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Table 39: Physical data of condensed 4-chloro 2-substitutedpyrimidines synthesized using MWI irradiation (VIi-xxii)ClPart-IIResults and DiscussionNNRS. No. R Time ofMWIHeating(Min)VIiYield(%)M.P.Mol. formula(Solv. of crystn.)IR (cm -1 )(KBr)-CH 2 Cl 4 90 85-87 C 14 H 10 Cl 2 N 2 S 2979(γ C-H ),1458(γ),722(γ C-Cl )Mass (m/e)NMR (δppm)(CDCl 3 )-- 2.42 (3H, s, CH 3 ), 4.82(2H, s, CH 2 Cl), 7.25-7.51 (5H, m, Ar-H andH at 6)VIiiVIiiiSS-CH 2 Cl 5 92 116-118 C 9 H 8 Cl 2 N 2 S 2980(γ C-H ),677(γ C-Cl )-CH 2 Cl 4 77 68-70 C 13 H 8 Cl 2 N 2 S 2932(γ C-H ),1510(γ C-C )-- 2.45 (3H, s, CH 3 ), 2.50(3H, s, CH 3 ), 4.82 (2H,s, CH 2 Cl)-- 4.82 (2H, s, CH 2 Cl),7.25-7.62 (4H, m, Ar-H and 1H at 6)SVIivOOS-CH 2 Cl 6 75 135-137 C 11 H 10 Cl 2 N 2 O 2 S 1718(γ C=O ),1534(γ C-C ),762(γ C-Cl )305(M + ),289, 276,259, 241,232, 244,1971.43 (3H, t, CH 2 CH 3 , J= 7.2 & 6.9), 3.06 (3H,s, CH 3 ), 4.42 (2H, q,CH 2 CH 3 , J = 6.9 &7.2), 4.78 (2H, s,CH 2 Cl)334