References

 

• Adams, F. C., & Lin, D. N. C. 1993, in Protostars and Planets III, ed. E. H. Levy, & J. I. Lunine (Tucson: Univ. of Arizona Press), 721  
• Aikawa, Y., & Herbst, E. 1999a, A&A, 351, 233 (Paper I) NASA ADS  
• Aikawa, Y., & Herbst, E. 1999b, ApJ, 526, 314 NASA ADS  
• Aikawa, Y., Umebayashi, T., Nakano, T., & Miyama, S. M., 1997, ApJ, 486, L51 NASA ADS  
• Aikawa, Y., Umebayashi, T., Nakano, T., & Miyama, S. M. 1999, ApJ, 519, 705 NASA ADS  
• Anders, E., & Grevesse, N. 1989, Geochimica et Cosmochimica Acta, 53, 197 NASA ADS  
• Beckwith, S. V. W., Sargent, A. I., Chini, R. S., & Güsten, R. 1990, AJ, 99, 924 NASA ADS  
• Brown, P. D., & Millar, T. J. 1989, MNRAS, 237, 661 NASA ADS  
• Cameron, A. G. W. 1973, Space Sci. Rev., 15, 121 NASA ADS  
• Caselli, P., Walmsley, C. M., Terzieva, R., & Herbst, E. 1998, ApJ, 499, 234 NASA ADS  
• Dutrey, A., Guilloteau, S., & Gu $\acute{\rm e}$lin, M. 1997, A&A, 317, L55 NASA ADS  
• Dutrey, A., Guilloteau, S., & Simon, M. 1994, A&A, 286, 149 NASA ADS  
• Glassgold, A. E., Najita, J., & Igea, J. 1997, ApJ, 480, 344 NASA ADS  
• Gredel, R., Lepp, S., & Dalgarno, A. 1987, ApJ, 323, L137 NASA ADS  
• Gredel, R., Lepp, S., Dalgarno, A., & Herbst, E. 1989, ApJ, 347, 289 NASA ADS  
• Gu $\acute{\rm e}$lin, M., Langer, W. D., & Wilson, R. W. 1982, A&A, 107, 10  
• Guilloteau, S., & Dutrey, A. 1998, A&A, 339, 467 NASA ADS  
• Handa, T., Miyama, S. M., Yamashita, T., et al. 1995, ApJ, 449, 894 NASA ADS  
• Hayashi, C. 1981, Prog. Theor. Phys. Suppl., 70, 35 NASA ADS  
• Henchman, M. J., Paulson, J. F., Smith, D., Adams, N. G., & Lindinger, W. 1988, in Rate Coefficients in Astrochemistry, ed. T. J. Millar,
  & D. A. Williams (Dordrecht: Kluwer), 201  
• Herbig, G. H., & Goodrich, R. W. 1986, ApJ, 309, 294 NASA ADS  
• Imhoff, C. L., & Appenzeller, I. 1987, in Scientific Accomplishments of the I. U. E., ed. Y. Kondo (Dordrecht: Reidel), 295  
• Kawabe, R., Ishiguro, M., Omodaka, T., Kitamura, Y., & Miyama, S. M. 1993, ApJ, 404, L63 NASA ADS  
• Koerner, D. W., & Sargent, A. I. 1995, AJ, 109, 2138 NASA ADS  
• Koerner, D. W., Sargent, A. I., & Beckwith, S. V. W. 1993, Icarus, 106, 2 NASA ADS  
• Lee, H.-H., Herbst, E., Pineau des Forêts, G., Roueff, E., & Le Bourlot, J. 1996, A&A, 311, 690 NASA ADS  
• Lee, H.-H., Roueff, E., Pineau des Forêts, G., et al. 1998, A&A, 334, 1047 NASA ADS  
• Lennon, M. A., Bell, K. L., Gilbody, H. B., et al. 1988, J. Phys. Chem. Ref. Data, 17, 1285 NASA ADS  
• Maloney, P., Hollenbach, D. J., & Tielens, A. G. G. M. 1996, ApJ, 466, 561 NASA ADS  
• Millar, T. J., Bennett, A., & Herbst, E. 1989, ApJ, 340, 906 NASA ADS  
• Millar, T. J., Farquhar, P. R. A., & Willacy, K. 1997, A&AS, 121, 139 NASA ADS  
• Montmerle, T., Feigelson, E. D., Bouvier, J., & Andr $\acute{\rm e}$, P. 1993, in Protostars and Planets III, ed. E. H. Levy, & J. I. Lunine (Tucson: Univ. of Arizona Press), 689  
• Nesbitt, F. L., Marston, G., & Stief, L. J. 1990, J. Phys. Chem., 94, 4946  
• Osamura, Y., Fukuzawa, K., Terzieva, R., & Herbst, E. 1999, ApJ, 519, 697 NASA ADS  
• Qi, C. 2000, Ph.D. Thesis, California Institute of Technology  
• Qi, C., Blake, G. A., & Sargent, A. I. 1999, in Science with the Atacama Large Millimeter Array (ALMA), a meeting held October 6-8, 1999 at Carnegie
  Institution of Washington  
• Ruffle, D. P., Hartquist, T. W., Taylor, S. D., & Williams, D. A. 1997, MNRAS, 291, 235 NASA ADS  
• Saito, M., Kawabe, R., Ishiguru, M., et al. 1995, ApJ, 453, 384 NASA ADS  
• Scott, G. B. I., Fairley, D. A., Freeman, C. G., McEwan, M. J., & Anicich, V. G. 1998, J. Chem. Phys., 109, 9010 NASA ADS  
• Terzieva, R., & Herbst, E. 1998, ApJ, 501, 207 NASA ADS  
• van der Tak, F. F. S., & van Dishoeck, E. F. 2000, A&A, 358, L79 NASA ADS  
• van Dishoeck, E. F., & Black, J. H. 1988, ApJ, 334, 771 NASA ADS  
• Verner, D. A., Yakovlev, D. G., Band, I. M., & Trzhaskovskaya, M. B. 1993, At. Data Nucl. Data Tables, 55, 233 NASA ADS  
• Willacy, K., & Langer, W. D. 2000, ApJ, 544, 903 NASA ADS