C(CN)2

Formula: C₃N₂
Molecular weight: 64.0455
CAS Registry Number: 1884-65-7
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Vibrational and/or electronic energy levels

State: B

Energy (cm^-1)	Med.	λ_min (nm)	λ_max (nm)	References


T_o = 37310	Ar	240	270	Dunkin and McCluskey, 1994
				Maier, Reisenauer, et al.

State: A

Energy (cm^-1)	Med.	λ_min (nm)	λ_max (nm)	References


T_o = 27850	Ar	280	360	Dunkin and McCluskey, 1994
				Maier, Reisenauer, et al.

State: X

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


Σ_g	1	CN s-stretch	1945	T	Ar	IR	Maier, Reisenauer, et al.
	2	C₃ s-stretch	689	T	Ar	IR	Maier, Reisenauer, et al.
Σ_u	3	CN a-stretch	1747.6	vs	Ar	IR	Smith and Leroi, 1969 Dunkin and McCluskey, 1994 Maier, Reisenauer, et al.
	4	C₃ a-stretch	1508.1	w	Ar	IR	Maier, Reisenauer, et al.
Π_g	5	Deformation	373	T	Ar	IR	Maier, Reisenauer, et al.
Π_u	6	Deformation	387.2	w m	Ar	IR	Smith and Leroi, 1969 Maier, Reisenauer, et al.
	7	Deformation	102	T	Ar	IR	Maier, Reisenauer, et al.

Additional references: Jacox, 1994, page 278; Jacox, 1998, page 295

Notes

Weak

Medium

Very strong

Tentative assignment or approximate value

Energy separation between the v = 0 levels of the excited and electronic ground states.

References

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Dunkin and McCluskey, 1994
Dunkin, I.R.; McCluskey, A., Spectrochim. Acta, 1994, 50A, 209. [all data]

Maier, Reisenauer, et al.
Maier, G.; Reisenauer, H.P.; Ruppel, R., J. Org. Chem. 2003, 2695.. [all data]

Smith and Leroi, 1969
Smith, W.H.; Leroi, G.E., Spectrochim. Acta, 1969, 25A, 1917. [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]

Notes

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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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