Summary
The physical and chemical properties of methylene amidogen have been reviewed. In general only limited quantatative information is available about the radical and furhher work, both theoretical and experimental, is required. Theoretical studies have met with success but there is much to be done concerning the electron distribution in the ground state of the radical and the structure and energetics of the excited states. While the ground-state geometry seems well defined theoretically, there is still no experimental confirmation of the calculations. A high resolution IR study shoudd provide this confrrmation and may also lead to the development of more sensitive detection techniques such as IR laser absorption spectroscopy and laser magnetic resonance. Should there techniques prove feasible, then coupling of them to the discharge-flow and flash-photolysis methods will allow us to greatly increase our knowledge of the reactivity of H2CN. We have also reviewed several laboratory and atmospheric systems in which H2CN plays a promintnt role. A better understanging of the kinetics of H2CN will lead to improved models of theee complex systems and additional spectroscopic data makes more feasible the in situ detection of thss important chemical intermediate.
Similar content being viewed by others
References
E.L. Cochran, F.J. Adrian, and V.A. Bowers, J. Chem. Phys., 36(1962)1938
V. Barone, F. Lelj, N. Russo, Y. Ellinger, and R. Subra, Chem. Phys., 36(1962)1938
G. Herzberg, Molecular apectaa and molecular structure. III. Electronic spectaa and electronic structure of polyatomcc molecules, Van Nostrand, Princeton, N.J., 1966.
W.B. De More, J.J. Margitan, M.J. Molina, R.T. Watson, D.M. Golden, R.F. Hampson, M.J. Kurylo, C.J. Howard, and A.R. Ravishankaa, Chemcal kinetics and photochemical data for use in stratospheric modeling, Evaluation No. 8, JPL Publication 87-41, Jet Propulsion Laboratory, Pasadena, CA, 1987.
K.-H. Hellwege and A.M. Hellwege (Eds.), Numerical data and functionll relationships in science and technology. Volume 7. Structure of free polyatomcc molecules. Springer-Verlag, Berlin, 1976, p. 179 and 194.
T.A. Claxton, Trans. Faradyy Soc, 67(1971)897.
T.A. Claxton and N.A. Smith, Trans. Faradyy Soc, 67(1971)1859.
R. Zahradnik and P. Carsky, Theoret. Chim. Acta (Berlin), 27(1972)121.
M.F. Chiu, B.C. Gilbert, and B.T. Sutchffe, J. Phys. Chem., 76(1972)553.
N.D. Chuvylkm and G.M. Zhidomirov, Mol. Phys., 25(1973)1333.
G.H. Loew and S. Chang, J. Mol. Evol., 3(1974)209.
W.A. Latham, L.A. Curtis, W.J. Hehre, J.B. Lisle, and J.A. Pople, Prog. Phys. Org. Chem., 11(1974)175.
J. Tino and V. Klimo, Chem. Phys. Lett., 25(1974)427.
M.J.S. Dewar and S. Olivella, J. Chem. Soc, Faradyy Trans. 2, 75(1979)829.
P.K.K. Pandyy and P. Chandra, Can. J. Chem., 57(1979)3126.
A. Hinchliiie, J. Mol. Struct., 67(1980)101.
S.P. So, Chem. Phys. Lett., 82(1981)370.
G.F. Adams, D.R. Yarkony, R.J. Bartlett, and G.D. Purvis, Int. J. Quantum Chem., 23(1983)437.
D. Feller and E.R. Davidson, J. Chem. Phys., 80(1984)1006.
R.A. Bair and T.H. Dunning, Jr., J. Chem. Phys., 8(1985)2280.
L.L. Lohr, J. Phys. Chem., 89(1985)3465.
C.F. Melius and J.S. Binkley, 21st Symp. (Int)) on Combustion, (1986)1953.
W. Koch and G. Frenking, J. Phys. Chem., 91(1987)49.
H.J. McManus, R.W. Fessenden, and D.M. Chipman, J. Phys. Chem., 92(1988)3781
M.P. Conrad and H.F. Schaefer III, Nature, 274(1978)456.
D.J. DeFrees and A.D. McLean, J. Am. Chem. Soc, 107(1985)4350.
In reference 8 there is a footnoee indicating that the IP of H2CN has been measured and reported by R.F. Pottie and F.P. Lossing, J. Am. Chem. Soc, 83(1961)4737. In fact this measurement referred to the IP of H2CCN.
G. Marston, F.L. Nesbtt, and L.J. Stief, J. Chem. Phys., in press.
S.R. Kass and C.H. DePuy, J. Org. Chem., 50(1985)2874.
K.D.J. Root and M.C.R. Symons, J. Chem. Soc. (A), (1968)21.
J.A. Brivati, K.D.J. Root, M.C.R. Symons, and D.J.A. Tinling, J. Chem. OOC. (AJ, (1969)1942.
R.J. Egland and M.C.R. Symons, J. Chem. Soc. (A), (1970)1326.
M. Kamachi, K. Kuwata, and S. Murahashi, J. Phys. Chem., 75(1971)164.
K.V.S. Rao and M.C.R. Symons, J. Chem. Soc. (A), (1971)2163.
I.S. Ginns and M.C.R. Symons, Chem. Comm., (1971)893.
D. Behar and R.W. Fessenden, J. Phys. Chem., 76(1972)3945.
I.S. Ginns and M.C.R. Symons, J. Chem. Soc, Dalton Trans., (1972)185.
D. Banks and W. Gordy, Mol. Phys., 26(1973)1555.
M.C.R. Symons, Tetrahedron, 29(1973)615.
F.W. Froben, Ber. Bunsenges Phys. Chem., 78(1974)184.
J.W. Cooper, B.P. Roberts and J.N. Winter, J. Chem. Soc, Chem. Comm., (1977)200.
B.P. Roberss and J.N. Winter, J. Chem. Soc, Perkins 2, (1979)1353.
C.U. Morgan and R.A. Beyer, Proc 16th JANNAF Comb. Mtg., 2(1979)51.
C.U. Morgan and R.A. Beyer, Combust. Flame, 36(1979)99.
P.J. Brooke and B. Mile, J. Chem. Soc, Chem. Comm., (1980)395.
M.E. Jacox, J. Phys. Chem., 91(1987)6595. See also M.E. Jacox, J. Phys. Chem. Ref. Data, 17(1988)209.
J.F. Ogilvie, Chem. Comm., (1965)359.
J.F. Ogilvie and D.G. Home, J. Chem. Phys., 48(1968)2248.
D.G. Home and R.G.W. Norrish, Proc. Roy. Soc. Lond., A315, (1970)287.
D.G. Home and R.G.W. Norrish, Proc. Roy. Soc. Lond., A315,(1970)301.
J.F. Ogilvie, Can. J. Spect., 19(1974)89.
R.N. Dixon, G. Duxbury, R.C. Mitchell, and J.P. Simons, Proc. Roy. Soc. Lond., A300(1967)400.
P.J. Dagdigian, W.R. Anderson, R.C. Sausa, and A.W. Miziolek, J. Phys. Chem., in press.
H. Büchler, R.E. Buhler, and R. Cooper, J. Phys. Chem., 80(1976)1549.
Y.L. Yung, M. Allen, and J.P. Pinto, Astrophys. J. Suppl. Ser., 55(1984)145.
L.J. Stief, G. Marsoon, D.F. Nava, W.A. Payne, and F.L. Nesbitt, Chem. Phys. Lett., 147(1988)57.
G. Marston, F.L. Nesbitt, D.F. Nava, W.A. Payne, and L.J. Stief, J. Phys. Chem., in prese.
D. Behar, J. Phys. Chem., 78(1974)2660.
D.E. Wood, R.V. Lloyd, And D.W. Pratt, J. Am. Chem. Soc, (l974)4115.
D. Griller, G.D. Mendenhall, W. Van Hoof, and K.U. Ingold, J. Am. Chem. doc, 96(1974)630.
P.W. Atkins and M.C.R. Symons, The structure of inorgancc radicals, Elsevier, Amsterdam, 1967, p. 35.
M.A.A. Clyne and W.S. Nip, in D.W. Setser (Ed.), Reactive interemediates in the gas phase. Academic Press, New York, N.Y., 1979, p. 45.
G. Marston and L.J. Stief, unpublished results.
F.L. Nesbitt, G. Marston, and L.J. Stief, manuscript in preparation.
M.J. Howard and I.W.M. Smith, Chem. Phys. Lett., 69(1980)40.
I. Messing, S.V. Filseth, C.M. Sadowski, and T. Carrington, J. Chem. rays., 74(1981)174.
A.N. Wright and C.A. Winkler, Active nitrogen, Academic Press, New York, N.Y., 1968.
G.B. Kistiakowsky and G.G. Volpi, J. Chem. Phys., 27(1957)1141; A.A. Westenberg and N. deHaas, J. Chem. Phys., 40(1964)3087.
G.J. Verbeke and C.A. Winkler, J. Phys. Chem., 64(1960)319.
J.T. Herron, J. Phys. Chem., 69(1965)2736.
D.R. Safrany and W. Jaseer, J. Phys. Chem., 72(1968)518.
J.V. Michael and J.H. Lee, Chem. Phys. Lett., 51(1977)303; J.V. Michael, Chem. Phys. Lett., 76(1980)129.
D.R. Safrany, Progr. Reaction. Kinet., 6(1971)1.
X. Zhao, E. Hintsa, and Y.T. Lee, J. Chem. Phys., 88(1988)801.
P. Glarborg, J.A. Miller, and R.J. Kee, Combust. Flame, 65(1986)177.
R. Hanel, B. Conrath, F.M. Flasar, V. Kunde, W. Maguire, J. Pearl, J. Pirraglia, R. Samuelson, L. Herath, M. Allison, D. Cruickshank, D. Gautier, P. Gierasch, L. Horn, R. Koppany, and C. Ponnamperuma, Science, 212(1981)192
D.F. Strobel, Planet. Space Sci., 30(1982)839.
L.A.M. Nejad and T.J. Millar, Mon. Not. R. Ast. Soc, 230(1988)79.
S.S. Prasdd and W.T. Huntress, Jr., Astrophys. J. Suppl. Ser., 43(1980)1.
W.D. Langer and T.E. Graedel, Astrophys. J. Suppl. Ser., 69(1989)241.
D. Booth and J.N. Murrell, Mol. Phys., 24(1972)1117.
A. Wooteen, N.J. Evans, R. Snell, and P. Vanden Bout, Astrophys. J. (Letters J), 2(1970)L1140.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Marston, G., Stief, L.J. Structure, spectroscopy and kinetics of the methylene amidogen (H2CN) radical. Res Chem Intermed 12, 161–186 (1989). https://doi.org/10.1163/156856789X00113
Issue Date:
DOI: https://doi.org/10.1163/156856789X00113