Research Article
Synthesis and Characterization of Trivalent Cerium Complexes of p-tert-Butylcalix[4,6,8]Arenes: Effect of Organic Solvents
Table 2
Observed FT-IR bands of the synthesized complexes at 25°C.
| | Sample | Wavelength in cm−1 | | ν(OH) | C(CH3)3 | –CH2– | ν(C–OH) | ν(C=C) | δ(C–H) | CH3 wagging |
| | Ligand-1 | 3168 (sb) | 2960 (s) | 2908 (vwsh) | 1200 (s) | 1484 (w) | 872 (w) | 964 (w) | | | | | 2872 (vwsh) | 1364 (w) | 1608 (w) | | | | Complex 1 | 3192 (sb) | 2960 (s) | — | 1202 (s) | 1484 (w) | 872 (w) | 964 (w) | | | | | 2872 (vwsh) | 1306 (s) | 1652 (w) | | | | Ligand-2 | 3152 (vsb) | 2960 (s) | 2908 (vwsh) | 1204 (vs) | 1486 (vs) | 874 (w) | 912 (m) | | | | | 2872(vwsh) | 1209 (s) | 1608 (w) | | | | | | | | 1364 (s) | | | | | Complex 2 | 3428 (mb) | 2960 (s) | — | 1204 (w) | 1490 (s) | 872 (w) | 910 (vw) | | | | | 2872 (vwsh) | 1364 (vw) | 1614 (s) | | | | Ligand-3 | 3232 (sb) | 2960 (s) | 2908 (vwsh) | 1204 (vs) | 1488 (s) | 874 (w) | 914 (w) | | | | | 2872 (vwsh) | 1364 (w) | 1604 (s) | | | | Complex 3 | 3408 (sb) | 2960 (s) | — | 1208 (vw) | 1462 (w) | 872 (w) | 964 (w) | | | | | — | 1386 (m) | 1604 (s) | | |
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sh: shoulder, w: weak, m: medium, s: strong, v: very, b: broad.
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