Abstract
The reaction of 1,1′-bis(chlorocarbonyl)ferrocene with bis-aminobenzylcalix[4]arene gave amidoferrocene calix[4]arene monomer 1. Compound 1 crystallized in the monoclinic system P21/c with a = 11.196(6) Å, b = 14.971(11) Å, c = 32.007(2) Å, β = 96.413(4)° and V = 5330.9(6) Å3. X-ray diffraction analyses of 1 showed that the calix[4]arene scaffold was in cone conformation in which the intramolecular hydrogen bonding were formed through OH groups at the lower rim to stabilize the structure. Moreover, the intramolecular hydrogen bond between the amide groups of the amidoferrocene unit also presented in the crystal structure. On the other hand, the condensation of 1,1′-bis(chlorocarbonyl)ferrocene with p-tert-bis-aminobenzylcalix[4]arene resulted in the monomeric 2 and [2 + 2] dimeric compounds 3. 1H-NMR studies signified that the calix[4]arene building block in compounds 2 and 3 adopted the cone conformation.
Index Abstract
Synthesis and Characterization of Monomeric and Dimeric Structures of Calix[4]arenes Containing Amidoferrocene
Chomchai Suksai*, Pannee Leeladee, Colin Jennings, Thawatchai Tuntulani*, Palangpon Kongsaeree
The condensation of 1,1′-bis(chlorocarbonyl)ferrocene with p-tert-bis-aminobenzylcalix[4]arene resulted in the monomeric and [2 + 2] dimeric compounds.
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Acknowledgements
The financial support from The Thailand Research Fund and the Center of Innovation in Chemistry: Postgraduate Education and Research Program in Chemistry (PERCH-CIC) are gratefully acknowledged. CJ is supported by the NSF-REU Thailand program.
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Suksai, C., Leeladee, P., Jennings, C. et al. Synthesis and Characterization of Monomeric and Dimeric Structures of Calix[4]arenes Containing Amidoferrocene. J Chem Crystallogr 38, 363–368 (2008). https://doi.org/10.1007/s10870-007-9301-y
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DOI: https://doi.org/10.1007/s10870-007-9301-y