Research Article
Synthesis and Characterisation of New Symmetrical Binucleating Ligands and Their Binuclear Copper(II) Complexes
Table 1
Electronic spectral data for the complexes (in methanol).
| | No. | Complexes | | LMCT | LLCT | | (nm) (, M−1 cm−1) |
| | 1 | Cu2L1(OAc)ClO4·2H2O | 650 (184) | 388 (1270) | 288 (15 800)
248 (19 500) | | 2 | Cu2L2(OAc)ClO4·2H2O | 664 (297) | 436 (1330) | 288 (15 500)
246 (19 700) | | 3 | Cu2L1(Benz)ClO4·2H2O | 650 (143) | 390 (687) | 292 (10 900)
242 (18 600) | | 4 | Cu2L2(Benz)ClO4·2H2O | 645 (220) | 396 (1200) | 287 (15 200)
248 (17 200) | | 5 | Cu2L1Cl2·2H2O | 650 (290) | 420 (1310) | 284 (14 100)
244 (19 800) | | 6 | Cu2L2Cl2·2H2O | 638 (249) | 412 (540) | 286 (12 500)
238 (13 000) | | 7 | Cu2L1(ClO4)2·2H2O | 657 (208) | 405 (sh) | 287 (14 700)
235 (16 300) | 8
| Cu2L2(ClO4)2·2H2O | 658 (192) | 410 (sh) | 285 (13 300)
234 (14 900) |
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CT: charge transfer, Sh: shoulder.
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