Bioinorganic Chemistry and Applications / 2011 / Article / Tab 2 / Research Article
Synthesis Characterization and Biological Activity Study of New Schiff and Mannich Bases and Some Metal Complexes Derived from Isatin and Dithiooxamide Table 2 Important I.R. vibrations (cm−1 ) for the two Mannich and Schiff base ligands and their metal complexes.
Symbol ν
NH2 ν
C=O ν
C=N Thioamide group ν
M-N ν
M-O ν
M-S ν
M-Cl Band (I) δ N-H + ν C-S Band (II) ν C-N +ν C-S Band (III) ν C-S Band (IV) ν C=S LI H
3138
— 1730–1735
1614
1540
1429
1195
835
—
—
—
—
3203 C1 Mn(II)
3124
—
1732
1600
1510
1434
1190
820
248
283
325
246a
3371 C2 Co(II)
3072
—
1724
1602
1530
1433
1163
777
230
460
330
—
3263
270 C3 Ni(II)
3133
—
1720
1595
1535
1427
1150
827
293
464
330
—
3213 C4 Cu(II)
—
3315
1735
1600
1535
1434
1190
792
250
457
350
222b
1650
302 C5 Pd(II)
—
3392
1708
1604
1537
1430
1190
815
240
459
323
—
1660
301 C6 Ir(III)
—
3342
1735
1614
1539
1400
1151
810
350
—
330
253a
1650 C7 Pt(IV)
—
3168
1700
1600
1517
1446
1114
833
254
462
329
297a
1650 LII H
3043
—
1730
1614
1540
1434
1195
833
—
—
—
—
3193 C8 Co(II)
3151
—
1700
1602
1585
1440
1130
800
393
400
327
—
3321
227 C9 Ni(II)
3128
3249
1695
1600
1583
1484
1150
809
246
478
320
—
3249
250
340 C10 Pd(II)
—
3425
1735
1619
1587
1450
1155
820
464
—
323
240b
3249
1647
210 C11 Pt(IV)
—
3230
1730
1616
1530
1430
1150
802
468
450
325
291a
1650
480
262 C12 Cd(II)
—
3300
1735
1616
1488
1430
1161
800
288
468
325
—
1650
450
a : terminal; b : bridging.