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Part-IResults and DiscussionS. No. Y Mol. Formula(Sol. ofrecryst.)ClIIIxviiH C 20 H 13 ClN 4 OS 2(C-M)M.P ( o C) IR (cm -1 )(KBr)227-230 3279(γ NH ),1662(γ CONH ),743(γ C-S )Mass(m/e)424(M + ),391,363, 150NMR (δppm)(DMSO-d 6 )--IIIxviiiClSOCH 3 C 21 H 15 ClN 4 O 2 S 2(C-M)128-130 3194γ NH ),3090(γ C-H ),1680(γ CONH ),622(γ C-S )454(M + ),421,276, 1803.82 (3H, s, OCH 3 ), 4.38 (2H, s, CH 2 at SCH 2 ), 7.15 (1H, s, CH at6), 6.80 (1H, dd, CH at imidazole, J = 2.4 & 6.36), 7.00 (1H, d, CHat imidazole, J = 2.16), 7.40 (1H, d, CH at imidazole, J = 8.76),7.32-7.52 (4H, m, Ar-H)IIIxixSH C 21 H 16 N 4 OS 2(C-M)263-265 3243(γ NH ),2937(γ C-H ),1656(γ CONH ),740(γ C-S )404(M + ),371,343, 1502.20 (3H, s, CH 3 at 6), 4.52 (2H, s, CH 2 at CH 2 S), 7.10-7.60 (9H,m, Ar-H), 12.25 (1H, s, NH), 13.00 (1H, s, NH)IIIxxIIIxxiIIIxxiiIIIxxiiiSSSSSH C 17 H 14 N 4 OS 2(C-M)OCH 3 C 18 H 16 N 4 O 2 S 2(C-M)H C 19 H 18 N 4 OS 2(C-M)OCH 3 C 20 H 20 N 4 O 2 S 2(C-M)258-260 3247(γ NH ),2943(γ C-H ),1685(γ CONH ),741(γ C-S )162-165 3235(γ NH ),2992(γ C-H ),1668(γ CONH ),665(γ C-S )264-266 3212(γ NH ),2916(γ C-H ),1685(γ CONH ),737(γ C-S )226-230 3190(γ NH ),2918(γ C-H ),1685(γ CONH ),650(γ C-S )354(M + ),321,293,205,150384(M + ),351,205,180.382(M + ),349,232, 150412(M + ),379,232, 1802.45 (2H, m, CH 2 at 6), 2.94 (4H, m, CH 2 at 5 & 7), 4.40 (2H, s,CH 2 at SCH 2 ), 7.19 (2H, m, H at imidazole), 7.51 (2H, m, H atimidazole), 12.90 (1H, s, NH), 13.45 (1H, s, NH)--1.68 (6H, m, CH 2 at 6, 7, & 8), 1.88 (2H, t, CH 2 at 5, J = 3.36),3.30 (2H, t, CH 2 at 9, J = 5.36), 4.36 (2H, s, CH 2 at SCH 2 ), 7.20(2H, m, H at imidazole), 7.56 (2H, m, H at imidazole, J = 3.16),12.50 (1H, s, NH), 13.40 (1H, s, NH)1.66 (4H, m, CH 2 at 6 & 7), 1.87 (2H, m, CH 2 at 5), 2.85 (2H, m,CH 2 at 8), 3.29 (2H, m, CH 2 at 9), 3.84 (3H, s, CH 3 at OCH 3 ), 4.34(2H, s, SCH 2 ), 6.79-7.43 (3H, m, Ar-H), 12.30 (1H, s, NH), 13.21(1H, s, NH)89