NUCLEOSIDES, NUCLEOTIDES AND NUCLEIC ACIDS
9
Analytical data of complex [pt(L1)Cl2] (I, C17H14Cl4N4PtS)
Yield: 91%; Colour: brown powder; mol. wt.: 641.26 g/mol; M.p.: >300 ꢂC;
1H NMR (400 MHz, DMSO-d6): d ¼ 10.460 (1H, s, N–H), 7.560–6.816 (7H,
m, Ar-H3’,4’,2”’,6”’,3”’,5”’,4”’), 5.378 (1H, dd, 3J1 ¼ 8.0 Hz, 3J2 ¼ 7.2 Hz, H5),
3
3
3
3.783 (1H, dd, J1 ¼ 12.8 Hz, J2 ¼ 11.2 Hz, Hb), 3.193 (1H, dd, J1 ¼ 7.6 Hz,
3J2 ¼ 7.2 Hz, Ha), 2.191 (3H, s, pyrazole-CH3) ppm; 13C NMR (100 MHz,
DMSO-d6): d ¼ 152.83 (C3, Cquat.), 147.15 (C3”, Cquat.), 139.80 (C3’, –CH),
147.57 (C5’, Cquat.), 137.24 (C1”’, Cquat.), 133.74 (C4’, –CH), 129.37 (C3”’,5”’,
–CH), 129.00 (C5”, Cquat.), 126.25 (C4”’, –CH), 124.85 (C2”’,6”’, –CH), 116.00
(C2’, Cquat.), 54.00 (C5, –CH), 43.02 (C4, –CH2), 119.00 (C4”, Cquat.), 12.29
(–CH3, pyrazole) ppm [Total signal observed ¼15: signal of C and CH2 ¼ 8
(thiophene-C ¼ 2, pyrazole-C ¼ 4, phenyl ring-C ¼ 1, pyrazole–CH2 ¼ 1),
signal of CH and CH3 ¼ 7 (thiophene-CH ¼2, pyarazole-CH ¼1, phenyl
ꢀ
ring-CH ¼3, pyrazole-CH3 ¼ 1]; IR (KBr): V ¼ 3078 m(¼C–H)ar (w),
1627–1674 m(C ¼ N) (s), 1527–1481 m(C ¼ C)conjugated alkenes (m), 1411–1380
m(C–H)banding (m), 3404 m(N–H), 1296 m(C-N), 1257 m(C–C)alkanes (s), 1018
m(C-S-C)stre.(thiophene
(w), 616 m(N-Pt) (w), 555 m(S-Pt) (s) cmꢁ1;
ring)
UV–Vis (DMSO, c ¼ 10ꢁ4 mol dmꢁ3): kmax (e) ¼ 266 (37,750), 288
(36,540), 359 (15,940) nm (molꢁ1 dm3 cmꢁ1); MS (70 eV): m/z ¼ 641.38
(M)þ, 643.62 (M þ 2), 645.35 (M þ 4), 647.82 (M þ 6), 649.03 (M þ 8);
Anal. Calc. (%) For C17H14Cl4N4PtS: C, 31.74; H, 2.19; N, 8.71; Pt, 30.33;
S, 4.98. Found (%): C, 31.70; H, 2.30; N, 8.67; Pt, 30.28; S, 4.89; Molar con-
ductance: 20 Xꢁ1 cm2 molꢁ1.
Analytical data of complex [pt(L2)Cl2] (II, C17H14BrCl3N4PtS)
Yield: 80%; Colour: brown powder; mol. wt.: 687.73 g/mol; M.p.: >300 ꢂC;
1H NMR (400 MHz, DMSO-d6): d ¼ 10.650 (1H, s, N–H), 8.050–7.079 (7H,
m, Ar-H3’,4’,2”’,6”’,3”’,5”’,4”’), 5.791 (1H, dd, 3J1 ¼ 5.2 Hz, 3J2 ¼ 4.8 Hz, H5),
3
3
3
3.818 (1H, dd, J1 ¼ 12.0 Hz, J2 ¼ 11.6 Hz, Hb), 3.174 (1H, dd, J1 ¼ 5.2 Hz,
3J2 ¼ 5.2 Hz, Ha), 2.177 (3H, s, pyrazole-CH3) ppm; 13C NMR (100 MHz,
DMSO-d6): d ¼ 152.82 (C3, Cquat.), 147.17 (C3”, Cquat.), 139.80 (C3’, –CH),
138.93 (C4’, –CH), 137.25 (C1”’, Cquat.), 135.53 (C5’, Cquat.), 129.30 (C3”’,5”’,
–CH), 129.00 (C5”, Cquat.), 126.25 (C4”, Cquat.), 124.84 (C2”’,6”’, –CH), 119.00
(C4”, Cquat.), 116.02 (C2’, Cquat.), 54.09 (C5, –CH), 43.04 (C4, –C), 12.23
(–CH3, pyrazole) ppm [Total signal observed ¼15: signal of C and CH2 ¼ 8
(thiophene-C ¼ 2, pyrazole-C ¼ 4, phenyl ring-C ¼ 1, pyrazole-CH2 ¼ 1),
signal of CH and CH3 ¼ 7 (thiophene-CH ¼2, pyarazole-CH ¼1, phenyl
ꢀ
ring-CH ¼3, pyrazole-CH3 ¼ 1]; IR (KBr): V¼ 3075 m(¼C–H)ar (w),
1620–1670 m(C ¼ N) (s), 1520–1450 m(C ¼ C)conjugated alkenes (m), 1400–1380
m(C–H)banding (m), 3415 m(N–H), 1290 m(C-N), 1250 m(C–C)alkanes (s), 1028
m(C-S-C)stre.(thiophene
(w), 606 m(N-Pt) (w), 556 m(S-Pt) (s) cmꢁ1;
ring)
UV–Vis (DMSO, c ¼ 10ꢁ4 mol dmꢁ3): kmax (e) ¼ 255 (21,770), 298