Synthesis, Spectral, and In Vitro Antibacterial Studies of Organosilicon(IV) Complexes with Schiff Bases Derived from Amino Acids

Table 2

Important IR spectral data (cm⁻¹) of Schiff bases and their corresponding organosilicon(IV) complexes.

Compounds	𝜈 (OH)	𝜈 (C=N–)	𝜈 (C=O)	𝜈 (COO)asym	𝜈 (COO)sym	Δ𝜈	𝜈 (Si←N)	𝜈 (Si–O)
L^𝟏H	3,090–2750 br	1625 s	1,720 s	—	—	—	—	—
Me3SiL^𝟏	—	1610 m	1722 m	1588 vs	1322 m	266	570 m	425 m
L^𝟐H	3105–2790 br	1635 s	1730 s	—	—	—	—	—
Me3SiL^𝟐	—	1622 s	1729 s	1595 vs	1320 s	275	550 w	430 m
L^𝟑H	3090–2750 br	1625 s	1720 s	—	—	—	—	—
Me3SiL^𝟑	—	1614 s	1720 s	1604 s	1332 s	272	555 s	420 w
L^𝟒H	3090–2740 br	1620 s	1728 m
Me3SiL^𝟒		1608 m	1726 m	1590 s	1318 m	272	550 m	428 m
L^𝟓H	3108–2795 br	1630 s	1725 s	—	—	—	—	—
Me3SiL^𝟓	—	1615 s	1724 s	1594 s	1324 s	270	568 m	429 s
L^𝟔H	3090–2740 br	1620 s	1728 s	—	—	—	—	—
Me3SiL^𝟔	—	1609 s	1730 s	1600 s	1324 m	276	558 m	427 w
L^𝟕H	3110–2750 br	1622 s	1735 s	—	—	—	—	—
Me3SiL^𝟕	—	1611 s	1732 s	1597 vs	1322 s	275	560 w	425 w
L^𝟖H	3100–2740 br	1625 s	1730 m	—	—	—	—	—
Me3SiL^𝟖	—	1610 m	1732 s	1592 s	1320 m	272	565 m	435 m

br: broad, vs: very sharp, v: sharp, m: medium, and w: weak.