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Heterotopic Host Molecules for Binding Two Different Guests
Author(s) -
Reetz Manfred T.,
Niemeyer Christof M.,
Harms Klaus
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.199114741
Subject(s) - boron , chemistry , amine gas treating , alkoxy group , molecule , crown ether , acceptor , ether , cryptand , host–guest chemistry , ammonium , alcohol , ion , lewis acids and bases , polymer chemistry , photochemistry , organic chemistry , supramolecular chemistry , catalysis , alkyl , physics , condensed matter physics
Host molecules with boron‐containing acceptor and crown ether donor positions like compound 1 , depicted for the preceding communication, can selectively bind alcohols and amines. The Lewis acidic boron center engages with the Brønsted properties of the alcohol/amine system so that the alkoxy ion is bound to boron and the ammonium ion to the crown ether unit. This is shown schematically in the equation below. The structure of the host/guest 1 /guest 2 is highly unusual.