Cyclic [5]Paraphenyleneacetylene: Synthesis, Properties, and Formation of a Ring-in-Ring Complex Showing a Considerably Large Association Constant and Entropy Effect
In the ring: The title compound ([5]CPPA), the smallest belt‐shaped conjugated system known to date, forms a considerably stable ring‐in‐ring complex with [8]CPPA (see picture). [8]CPPA⊃[5]CPPA has a smaller contact area than [9]CPPA⊃[6]CPPA but its large Ka and ΔH values reveal that the interaction...
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Veröffentlicht in: | Angewandte Chemie International Edition 2007-01, Vol.46 (7), p.1086-1088 |
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container_title | Angewandte Chemie International Edition |
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creator | Kawase, Takeshi Nishiyama, Yoshitaka Nakamura, Takamitsu Ebi, Takahiro Matsumoto, Kouzou Kurata, Hiroyuki Oda, Masaji |
description | In the ring: The title compound ([5]CPPA), the smallest belt‐shaped conjugated system known to date, forms a considerably stable ring‐in‐ring complex with [8]CPPA (see picture). [8]CPPA⊃[5]CPPA has a smaller contact area than [9]CPPA⊃[6]CPPA but its large Ka and ΔH values reveal that the interaction results from the electrostatic attractive force rather than the dispersion force. |
doi_str_mv | 10.1002/anie.200603707 |
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source | Wiley Online Library Journals Frontfile Complete |
subjects | cyclic alkynes host-guest systems inclusion compounds noncovalent interactions strained molecules |
title | Cyclic [5]Paraphenyleneacetylene: Synthesis, Properties, and Formation of a Ring-in-Ring Complex Showing a Considerably Large Association Constant and Entropy Effect |
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