National Institute of Standards and Technology

NIST Chemistry WebBook, SRD 69

WCD

Formula: CDW
Molecular weight: 197.86
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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: C

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


T_o = 14079.8		gas	C-X	652	710	Barnes, Gillett, et al., 1996

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


Π	2	Bend	576		gas	LF	Barnes, Gillett, et al., 1996
Σ⁺	3	WC stretch	670	T	gas	LF	Barnes, Gillett, et al., 1996

State: B

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


T_o = 13416.4		gas	B-X	680	746	Barnes, Gillett, et al., 1996

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


Π	2	Bend	450		gas	LF	Barnes, Gillett, et al., 1996
Σ⁺	3	WC stretch	809		gas	LF	Barnes, Gillett, et al., 1996

State: A

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


T_o = 12122.4		gas	A-X	749	825	Barnes, Gillett, et al., 1996

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


Π	2	Bend	376		gas	LF	Barnes, Gillett, et al., 1996
Σ⁺	3	WC stretch	896		gas	LF	Barnes, Gillett, et al., 1996

State: a

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


T_o = 834		gas				Barnes, Gillett, et al., 1996

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


Π	2	Bend	451 ± 5		gas	LF	Barnes, Gillett, et al., 1996
Σ⁺	3	WC stretch	930 ± 5		gas	LF	Barnes, Gillett, et al., 1996

State: X

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


Π	2	Bend	501 ± 5		gas	LF	Barnes, Gillett, et al., 1996
Σ⁺	3	WC stretch	953 ± 5		gas	LF	Barnes, Gillett, et al., 1996

Notes

Tentative assignment or approximate value

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

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.

Barnes, Gillett, et al., 1996
Barnes, M.; Gillett, D.A.; Merer, A.J.; Metha, G.F., The near infrared electronic spectrum of tungsten methylidyne, WCH, J. Chem. Phys., 1996, 105, 15, 6168, https://doi.org/10.1063/1.472502 . [all data]

Notes

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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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