p-tert-Butylcalix[4] arene has been converted into the corresponding tetra (diphenylphosphinite) derivative which has a cone conformation; reaction with [Fe(CO)3(η2-C8H14)2] led to binding of two Fe(CO)3 units, as confirmed by X-ray analysis, at the surface provided by the four trivalent phosphorus donors.
D. Jacoby, C. Floriani, A. Chiesi-Villa and C. Rizzoli, J. Chem. Soc., Dalton Trans., 1993, 813 DOI: 10.1039/DT9930000813
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