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Triple Helicate—Tetrahedral Cluster Interconversion Controlled by Host–Guest Interactions
Author(s) -
Scherer Markus,
Caulder Dana L.,
Johnson Darren W.,
Raymond Kenneth N.
Publication year - 1999
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(19990601)38:11<1587::aid-anie1587>3.0.co;2-r
Subject(s) - tetrahedron , host (biology) , cluster (spacecraft) , chemistry , crystallography , nanotechnology , materials science , computer science , biology , ecology , programming language
A unique ligand design allows the formation of both an M 2 L 3 triple helicate and an M 4 L 6 tetrahedron (M=Ti, Ga; L=ligand based on 2,6‐diaminoanthracene). Although the tetrahedron is entropically disfavored, a strong host–guest interaction with Me 4 N + is enough to drive the equilibrium towards the tetrahedron. Remarkably, the helicate can be quantitatively converted into the tetrahedron simply by addition of Me 4 N + (shown schematically).