Identification of the 1,3,2,4-Dithiadiazolyl RCNSNS. Radical Dimers in Solution, Their Dimeric Concerted Photochemically Symmetry-Allowed Rearrangement to 1,2,3,5-Dithiadiazolyl RCNSSN. by the Net Exchange of Adjacent Cyclic Sulfur and Nitrogen Atoms, and the Photolysis of RCNSNS.

Inorganic Chemistry

Volumn 35, Issue 5, 1996, Pages 1313-1320

  Passmore, Jack ^a   Sun, Xiaoping ^a  

^a UNIVERSITY OF NEW BRUNSWICK   (Canada)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0001170128     PISSN: 00201669     EISSN: None     Source Type: Journal    
DOI: 10.1021/ic9509140     Document Type: Article

References (53)

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24. 2, which is directly proportional to the concentration of a radical species. Here h stands for the peak height (arbitrary unit) and ΔH the "peak-peak" width (in gauss). See: Wertz, J. E., Bolton, J. R Electron Spin Resonance Elementary Theory and Practical Applications: McGraw-Hiil Inc.: New York, 1972; pp 32-36, Poole, C. P., Jr. Electron Spin Resonance: A Comprehensive Treatise on Experimental Techniques, John Wiley and Sons Inc.: New York, 1983; pp 466-477.
25. 2, which is directly proportional to the concentration of a radical species. Here h stands for the peak height (arbitrary unit) and ΔH the "peak-peak" width (in gauss). See: Wertz, J. E., Bolton, J. R Electron Spin Resonance Elementary Theory and Practical Applications: McGraw-Hiil Inc.: New York, 1972; pp 32-36, Poole, C. P., Jr. Electron Spin Resonance: A Comprehensive Treatise on Experimental Techniques, John Wiley and Sons Inc.: New York, 1983; pp 466-477.
26. (a) The percentage of dimerization (ca. 4%) was obtained by using the estimated equilibrium constant (0.72) at 298 K (see below),
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32. (a) Awere, E. G.; Burford, N., Mailer, C.; Passmore, J., Sehriver, M. J., White, P. S , Banister, A J , Oberhammer, H ; Sucliffe, L. H. J. Chem. Soc., Chem. Commmun. 1987, 66. Schriver, M. Ph.D. Thesis. University of New Brunswick. 1988.
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37. .. See: Schriver, M. J. Ph.D. Thesis. University of New Brunswick, 1988. Passmore, J.; Schriver, M. J Manuscript in preparation.
38. .. See: Schriver, M. J. Ph.D. Thesis. University of New Brunswick, 1988. Passmore, J.; Schriver, M. J Manuscript in preparation.
39. 2 solution.
40. 2 in solution is simply proportional to its absorbance at a given wavelength,
41. (b) Fairhurst, S. A.; Sutcliffe, L. H., Preston, K. F.; Banister, A. J.; Partington, A S ; Rawson, J. M.; Passmore, J.; Schriver, M. J. Magn. Reson. Chem. 1993m 31, 1027.
42. . monomer (eq 1) at a given concentration in a dilute solution can be estimated by using the observed equilibrium constant (0.72). The extinction coefficients of several bands for the dimer absorptions were then estimated according to Beer's law.
43. Wentrup, C.; Kambouris, P. Chem Rev. 1991, 91, 363. Wentrup, C.; Fischer, S., Maquestiau, A., Flammang, R. J Org Chem. 1986, 51, 1908.
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45. ., etc. See: Hassanzadeh, P.; Andrews, L. J. Am. Chem Soc. 1992. 114, 83
46. Woodward, R. B.; Hoffmann, R. The Conservation of Orbital Symmetry; Academic Press: New York, 1970.
47. Sn (kJ/mol). See: Parsons, S.; Passmore, J. Inorg. Chem. 1992, 31, 526. The S-N bond distances are as described in the Experimental Section for MO calculations.
48. Sn (kJ/mol). See: Parsons, S.; Passmore, J. Inorg. Chem. 1992, 31, 526. The S-N bond distances are as described in the Experimental Section for MO calculations.
49. Amano, T.; Amano, T. Abstracts of Papers. 44th Symposium on Molecular Spectroscopy. June 12-16, 1989, Columbus, OH; Abstract RF1.
50. . (electropositive derivative), the rearrangement in dilute solution (0.02 M) did not occur in the dark at room temperature.
51. . was characterized by elemental analysis and ESR (1:2:3:2:1 pentet): Burford, N.; Passmore, J., Sun, X. Unpublished results.
52. 2 under UV irradiation (maximum absorption 250 nm).
53. Burford, N.; Passmore, J. Unpublished results.