromonone
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Phase change data
  • Mass spectrum (electron ionization)
  • Gas Chromatography
  • References
  • Notes
• Options:
  • Switch to calorie-based units

Data at NIST subscription sites:

• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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.

Phase change data

Go To: Top, Mass spectrum (electron ionization), Gas Chromatography, 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:
BS - Robert L. Brown and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos

Reduced pressure boiling point

Enthalpy of fusion

Mass spectrum (electron ionization)

Go To: Top, Phase change data, Gas Chromatography, 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.

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

Gas Chromatography

Go To: Top, 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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Kovats' RI, non-polar column, isothermal

View large format table.

Normal alkane RI, polar column, custom temperature program

View large format table.

References

Go To: Top, Phase change data, Mass spectrum (electron ionization), Gas Chromatography, Notes

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

Matos, Sousa, et al., 2009
Matos, M. Agostinha R.; Sousa, Clara C.S.; Morais, Victor M.F., Experimental and computational thermochemistry of the isomers: Chromanone, 3-isochromanone, and dihydrocoumarin, The Journal of Chemical Thermodynamics, 2009, 41, 3, 308-314, https://doi.org/10.1016/j.jct.2008.08.012 . [all data]

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]

Arruda, Heinzen, et al., 1993
Arruda, A.C.; Heinzen, V.E.F.; Yunes, R.A., Relationship between Kovats retention indices and molecular connectivity indices of tetralones, coumarins and structurally related compounds, J. Chromatogr., 1993, 630, 1-2, 251-256, https://doi.org/10.1016/0021-9673(93)80461-G . [all data]

Shu and Shen, 2008
Shu, N.; Shen, H., Aroma-impact compounds in Lysimachia foenum-graecum extracts, Flavour Fragr. J., 2008, 24, 1, 1-6, https://doi.org/10.1002/ffj.1908 . [all data]

Notes

Go To: Top, Phase change data, Mass spectrum (electron ionization), Gas Chromatography, References

• Symbols used in this document:
  

  Tboil	Boiling point
  ΔfusH	Enthalpy of fusion
  ΔsubH°	Enthalpy of sublimation at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
• The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
• Customer support for NIST Standard Reference Data products.