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NCN


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   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

To = 43530 ± 80 gas d-a 250 290 Kroto, Morgan, et al., 1970
Bise, Choi, et al., 1999


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

Sigmag+ 1 Sym. stretch 1020 T gas PF Bise, Choi, et al., 1999

State:   c


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

To = 38200 ± 80 gas c-a 330 334 Kroto, 1967
Bise, Choi, et al., 1999


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

Sigmag+ 1 Sym. stretch 1160 T gas AB Kroto, Morgan, et al., 1970

State:   B


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

To = 33488 gas B-X 258 300 Kroto, Morgan, et al., 1970
Bise, Choi, et al., 1999
To = 33100 Ar B-X 240 302 Milligan, Jacox, et al., 1965
To = 33215 N2 B-X 240 301 Milligan, Jacox, et al., 1965


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

Sigmag+ 1 Sym. stretch 1050 T gas AB PF Kroto, Morgan, et al., 1970
Bise, Choi, et al., 1999
1 Sym. stretch 1050 ± 10 Ar AB Milligan, Jacox, et al., 1965
1 Sym. stretch 1050 ± 10 N2 AB Milligan, Jacox, et al., 1965
Piu 2 Bend 540 ± 20 gas PF Bise, Choi, et al., 1999

State:   A


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

To = 30383.967 gas A-X 326 329 Herzberg and Travis, 1964
Beaton, Ito, et al., 1996
Beaton and Brown, 1997


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

Sigmag+ 1 Sym. stretch 1254 ± 5 gas LF Smith, Copeland, et al., 1989
Piu 2 Bend 534 T gas LF Beaton and Brown, 1997

State:   b


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

To = 13140 ± 80 gas Taylor, Bise, et al., 1999


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

Sigmag+ 1 Sym. stretch 1120 ± 50 gas PE Taylor, Bise, et al., 1999

State:   a


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

To = 8150 ± 80 gas c-a 330 334 Kroto, 1967
Taylor, Bise, et al., 1999

State:   X


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

Sigmag+ 1 Sym. stretch 1197 Ar IR Milligan and Jacox, 1966
Piu 2 Bend 437 T gas LF Beaton and Brown, 1997
2 Bend 423 m Ar IR Milligan, Jacox, et al., 1965
Milligan and Jacox, 1966
Sigmau+ 3 Asym. stretch 1466.51 gas IR LMR McNaughton, Metha, et al., 1995
Hensel and Brown, 1996
3 Asym. stretch 1466.7 Ne IR Jacox and Thompson, 2007
3 Asym. stretch 1475 vs Ar IR Milligan, Jacox, et al., 1965
Milligan and Jacox, 1966
Sigmag+ 3 Asym. stretch 1478 vs N2 IR Milligan, Jacox, et al., 1965
Moll and Thompson, 1966
Milligan and Jacox, 1966

Additional references: Jacox, 1994, page 70; Jacox, 1998, page 180; Jacox, 2003, page 113; Devillers and Ramsay, 1971

Notes

mMedium
vsVery strong
TTentative assignment or approximate value
oEnergy separation between the v = 0 levels of the excited and electronic ground states.

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.

Kroto, Morgan, et al., 1970
Kroto, H.W.; Morgan, T.F.; Sheena, H.H., Flash photolysis of cyanogen azide, NCN3, Trans. Faraday Soc., 1970, 66, 2237, https://doi.org/10.1039/tf9706602237 . [all data]

Bise, Choi, et al., 1999
Bise, R.T.; Choi, H.; Neumark, D.M., Photodissociation dynamics of the singlet and triplet states of the NCN radical, J. Chem. Phys., 1999, 111, 11, 4923, https://doi.org/10.1063/1.479751 . [all data]

Kroto, 1967
Kroto, H.W., THE, Can. J. Phys., 1967, 45, 4, 1439, https://doi.org/10.1139/p67-108 . [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]

Herzberg and Travis, 1964
Herzberg, G.; Travis, D.N., THE SPECTRUM AND STRUCTURE OF THE FREE NCN RADICAL, Can. J. Phys., 1964, 42, 8, 1658, https://doi.org/10.1139/p64-150 . [all data]

Beaton, Ito, et al., 1996
Beaton, S.A.; Ito, Y.; Brown, J.M., Laser Excitation Spectroscopy of theÃ3«PI»u--X3«SIGMA»-gTransition of the NCN Radical, J. Mol. Spectrosc., 1996, 178, 1, 99, https://doi.org/10.1006/jmsp.1996.0162 . [all data]

Beaton and Brown, 1997
Beaton, S.A.; Brown, J.M., Laser Excitation Spectroscopy of theÃ3«PI»u--3«SIGMA»g-Transition of the NCN Radical. 2. The «nu»2Hot Band, J. Mol. Spectrosc., 1997, 183, 2, 347, https://doi.org/10.1006/jmsp.1997.7286 . [all data]

Smith, Copeland, et al., 1989
Smith, G.P.; Copeland, R.A.; Crosley, D.R., Electronic quenching, fluorescence lifetime, and spectroscopy of the A 3«PI»u state of NCN, J. Chem. Phys., 1989, 91, 4, 1987, https://doi.org/10.1063/1.457057 . [all data]

Taylor, Bise, et al., 1999
Taylor, T.R.; Bise, R.T.; Asmis, K.R.; Neumark, D.M., The singlet--triplet splittings of NCN, Chem. Phys. Lett., 1999, 301, 3-4, 413, https://doi.org/10.1016/S0009-2614(99)00053-6 . [all data]

Milligan and Jacox, 1966
Milligan, D.E.; Jacox, M.E., Matrix-Isolation Study of the Photolysis of Cyanogen Azide. II. The Symmetric Stretching Fundamental of the Free Radical NCN, J. Chem. Phys., 1966, 45, 5, 1387, https://doi.org/10.1063/1.1727771 . [all data]

McNaughton, Metha, et al., 1995
McNaughton, D.; Metha, G.F.; Tay, R., Generation of transient species by laser induced pyrolysis. The high resolution fourier transform infrared spectrum of NCN, Chem. Phys., 1995, 198, 1-2, 107, https://doi.org/10.1016/0301-0104(95)00120-D . [all data]

Hensel and Brown, 1996
Hensel, K.D.; Brown, J.M., The «nu»3Band of the NCN Radical, Studied by LMR, J. Mol. Spectrosc., 1996, 180, 1, 170, https://doi.org/10.1006/jmsp.1996.0238 . [all data]

Jacox and Thompson, 2007
Jacox, M.E.; Thompson, W.E., Infrared spectroscopy and photochemistry of NCCN[sup +] and CNCN[sup +] trapped in solid neon, J. Chem. Phys., 2007, 126, 5, 054308, https://doi.org/10.1063/1.2433945 . [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]

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

Jacox, 1998
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement A, J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017 . [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]

Devillers and Ramsay, 1971
Devillers, C.; Ramsay, D.A., The Band System of the CCO Molecule, Can. J. Phys., 1971, 49, 22, 2839, https://doi.org/10.1139/p71-342 . [all data]


Notes

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