CNN Radical


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:   ?


 Energy 
 (cm-1
 Med.   Transition   λmin 
 (nm) 
 λmax 
 (nm) 
 References

Tx = 51070 T N2 Jacox, 1978

State:   C


 Energy 
 (cm-1
 Med.   Transition   λmin 
 (nm) 
 λmax 
 (nm) 
 References

To = 48540 ± 50 Ar C-X 206 206 Jacox, 1978
To = 49100 ± 50 N2 C-X 204 204 Jacox, 1978

State:   B


 Energy 
 (cm-1
 Med.   Transition   λmin 
 (nm) 
 λmax 
 (nm) 
 References

To = 40985 U gas Bise, Hoops, et al., 2000
To = 39950 U Ar B-X 210 251 Jacox, 1978
To = 39850 U N2 B-X 210 251 Jacox, 1978


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

Σ+ 1 Sym. stretch 1000 T gas PF 2000BIS/HOO4179
1 Sym. stretch 990 40 " Ar AB 1978JAC26
1 Sym. stretch 990 40 " N2 AB 1978JAC26
3 Asym. stretch 1455 " gas PF 2000BIS/HOO4179
3 Asym. stretch 1450 40 " Ar AB 1978JAC26
3 Asym. stretch 1450 40 " N2 AB 1978JAC26

State:   A


 Energy 
 (cm-1
 Med.   Transition   λmin 
 (nm) 
 λmax 
 (nm) 
 References

To = 23850 T gas A-X 395 420 Braun, Bass, et al., 1969
Curtis, Levick, et al., 1988
Bise, Hoops, et al., 2000
To = 23750 Ne A-X 397 420 Weltner and McLeod, 1966
To = 23830 Ne A-X 397 420 Weltner and McLeod, 1966
To = 23597 Ar A-X 401 424 Milligan, Jacox, et al., 1965
Milligan and Jacox, 1966
Bondybey and English, 1977
Wilkerson and Guillory, 1977
To = 23865 N2 A-X 396 419 Milligan, Jacox, et al., 1965
Milligan and Jacox, 1966


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

Σ+ 1 Sym. stretch 1386 " gas PF 2000BIS/HOO4179
1 Sym. stretch 1325 10 " Ne AB 1966WEL/MCL3096
1 Sym. stretch 1322 2 " Ar AB LF 1965MIL/JAC3149 1966MIL/JAC2850 1977
1 Sym. stretch 1335 10 " N2 AB 1965MIL/JAC3149 1966MIL/JAC2850
Π 2 Bend 525 ± 2 Ar LF Bondybey and English, 1977
Σ+ 3 Asym.stretch 1807 ±

State:   b


 Energy 
 (cm-1
 Med.   Transition   λmin 
 (nm) 
 λmax 
 (nm) 
 References

To = 10690 ± 120 gas Clifford, Wenthold, et al., 1998

State:   a


 Energy 
 (cm-1
 Med.   Transition   λmin 
 (nm) 
 λmax 
 (nm) 
 References

To = 6830 ± 120 gas Clifford, Wenthold, et al., 1998


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

Σ+ 3 Asym. stretch 1600 120 " gas PE 1998CLI/WEN7100

State:   X


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

Σ+ 1 Sym. stretch 1230 120 " gas PE 1998CLI/WEN7100
1 Sym. stretch 1235 " Ne EM 1966WEL/MCL3096
1 Sym. stretch 1235 " Ar LF 1977BON/ENG664 1992WUR/THO119
1 Sym. stretch 1241 N
1 Sym. stretch 1252 " N2 IR 1966MIL/JAC2850 1966MOL/THO2684 1971DEK/WEL7106
Π 2 Bend 390 ± 120 gas PE Clifford, Wenthold, et al., 1998
2 Bend 394 Ar LF Bondybey and English, 1977
2 Bend 393 Ar IR Milligan and Jacox, 1966
2 Bend 394 N2 IR Moll and Thompson, 1966
DeKock and Weltner, 1971
Σ+ 3 Asym. stretch 1425 120 " gas PE 1998CLI/WEN7100
3 Asym.stretch 1419 " Ar LF 1992WUR/THO119

Additional references: Jacox, 1994, page 71; Jacox, 2003, page 114; Wasserman, Barash, et al., 1965

Notes

UUpper bound
TTentative assignment or approximate value
oEnergy separation between the v = 0 levels of the excited and electronic ground states.
xEnergy separation between the band maximum of the excited electronic state and the v = 0 level of the ground state.

References

Go To: Top, Vibrational and/or electronic energy levels, Notes

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

Jacox, 1978
Jacox, M.E., Matrix isolation study of the reaction of carbon atoms with molecular nitrogen, J. Mol. Spectrosc., 1978, 72, 1, 26, https://doi.org/10.1016/0022-2852(78)90040-1 . [all data]

Bise, Hoops, et al., 2000
Bise, R.T.; Hoops, A.A.; Choi, H.; Neumark, D.M., Photodissociation dynamics of the CNN free radical, J. Chem. Phys., 2000, 113, 10, 4179, https://doi.org/10.1063/1.1288267 . [all data]

Braun, Bass, et al., 1969
Braun, W.; Bass, A.M.; Davis, D.D.; Simmons, J.D., Flash Photolysis of Carbon Suboxide: Absolute Rate Constants for Reactions of C(FormulaP) and C(Formula) with HFormula, NFormula, CO, NO, OFormula and CHFormula, Proc. Roy. Soc. (London) A312, 1969, 312, 1510, 417, https://doi.org/10.1098/rspa.1969.0168 . [all data]

Curtis, Levick, et al., 1988
Curtis, M.C.; Levick, A.P.; Sarre, P.J., Laser-Induced-Fluorescence Spectrum of the CNN Molecule, Laser Chem., 1988, 9, 4-6, 359, https://doi.org/10.1155/LC.9.359 . [all data]

Weltner and McLeod, 1966
Weltner, W., Jr.; McLeod, D., Jr., Spectroscopy of Carbon Vapor Condensed in Rare-Gas Matrices at 4°K. III, J. Chem. Phys., 1966, 45, 8, 3096, https://doi.org/10.1063/1.1728066 . [all data]

Milligan, Jacox, et al., 1965
Milligan, D.E.; Jacox, M.E.; Bass, A.M., Matrix Isolation Study of the Photolysis of Cyanogen Azide. The Infrared and Ultraviolet Spectra of the Free Radical NCN, J. Chem. Phys., 1965, 43, 9, 3149, https://doi.org/10.1063/1.1697289 . [all data]

Milligan and Jacox, 1966
Milligan, D.E.; Jacox, M.E., Matrix-Isolation Study of the Infrared and Ultraviolet Spectra of the Free Radical CNN, J. Chem. Phys., 1966, 44, 8, 2850, https://doi.org/10.1063/1.1727144 . [all data]

Bondybey and English, 1977
Bondybey, V.E.; English, J.H., Spectroscopy and vibrational relaxation of CNN in rare gas solids, J. Chem. Phys., 1977, 67, 2, 664, https://doi.org/10.1063/1.434869 . [all data]

Wilkerson and Guillory, 1977
Wilkerson, J.L.; Guillory, W.A., Laser-induced temporal and wavelength resolved spectroscopy of the 3Π-3Σ- system of matrix-isolated CNN, J. Mol. Spectrosc., 1977, 66, 2, 188, https://doi.org/10.1016/0022-2852(77)90209-0 . [all data]

Clifford, Wenthold, et al., 1998
Clifford, E.P.; Wenthold, P.G.; Lineberger, W.C.; Peterssom, G.A.; Broaddus, K.M.; Kass, S.R.; Kato, S., Properties of Diazocarbene [CNN] and the diazomethyl Radical [HCNN] via Ion Chemistry and Spectroscopy, J. Phys. Chem. A, 1998, 102, 36, 7100, https://doi.org/10.1021/jp9802735 . [all data]

Moll and Thompson, 1966
Moll, N.G.; Thompson, W.E., Reactions of Carbon Atoms with N2, H2, and D2 at 4.2°K, J. Chem. Phys., 1966, 44, 7, 2684, https://doi.org/10.1063/1.1727111 . [all data]

DeKock and Weltner, 1971
DeKock, R.L.; Weltner, W., Jr., C2O, CN2, and C3O molecules, J. Am. Chem. Soc., 1971, 93, 25, 7106, https://doi.org/10.1021/ja00754a081 . [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]

Jacox, 2003
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement B, J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629 . [all data]

Wasserman, Barash, et al., 1965
Wasserman, E.; Barash, L.; Yager, W.A., None, J. Am. Chem. Soc., 1965, 87, 9, 2075, https://doi.org/10.1021/ja01087a058 . [all data]


Notes

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