Synthesis, Spectroscopic, Molecular Structure, and Antibacterial Studies of Dibutyltin(IV) Schiff Base Complexes Derived from Phenylalanine, Isoleucine, and Glycine
Table 2
Important IR spectral data (cm−1) of Schiff bases and their corresponding organotin(IV) complexes.
Compounds
ν(OH)
(C=N–)
(C=O)
(COO)
(COO)
(Sn←N)
(Sn–O)
(Sn–C)
L1H
3090–2740 br
1620 s
1728 s
—
—
—
—
—
—
Bu2Sn(L1)2
—
1610 s
1722 s
1590 vs
1325 s
265
540 w
430 m
622 m
L2H
3100–2740 br
1625 s
1730 s
—
—
—
—
—
—
Bu2Sn(L2)2
—
1612 s
1726 s
1605 m
1333 m
272
545 m
426 s
640 m
L3H
3090–2750 br
1630 s
1720 s
—
—
—
—
—
—
Bu2Sn(L3)2
—
1616 s
1722 s
1601 s
1332 m
268
552 m
425 m
630 m
L4H
3110–2750 br
1622 s
1735 s
—
—
—
—
—
—
Bu2Sn(L4)2
—
1605 s
1732 s
1608 s
1330 m
278
545 s
420 w
635 m
L5H
3080–2730 br
1630 s
1735 s
—
—
—
—
—
—
Bu2Sn(L5)2
—
1612 s
1734 s
1595 vs
1326 s
269
540 w
425 w
625 m
L6H
3109–2730 br
1622 s
1725 s
—
—
—
—
—
—
Bu2Sn(L6)2
—
1610 s
1728 s
1610 vs
1340 vs
270
544 w
432 m
632 m
br: broad, vs: very sharp, v: sharp, m: medium, and w: weak.