Synthesis of 'Skewered Complexes': Reaction of Rhenium Carbonyl Porphyrin Complexes with Antimony Pentachloride.
TEXAS A AND M UNIV COLLEGE STATION DEPT OF CHEMISTRY
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The Synthesis of the first skewered porphyrin complex is reported. Oxidative chlorination of rhenium carbonylporphyrin complexes by antimony pentachloride provides the first reported examples where out-of-plane metalloporphyrins react in a manner similar to cyclopentadienyl metal carbonyl complexes. From the reaction of a 14 or 12 mole ration of bistricarbonylrhenium-mu-tetraphenylporphyrin and antimony pentachloride, the corresponding salts ReCO3Cl2TPP.2SbCl6 or ReCO3ReCO3ReCO3ClTPP.SbCl6, respectively, were obtained in good yields. A third product ReCO32TPP.SbCl6 was also obtained. A X-ray structure determination on this compound was carried out. The monocationic metalloporphyrin has a similar structure to that found for the starting compound. However, in this case the M-M distance of 2.95 A indicates a probably metal-metal bond of bond-order 12 through the porphyrin core. Author
- Organic Chemistry