Methanimine

Formula: CH₃N
Molecular weight: 29.0412
IUPAC Standard InChI: InChI=1S/CH3N/c1-2/h2H,1H2
IUPAC Standard InChIKey: WDWDWGRYHDPSDS-UHFFFAOYSA-N
CAS Registry Number: 2053-29-4
Chemical structure:
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Vibrational and/or electronic energy levels

State: ?

Energy (cm^-1)	Med.	References


T_x = 40000	gas	Teslja, Nizamov, et al., 2004

State: X

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


a'	1	NH stretch	3262.62		gas	IR	Hamada, Hashiguchi, et al., 1984 Halonen and Duxbury, 1985
	2	CH stretch	3024.45		gas	IR	Halonen and Duxbury, 1985, 2
	2	CH stretch	3036	w m	Ar	IR	Milligan, 1961 Jacox and Milligan, 1975
	3	CH stretch	2914.18		gas	IR	Hamada, Hashiguchi, et al., 1984 Halonen and Duxbury, 1985, 2
	3	CH stretch	2926	m	Ar	IR	Milligan, 1961 Jacox and Milligan, 1975
	4	C=N stretch	1638.30		gas	LS IR	Allegrini, Johns, et al., 1979 Duxbury, Kato, et al., 1981 Hamada, Hashiguchi, et al., 1984
	4	C=N stretch	1641	s	Ar	IR	Milligan, 1961 Jacox and Milligan, 1975
	5	CH₂ scissors	1452.04		gas	IR	Duxbury, Kato, et al., 1981 Duxbury and Le Lerre, 1982 Hamada, Hashiguchi, et al., 1984
	5	CH₂ scissors	1453	s	Ar	IR	Milligan, 1961 Jacox and Milligan, 1975
	6	HCNH deform.	1344.27		gas	IR	Duxbury, Kato, et al., 1981 Duxbury and Le Lerre, 1982 Hamada, Hashiguchi, et al., 1984
	6	HCNH deform.	1348	vs	Ar	IR	Milligan, 1961 Jacox and Milligan, 1975
	7	HCNH deform.	1058.18		gas	IR	Hamada, Hashiguchi, et al., 1984 Halonen and Duxbury, 1985, 3 Halonen, Deeley, et al., 1986
	7	HCNH deform.	1059	s	Ar	IR	Milligan, 1961 Jacox and Milligan, 1975
a	8	Torsion	1126.99		gas	IR	Hamada, Hashiguchi, et al., 1984 Duxbury and Le Lerre, 1984 Halonen and Duxbury, 1985, 3 Halonen, Deeley, et al., 1986
	8	Torsion	1123	vs	Ar	IR	Milligan, 1961 Jacox and Milligan, 1975
	9	H₂CN OPLA	1060.76		gas	IR	Hamada, Hashiguchi, et al., 1984 Halonen and Duxbury, 1985, 3 Halonen, Deeley, et al., 1986
	9	H₂CN OPLA	1063	m	Ar	IR	Milligan, 1961 Jacox and Milligan, 1975

Additional references: Jacox, 1994, page 234; Milligan and Jacox, 1963; Johnson and Lovas, 1972; Kirchhoff, Johnson, et al., 1973; Pearson and Lovas, 1977; Margules, Demaison, et al., 2006

Notes

Weak

Medium

Strong

Very strong

Energy 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

Teslja, Nizamov, et al., 2004
Teslja, A.; Nizamov, B.; Dagdigian, P.J., The Electronic Spectrum of Methyleneimine, J. Phys. Chem. A, 2004, 108, 20, 4433, https://doi.org/10.1021/jp037938+ . [all data]

Hamada, Hashiguchi, et al., 1984
Hamada, Y.; Hashiguchi, K.; Tsuboi, M.; Koga, Y.; Kondo, S., Pyrolysis of amines: Infrared spectrum of methyleneimine, J. Mol. Spectrosc., 1984, 105, 1, 70, https://doi.org/10.1016/0022-2852(84)90104-8 . [all data]

Halonen and Duxbury, 1985
Halonen, L.; Duxbury, G., Fourier transform infrared spectrum of CH2NH: The ν1 band, Chem. Phys. Lett., 1985, 118, 3, 246, https://doi.org/10.1016/0009-2614(85)85309-4 . [all data]

Halonen and Duxbury, 1985, 2
Halonen, L.; Duxbury, G., High resolution infrared spectrum of methyleneimine, CH2NH,in the 3 μm region, J. Chem. Phys., 1985, 83, 5, 2091, https://doi.org/10.1063/1.449351 . [all data]

Milligan, 1961
Milligan, D.E., Infrared Spectroscopic Study of the Photolysis of Methyl Azide and Methyl-d3 Azide in Solid Argon and Carbon Dioxide, J. Chem. Phys., 1961, 35, 4, 1491, https://doi.org/10.1063/1.1732070 . [all data]

Jacox and Milligan, 1975
Jacox, M.E.; Milligan, D.E., The infrared spectrum of methylenimine, J. Mol. Spectrosc., 1975, 56, 3, 333, https://doi.org/10.1016/0022-2852(75)90122-8 . [all data]

Allegrini, Johns, et al., 1979
Allegrini, M.; Johns, J.W.C.; McKellar, A.R.W., Laser Stark spectroscopy of the ν4 fundamental band of CH2NH at 6.1 μm, J. Chem. Phys., 1979, 70, 6, 2829, https://doi.org/10.1063/1.437815 . [all data]

Duxbury, Kato, et al., 1981
Duxbury, G.; Kato, H.; Le Lerre, M.L., Laser Stark and interferometric studies of thioformaldehyde and methyleneimine, Discuss. Faraday Soc., 1981, 71, 97, https://doi.org/10.1039/dc9817100097 . [all data]

Duxbury and Le Lerre, 1982
Duxbury, G.; Le Lerre, M.L., Fourier transform infrared spectra of CH2NH: The ν5 and ν6 bands, J. Mol. Spectrosc., 1982, 92, 2, 326, https://doi.org/10.1016/0022-2852(82)90106-0 . [all data]

Halonen and Duxbury, 1985, 3
Halonen, L.; Duxbury, G., The Fourier transform infrared spectrum of methyleneimine in the 10 μm region, J. Chem. Phys., 1985, 83, 5, 2078, https://doi.org/10.1063/1.449350 . [all data]

Halonen, Deeley, et al., 1986
Halonen, L.; Deeley, C.M.; Mills, I.M., Intensities in the ν7, ν8, and ν9 bands of CH2NH and the harmonic force field of methyleneimine, J. Chem. Phys., 1986, 85, 2, 692, https://doi.org/10.1063/1.451274 . [all data]

Duxbury and Le Lerre, 1984
Duxbury, G.; Le Lerre, M.L., High-resolution IR spectra of methyleneimine (CH2NH) in the 10 μm region, the ν8 band, Infrared Phys., 1984, 24, 2-3, 261, https://doi.org/10.1016/0020-0891(84)90080-0 . [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]

Milligan and Jacox, 1963
Milligan, D.E.; Jacox, M.E., Infrared Spectroscopic Evidence for the Species HNC, J. Chem. Phys., 1963, 39, 3, 712, https://doi.org/10.1063/1.1734312 . [all data]

Johnson and Lovas, 1972
Johnson, D.R.; Lovas, F.J., Microwave detection of the molecular transient methyleneimine (CH2=NH), Chem. Phys. Lett., 1972, 15, 1, 65, https://doi.org/10.1016/0009-2614(72)87017-9 . [all data]

Kirchhoff, Johnson, et al., 1973
Kirchhoff, W.H.; Johnson, D.R.; Lovas, F.J., Microwave Spectra of Molecules of Astrophysical Interest: II Methylenimine, J. Phys. Chem. Ref. Data, 1973, 2, 1, 1, https://doi.org/10.1063/1.3253110 . [all data]

Pearson and Lovas, 1977
Pearson, R., Jr.; Lovas, F.J., Microwave spectrum and molecular structure of methylenimine (CH2NH), J. Chem. Phys., 1977, 66, 9, 4149, https://doi.org/10.1063/1.434490 . [all data]

Margules, Demaison, et al., 2006
Margules, L.; Demaison, J.; Streeja, P.B.; Guillemin, J.-C., Submillimeterwave spectrum of CH2PH and equilibrium structures of CH2PH and CH2NH, J. Mol. Spectrosc., 2006, 238, 2, 234, https://doi.org/10.1016/j.jms.2006.05.008 . [all data]

Notes

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

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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