Cyanomethylene


Reaction thermochemistry data

Go To: Top, Gas phase ion energetics data, References, Notes

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

Data compiled by: John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

(CAS Reg. No. 74595-99-6 • 4294967295Cyanomethylene) + Cyanomethylene = CAS Reg. No. 74595-99-6

By formula: (CAS Reg. No. 74595-99-6 • 4294967295C2HN) + C2HN = CAS Reg. No. 74595-99-6

Quantity Value Units Method Reference Comment
Δr43.8 ± 6.7kcal/molN/APoutsma, Upshaw, et al., 2002gas phase
Δr43.7 ± 2.5kcal/molCIDTPoutsma, Upshaw, et al., 2002gas phase

Gas phase ion energetics data

Go To: Top, Reaction thermochemistry data, References, Notes

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

Data compiled by: John E. Bartmess

View reactions leading to C2HN+ (ion structure unspecified)

Electron affinity determinations

EA (eV) Method Reference Comment
2.003 ± 0.014LPESNimlos, Davico, et al., 2002 
1.883 ± 0.013LPESNimlos, Davico, et al., 2002 
2.01 ± 0.34D-EAMatimba, Crabbendam, et al., 1992 
1.93 ± 0.34D-EAGrabowski and Melly, 1987Between H2O2 and mCl-toluene
0.80 ± 0.40EIAEHeni and Illenberger, 1986From MeCN
>1.09997EIAETsuda, Yokohata, et al., 1971From MeCN. G3MP2B3 calculations indicate an EA of ca. 2.0 eV.

References

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Notes

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

Poutsma, Upshaw, et al., 2002
Poutsma, J.C.; Upshaw, S.D.; Squires, R.R.; Wenthold, P.G., Absolute heat of formation and singlet-triplet splitting for HCCN, J. Phys. Chem. A, 2002, 106, 6, 1067-1073, https://doi.org/10.1021/jp013653q . [all data]

Nimlos, Davico, et al., 2002
Nimlos, M.R.; Davico, G.; Geise, C.M.; Wenthold, P.G.; Lineberger, W.C.; Blanksby, S.J.; Hadad, C.M.; Petersso, Photoelectron spectroscopy of HCCN- and HCNC- reveals the quasilinear triplet carbenes, HCCN and HCNC, J. Chem. Phys., 2002, 117, 9, 4323-4339, https://doi.org/10.1063/1.1496473 . [all data]

Matimba, Crabbendam, et al., 1992
Matimba, H.E.K.; Crabbendam, A.M.; Ingemann, S.; Nibbering, N.M.M., Gas-phase Bimolecular Chemistry of the .-CHNC and .-CHCN Radical Anions, Int. J. Mass Spectrom. Ion Proc., 1992, 114, 1-2, 85, https://doi.org/10.1016/0168-1176(92)85024-T . [all data]

Grabowski and Melly, 1987
Grabowski, J.J.; Melly, S.J., Formation of carbene radical anions: Gas phase reaction of the atomic oxygen anion with organic neutrals, Int. J. Mass Spectrom. Ion Processes, 1987, 81, 147. [all data]

Heni and Illenberger, 1986
Heni, M.; Illenberger, E., Electron attachment by saturated nitriles. Acrylonitrile (CH2H3CN), and benzonitrile (C6H5CN), Int. J. Mass Spectrom. Ion Phys., 1986, 73, 127. [all data]

Tsuda, Yokohata, et al., 1971
Tsuda, S.; Yokohata, A.; Umaba, T., Measurement of negative ions formed by electron impact. VIII. Ionization efficiency curves of negative ions from methyl and ethyl cyanides, Bull. Chem. Soc. Jpn., 1971, 44, 1486. [all data]


Notes

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References