3
4
3
4.31 (1H, m) (methine); 4.16 (1H, dd, J=12.6 Hz, J=4.0 Hz), 3.75 (1H, dd, J=12.6 Hz,
4J=9.5 Hz), 3.54 (2H, d, 3J=4.7 Hz) (methylene); 2.33 (3H, s) (methyl). 13C NMR DMSO-d6,
ppm): 162.6 (azomethine); 156.3, 152.4, 123.6, 121.5, 120.7, 117.2 (aromatic); 84.2
(methine), 65.3, 65.2 (methylene); 56.1 (methyl).
[MoO2(HL5)]: Yield 88%. Anal. Calc. for BrC10H10NO5Mo: C, 30.0; H, 2.5; N, 3.5.
Found: C, 30.1; H, 2.4; N, 3.6%. IR (KBr, cm-1): 3426 νO-H); 1631 νC=N); 1608, 1516 (νC=C);
1238 (νC-O); 927, 895 (νMo=O). UV-Vis spectrum in DMSO [λmax (nm), ɛ (M-1 cm-1)] 285
(9820), 357 (1170). CD spectrum in DMSO [λmax (nm), Δɛ (M-1 cm-1)] 282 (5.24), 366 (2.16).
1H NMR DMSO-d6, ppm): 8.71 (1H, s) (azomethine); 7.66 (1H, s), 7.56 (1H, dd, 3J=8.3 Hz,
3
4J=2.2 Hz), 6.90 (1H, d, J=8.3 Hz) (aromatic); 4.94 (1H, brs) (hydroxyl); 4.30 (1H, m)
3
4
3
4
(methine); 4.14 (1H, dd, J=12.6 Hz, J=4.0 Hz), 3.74 (1H, dd, J=12.6 Hz, J=9.5 Hz), 3.54
(2H, d, J=4.7 Hz) (methylene). 13C NMR DMSO-d6, ppm): 163.4 (azomethine); 155.8,
152.6, 122.4, 121.0, 120.4, 116.9 (aromatic); 85.8 (methine), 64.4, 64.2 (methylene).
3
[MoO2(HL6)]: Yield 80%. Anal. Calc. for C10H10N2O7Mo: C, 32.8; H, 2.8; N, 7.7.
Found: C, 32.7; H, 2.8; N, 7.6%. IR (KBr, cm-1): 3391 νO-H); 1639 νC=N); 1608, 1480 (νC=C);
1561, 1346 νNO2); 1480 (νC=C); 1272 (νC-O); 934, 909 (νMo=O). UV-Vis spectrum in DMSO
[λmax (nm), ɛ (M-1 cm-1)] 343 (13040). CD spectrum in DMSO [λmax (nm), Δɛ (M-1 cm-1)] 352
3
(3.87). 1H NMR DMSO-d6, ppm): 8.92 (1H, s) (azomethine); 8.71 (1H, d, J=2.6 Hz), 8.26
(1H, dd, 3J=9.0 Hz, 4J=2.6 Hz), 7.02 (1H, d, 3J=9.0 Hz) (aromatic); 4.92 (1H, brs) (hydroxyl);
3
4
3
4.29 (1H, m) (methine); 4.13 (1H, dd, J=12.6 Hz, J=4.0 Hz), 3.73 (1H, dd, J=12.6 Hz,
4J=9.5 Hz), 3.53 (2H, d, J=4.7 Hz) (methylene). 13C NMR DMSO-d6, ppm): 166.5
3
(azomethine); 158.7, 153.3, 131.4, 129.8, 121.4, 120.9 (aromatic); 86.7 (methine); 63.8, 63.6
(methylene).
[MoO2(HL7)]: Yield 87%. Anal. Calc. for C10H11NO6Mo: C, 35.6; H, 3.3; N, 4.2.
Found: C, 35.5; H, 3.2; N, 4.2%. IR (KBr, cm-1): 3314 νO-H); 1637 νC=N); 1613, 1491 (νC=C);
1237 (νC-O); 930, 891 (νMo=O). UV-Vis spectrum in DMSO [λmax (nm), ɛ (M-1 cm-1)] 288
(7650), 336 (2610). CD spectrum in DMSO [λmax (nm), Δɛ (M-1 cm-1)] 291 (4.92), 345 (3.65).
1H NMR DMSO-d6, ppm): 10.29 (1H, s) (hydroxyl); 8.53 (1H, s) (azomethine); 7.43 (1H, d,
3
3J=8.3 Hz), 6.42 (1H, d, J=8.3 Hz), 6.26 (1H, s) (aromatic); 4.94 (1H, brs) (hydroxyl); 4.31
3
4
3
4
(1H, m) (methine); 4.15 (1H, dd, J=12.6 Hz, J=4.0 Hz), 3.74 (1H, dd, J=12.6 Hz, J=9.5
3
13
Hz), 3.54 (2H, d, J=4.7 Hz) (methylene). C NMR DMSO-d6, ppm): 164.0 (azomethine);
154.9, 152.0, 136.2, 114.4, 108.8, 105.0 (aromatic); 86.4 (methine); 64.0, 63.8 (methylene).
[MoO2(HL8)]: Yield 76%. Anal. Calc. for Br2C10H9NO5Mo: C, 25.1; H, 1.9; N, 2.9.
Found: C, 25.0; H, 1.8; N, 3.0%. IR (KBr, cm-1): 3468 νO-H); 1640 νC=N); 1599, 1472 (νC=C);
1249 (νC-O); 925, 911 (νMo=O). UV-Vis spectrum in DMSO [λmax (nm), ɛ (M-1 cm-1)] 284
(4640), 359 (1020). CD spectrum in DMSO [λmax (nm), Δɛ (M-1 cm-1)] 281 (5.46), 357 (1.84).
3
1H NMR DMSO-d6, ppm): 8.76 (1H, s) (azomethine); 8.04 (1H, d, J=2.4 Hz), 7.85 (1H, d,
3J=2.4 Hz) (aromatic); 4.96 (1H, brs) (hydroxyl); 4.34 (1H, m) (methine); 4.16 (1H, dd,
4
3
4
3
3J=12.6 Hz, J=4.0 Hz), 3.74 (1H, dd, J=12.6 Hz, J=9.5 Hz), 3.55 (2H, d, J=4.7 Hz)
(methylene). 13C NMR DMSO-d6, ppm): 162.8 (azomethine); 155.4, 152.0, 121.9, 121.0,
120.1, 116.2 (aromatic); 87.4 (methine), 64.2, 64.0 (methylene).
[MoO2(HL9)]: Yield 78%. Anal. Calc. for C14H13NO5Mo: C, 45.3; H, 3.5; N, 3.8.
Found: C, 45.4; H, 3.4; N, 3.8%. IR (KBr, cm-1): 3436 νO-H); 1627 νC=N); 1614, 1510 (νC=C);
1246 (νC-O); 936, 898 (νMo=O). UV-Vis spectrum in DMSO [λmax (nm), ɛ (M-1 cm-1)] 284
5