cyc-C6H4C=O

Vibrational and/or electronic energy levels

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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: Marilyn E. Jacox

State:   D
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
Tx = 51700 Ar Simon, Schweig, et al., 1992

State:   C
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
Tx = 44600 Ar Simon, Schweig, et al., 1992

State:   B
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
Tx = 36500 Ar Simon, Schweig, et al., 1992

State:   A
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
Td = 29000 U Ar Simon, Munzel, et al., 1990

State:   X

Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
a1 C=O stretch 1869 vs Ar IR Simon, Schweig, et al., 1992
Ring stretch 1591 w m Ar IR Simon, Schweig, et al., 1992
Ring stretch 1059 w Ar IR Simon, Schweig, et al., 1992
b1 CH OPLA 749 w m Ar IR Simon, Schweig, et al., 1992
C=O OPLA 591 w m Ar IR Simon, Schweig, et al., 1992
b2 Mixed 1451 w m Ar IR Simon, Schweig, et al., 1992
C=O bend 721 w m Ar IR Simon, Schweig, et al., 1992
Ring deform. 620 w Ar IR Simon, Schweig, et al., 1992

Additional references: Jacox, 1994, page 419

Notes

wWeak
mMedium
vsVery strong
UUpper bound
xEnergy separation between the band maximum of the excited electronic state and the v = 0 level of the ground state.
dPhotodissociation threshold

References

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

Simon, Schweig, et al., 1992
Simon, J.G.G.; Schweig, A.; Xie, Y.; Schaefer, H.F., III, The UV/VIS and IR absorption spectra of benzocyclopropenone in solid argon at 12 K, Chem. Phys. Lett., 1992, 200, 6, 631, https://doi.org/10.1016/0009-2614(92)80101-G . [all data]

Simon, Munzel, et al., 1990
Simon, J.G.G.; Munzel, N.; Schweig, A., Matrix isolation photochemistry: photoequilibrium between transient o-benzyne, carbon monoxide and transient cyclopentadienylideneketene in an argon matrix, Chem. Phys. Lett., 1990, 170, 2-3, 187, https://doi.org/10.1016/0009-2614(90)87113-6 . [all data]

Jacox, 1994
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]

Notes

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