Research Article
Synthesis, Spectroscopic and Thermal Characterization of Copper(II) and Iron(III) Complexes of Folic Acid and Their Absorption Efficiency in the Blood
Table 2
IR frequencies (Cm1 ) of folic acid (FO) and its metal complexes.
| Assignments | Compounds | Folic acid | Fe-folate complex | Cu-folate complex |
| | 34213415 | 3381 | 3388 | (NH) amide | 3230 | 3175 | 3220 | (CH) | 31062926 | 30902930 | 30302930 | (CH) | 2840 | 28202770 | 28302805 | (CO) amide I | 1652 | 1658 | 1655 | (COOH) | 1718 | — | — | (COO−) | 1569 | 1613 | 1603 | (CH) | 14831413 | 14481401 | 14451400 | (COO−) | 1453 | 1369 | 1350 | (NH) amide II | 1528 | 1520 | 1532 | (CC) | 1323 | 1303 | 1300 | (CN) | 123011911106 | 11851106 | 11861102 | (CC) | 971 | 980 | 955 | (CC) | 764 | 767 | 766 | (M–O) | — | 587520 | 585521 |
|
|