De-Ji Che, Gang Li, Xiao-Lan Yao
Oct 15, 1998
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Influential Citations
9
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Journal
Journal of Organometallic Chemistry
Abstract
Abstract The photo-induced ligand exchange reactions of ferrocenylacetylacetone (FA) in the presence of pyridine (Py) or 4,4′-dipyridyl (Dipy) in deoxygenated acetonitrile under irradiation with visible light have been investigated. The mechanism of the reactions was proposed to involve three steps: the first is the photo-induced charge transfer, resulting in the deligation of FA to yield the free Fe(II) ion, cyclopentadienylacetylacetonate (CAnate) and η°-bonded cyclopentadienyl ring (η°-Cp). The second process is the proton-transfer from FA to CAnate and η°-Cp, forming cyclopentadienylacetylacetone (CA) and 1,3-cyclopentadiene, which were detected by GC–MS analyses. The third process is the complex formation, the photo-liberated Fe(II) ion was coordinated with deprotonated FA(FAnate), generating the mononuclear complex, [Fe(FAnato)2(Py)2], or polynuclear complex, [{Fe(FAnato)2(Dipy)2×1/2}n], which were characterized by elemental analyses, IR and X-ray structure analysis. Crystallographic data for complex, [Fe(FAnato)2(Py)2]: monoclinic, space group P21/c, a=8.212(3), b=9.945(2), c=19.953(3) A, β=98.18(3)°, R=0.0705, WR=0.0803.