Research Article
Synthesis and Improvement of Activity of Cobalt Organic Salts as Drier
Table 1
Comparison of the effect of ligand on the activity of cobalt drier (
3),
and
of
6.
| | Drier | (nm) | mol−1cm−1 | Drying (hr) | Explanation |
| | Blank | — | — | >24 | Cross-linking did not take place. | | 3 | 625 | 300 | 4 | As reference. | | 6a | 690 | 370 | 3 | Electron donating of nitrogen increased the reactivity of cobalt. | | 6b | 630 | 320 | 3 | Resonance of electron pair of nitrogen with aromatic ring made aniline ineffective. | | 6c | 626 | 305 | 4 | Positive charge of nitrogen resulted from the coordination to cobalt made Et3N unreactive. | | 6d | 688 | 346 | 3 | Electron donating of nitrogen increased the reactivity of cobalt. | | 6e | 635 | 332 | 5 | Electronegativity of oxygen decreased the nucleophilicity of the ligand. | | 6f | 618 | 216 | 9 | The stability of redox reaction products postponed the cross linking. |
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