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Rotation vs. immobilization controversy in calix[6]arenes. Is 5,11,17,23,29,35-Hexa-tert-butyl-37,39,41-trimethoxy-38,40,42-tris(tert-butoxycarbonylmethoxy)calix[6]arene really immobilized?

✍ Scribed by Otsuka Hideyuki; Araki Koji; Sakaki Toru; Nakashima Kazuaki; Shinkai Seiji

Book ID: 104215914
Publisher: Elsevier Science
Year: 1993
Tongue: French
Weight: 279 KB
Volume: 34
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)79307-5

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✦ Synopsis

1H NMR spectral examinations revealed that the title compound, which was previously proposed to be conformationally-frozen, is not truly immobilized but the rate of the conformational change is just slower than that of the NMR time-scale.

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