Table 3.
1H-NMR data of I, II, III and IV.
| Complex | 1H δ(SiMe4) (in CD2CCl2) | Ligand Structure |
|---|---|---|
| I | 7.37–7.28 (m, Hb + Hd) 6.82 (d, Ha, Jab = 8.1Hz) 6.67 (t, Hc, Jbc = 8.1Hz) 5.88–5.72 (dd, –C6H4, J = 6.2 Hz) 5.47 (s, br, –NH2) 2.78 (spt, 1H, –CH(CH3)2, J = 6.9 Hz) 1.61 (s, –CH3) 1.30 (d, –CH(CH3)2, J = 6.9 Hz) |
|
| II | 7.23 (m, Ha) 6.54 (m, Hb) 5.75–5.53 (dd, –C6H4, J = 6.2 Hz) 4,72 (s, br, –NH2) 2.65 (spt, –CH(CH3)2) 2.07 (s, –CH3) 1.18 (d, 6H, –CH(CH3)2, J = 6.8 Hz) |
|
| III | 8.54 (d, Hd, J = 4.8 Hz) 7.42 (pst, Hc) 6.62 (pst, Hb) 6.58 (d, Ha, J = 8.0 Hz) 6.12 (s, br, –NH2) 5.53–5.31 (dd, –C6H4, J = 6.0 Hz) 2.93 (spt, –CH(CH3)2, J = 7.2 Hz) 1.96 (s, –CH3) 1.28 (d, 6H, –CH(CH3)2, J = 6.8 Hz) |
|
| IV | 8.33 (d, Ha, J = 6.9 Hz) 6.43 (d, Hb, J = 6.9 Hz) 4.55 (s, br, –NH2) 5.37–5.137 (dd, –C6H4, J = 6.0 Hz) 2.90 (spt, –CH(CH3)2, J = 6.9 Hz) 2.12 (s, –CH3) 1.27 (d, –CH(CH3)2, J = 6.9 Hz) |
|