Table 2.
Electronic spectra of nickel and cobalt acetate complexes in acetonitrile
| Complex | Metal ion | Absorption in nm (extinction coefficient M−1 cm−1) | Calculated Δo (cm−1) | |||
|---|---|---|---|---|---|---|
| [Ni1(C2H3O2)]+ | Ni2+ | 354 (15) | 570 (7) | 829sh (5) | 979 (12) | 10 215 |
| [Ni2(C2H3O2)]+ | Ni2+ | 334 (37) | 559 (10) | 845sh (28) | 951 (36) | 10 515 |
| [Ni3(C2H3O2)]+ | Ni2+ | 354 (12) | 555 (9) | 821sh (9) | 943 (15) | 10 604 |
| [Ni4(C2H3O2)]+ | Ni2+ | 334 (21) | 556 (10) | 836sh (32) | 940 (38) | 10 638 |
| [Ni5(C2H3O2)]+ | Ni2+ | 337 (15) | 526 (12) | 777 (10) | 890 (17) | 11 236 |
| [Ni6(C2H3O2)]+ | Ni2+ | 318 (26) | 513 (11) | 794 (35) | 877 (38) | 11 403 |
| [Co1(C2H3O2)]+ | Co2+ | 464sh (17) | 510 (20) | 547sh (15) | 1063 (12) | |
| [Co2(C2H3O2)]2+ | Co3+ | 380 (235) | 523 (356) | 22 920 | ||
| [Co3(C2H3O2)]+ | Co2+ | 550 (74) | ||||
| Co(4)(C2H3O2)2+ | Co3+ | 370 (195) | 523 (249) | 22 920 | ||
| Co(5)(C2H3O2)+ | Co2+ | 453sh (19) | 501 (22) | 542sh (18) | 1008 (11) | |
| Co(6)(C2H3O2)2+ | Co3+ | 364 (151) | 507 (239) | 23 524 | ||