Table 2 Infrared absorption bands shifting of pipemidic acid metal complexation
From: Synthesis, characterization, and antibacterial studies of pipemidic acid metal complexes
Drug complex with | O–H stretch | Carboxylic acid C = O | Pyridone ring C = O (ketone) |
|---|---|---|---|
Reported drug | 3465 | 1640 | 1619 |
Ref. drug | 3460 b | 1640 m | 1620 m |
Magnesium | 3400 m | 1620 b | 1734 m |
Calcium | 3420 b | 1619 s | 1735 s |
Chromium | 3430 b | 1610 s | 1729 s |
Manganese | 3420 b | 1612 b | 1732 sm |
Iron | 3440 b | 1605–1630 b | 1730 sm |
Cobalt | 3410 b | 1620 b | 1732 m |
Nickel | 3390 b | 1613 s | 1725 m |
Copper | 3380 b | 1605 m | 1724 m |
Zinc | 3420 b | 1618 m | 1730 m |
Cadmium | 3440 b | 1600 b | 1720 s |