Anaiysis of Pmr Spectrurn of N,N'-ai-tert-butylthiourea (2) @. M. L. Kerr, K. Wabster, and F. Williams, J. Phys. Chem., 76, 2848 (1972) (3) I( a. Haase, D. Schulle-.Frohlinde, P. Kourim, and K. Vacek, lnt. J. Radiat. Phys Chem., 5, 351 (1973). (4) T. Feldman and A. Ireinin, J. Chem. Phys., 47, 2754 (1967). (5) F.S.Ezra and W. A. Bernhard, J. Chem. Phys., 59, 3543 (1973) (6) F. S. Ezra and W. A. Barnhard, J. Chem. Phys., in press. (7) W. A. Bernhard and F. S. Ezra, J. Chem. Phys., in press. (8) 8 . M . Brown and F , S . Dainton, Trans. Faraday SOC.,62, 1139 (1966). (9) L. Shields, Trans. FaradaySoc., 62, 1042 (1966). (10) R. W . Fesson8den,J.Phys. Chem., 71, 74 (1967). (11) R . Livingston J. I