Studies on the synthesis, characterization, binding with DNA and activities of two cis-planaramineplatinum(II) complexes of the form: cis-PtL(NH3)Cl2 where L = 3-hydroxypyridine and 2,3-diaminopyridine

Table 3 Prominent peaks observed in the ESI mass and ¹H NMR spectra of AH3 and AH7

	ESI Mass	¹H NMR
AH3 MM = 378.1	EIS-MS (DMF) (ClPt-μ-(NH)Pt(Cl)(3-hydroxypyridine)-μ-(NH)Pt(3-hydroxypyridine) = 876 (0.57); (NH₂)₂Pt-μ-(NH)Pt(pyridine) = 516 (0.98); (M - OH - 4H) = 357 (0.11); (M - NH₃ - 2Cl + 3-hydroxypyridine - H) = 384 (1.00)	¹ H NMR DMSO δ ppm: 10.80 (s br, due to OH); 8.42 (d, due to CH ortho); 8.14 (d, due to CH ortho); 8.03 (d, due to CH para); 8.02 (quartet, due to CH meta); 4.30 (s, due to NH-Pt); 3.86 (s, NH-Pt); 3.34 (s, due to water); 2.50 (due to DMSO)
AH7 MM = 392.1	EIS-MS (DMF) (PtCl(2,3-diaminopyridine) = 516 (0.36); (M - Cl + 2,3-diaminopyridine) = 438 (1.00); (M - H) = 377 (0.09); (M - H -NH₃) = 360; (M - Cl - NH₃ - H) = 324 (0.66); (M - Cl - (2,3-diaminoyridine) + NH₃) = 265 (0.31)).	¹H NMR DMSO δ ppm: 7.30 (due to CH); 7.20 (due to CH); 6.90 (due to CH); 4.02 (s; NH-Pt); 3.34 (d, due to water); 2.70 (NH), 2.50 (due to DMSO), 2.40 (s, NH))

The letters 's', 'm', 'w', 'd' and 'br' stand for 'strong', 'medium', 'weak', 'doublet' and 'broad' respectively.