N,N'-Di-(p-chlorophenethyl)thiourea (entry 10). White crystal; m.p. 119oC, (lit.8 119-120oC); IR 3261, 3220, 3058, 2933, 1895, 1596, 1560, 1488, 1097 cm-1; 1H NMR [CDCl3 + d6-DMSO (1:1)] d 6.62-6.44 (m, 8H), 3.03-3.02 (m, 4H), 2.18 (t, J = 7.1 Hz, 4H); 13C NMR d 188.1, 143.5 (2C), 136.7 (2C), 135.7 (4C), 133.7 (4C), 50.2 (2C), 39.9 (2C).
N,N'-Di-(R)-1-phenylethyl)thiourea (entry 11). White crystal; m.p. 199oc, (lit.9 200oC); IR 3205, 3120, 3008, 1598, 1548, 1494, 1344 cm-1; 1H NMR [CDCl3 + d6-DMSO (1:2)] d 7.70 (s, 2H), 7.31-7.20 (m, 10H), 5.43 (m, 2H), 1.41 (d, J = 6.9 Hz, 6H); 13C NMR d 181.7, 145.1 (2), 129.1 (4C), 127.5 (2C), 126.9 (4C), 53.1 (2C), 23.3 (2C).
N,N'-Bispentamethylenethiourea (entry 12). Yellowish crystal; m.p. 59oC, (lit.10 59-60oC); IR 2933, 2852, 1583, 1461, 1409, 1218 cm-1; 1H NMR [CDCl3] d 4.37 (t, J = 5.4 Hz, 4H), 3.31 (t, J = 4.8 Hz, 4H), 1.94-1.65 (m, 12H); 13C NMR d 208.9, 52.4 (2C), 45.6 (2C), 26.6 (2C), 24.9 (2C), 23.3 (2C).
Acknowledgements
This investigation had enjoyed financial support from CSIR [Grant No. 01(1739)/02]. S.S.D. is also thankful to CSIR for his fellowship. Mr. A. Middya is thanked for his help in a few initial experiments.
References
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