作者:Gargi Dutta、Moitree Laskar、B. D. Gupta
DOI:10.1021/om700938w
日期:2008.7.1
The complexes ArCH2CO(gH)(dpgH)Py have been synthesized and characterized by NMR. Molecular oxygen insertion into the Co-C bond in ArCH2CO(L)(dpgH)Py (L = gH, dmgH, chgH) complexes under photochemical conditions forms a mixture of products within 5 min. The equilibration/decomposition of ArCH2Co(L)(dpgH)Py to the corresponding ArCH2Co(L)(2)Py and ArCH2Co(dpgH)(2)Py complexes and molecular oxygen insertion starts immediately and simultaneously. The ratio of these products changes with time, and finally ArCH2(O-2)Co(L)(dpgH)Py and ArCH2(O-2)Co(dpgH)(2)Py are the major products formed. The spectral data are interrelated, and a good correlation is found between Delta delta(1)(H)(Py-alpha) and delta(13C)(C=N-gH) or delta(13C)(C=N-dpgH), indicating ring current throughout the metallabicycle. The CV data show that the dioxy complex is easier to reduce than the parent complex. The molecular structure of 4-Cl-C6H4CH2Co(dpgH)(gH)Py has been reported.