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Incarcerated Atoms and Reactive Molecules
Author(s) -
Hopf Henning
Publication year - 1991
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199111171
Subject(s) - fullerene , cyclobutadiene , molecule , helium atom , chemistry , helium , atom (system on chip) , nanotechnology , photochemistry , materials science , organic chemistry , computer science , embedded system
The two most spectacular host‐guest complexes of recent times are reported here: 1. Cram et al. have successfully synthesized unsubstituted cyclobutadiene in a hemicarcerand at room temperature. This combines the chemists' desire for measurable amounts of highly reactive molecules with that of being able to investigate the molecule, disturbed as little as possible by chemical stabilization. 2. Schwarz et al. have been able to produce complexes of C 70 ˙⊕ ‐ and C 60 ˙⊕ ‐fullerene and helium mass spectrometrically; on the basis of several findings, the helium atom in these complexes must be located in the cage. This success could have an enormous stimulating influence on the endohedral chemistry of the fullerenes.