Synthesis and properties of novel ditopic polypyridine ligands bridged by one and two acetylenic bonds |
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| Authors: | Vincent Grosshenny Raymond Ziessel |
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| Institution: | Ecole Europ′eenne des Hautes Industries Chimiques de Strasbourg Institut de Physique et de Chimie des Matériaux de Strasbourg 1, rue Blaise Pascal, 67008 Strasbourg Cedex, France |
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| Abstract: | Ethynyl substituted bipyridine chelates react with bromo or triflate functionalized bipyridine or terpyridine subunits, in the presence of catalytic amounts of Pdo(PPh3)4 to yield, the new homo- and heteroditopic ethynyl bridge ligands 2a, 4a, 7a and 8. Self coupling of the ethynyl substituted bipyridine species in the presence of CuCl/TMEDA/O2, yield the symmetric diethynyl bridge ligands 2b, 4b and 7b. |
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