"Tail–Tail Dimerization" of Ferrocene Amino Acid Derivatives
摘要：
Acid anhydrides of N-protected 1-aminoferrocene-1-carboxylic acid (Fca) have been prepared and spectroscopically characterized (protection group Boc, Fmoc, Ac; 4a4c). The structure of the Boc-derivative 4a has been determined by single-crystal X-ray crystallography. An intramolecular NH···O hydrogen bond involving the carbamate units results in a ring structure containing the two ferrocene units, the anhydride moiety, and the hydrogen bond. In the crystal, the individual molecules are connected by intermolecular NH···O hydrogen bonds of the carbamate unit. Experimental and theoretical studies suggest that the ring motif is also a dominant species in solution. Electronic communication across the anhydride moiety is found to be very weak as judged from electrochemical, spectroscopic, and theoretical experiments.
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DOI：
10.1002/ejic.201000384
被引量：
年份：
2010
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