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Coinage Metal Pyrazolates [(3,5-(CF<sub>3</sub>)<sub>2</sub>Pz)M]<sub>3</sub> (M = Au, Ag, Cu) as Buckycatchers
No full textThe synthesis and
characterization of supramolecular assemblies {C<sub>60</sub><b>[M<sub>3</sub>]<sub>4</sub></b>}<sub>∞</sub> consisting
of C<sub>60</sub> and coinage metal pyrazolates <b>[M<sub>3</sub>]</b> (i.e., [(3,5-(CF<sub>3</sub>)<sub>2</sub>Pz)ÂM]<sub>3</sub>, where Pz = pyrazolate and M = Au, Ag, and Cu) are reported. {C<sub>60</sub><b>[Cu<sub>3</sub>]<sub>4</sub></b>}<sub>∞</sub>, {C<sub>60</sub><b>[Ag<sub>3</sub>]<sub>4</sub></b>}<sub>∞</sub> and {C<sub>60</sub><b>[Au<sub>3</sub>]<sub>4</sub></b>}<sub>∞</sub> form isomorphous crystals. The <b>[M<sub>3</sub>]</b> moieties adopt a concave conformation to complement the
convex C<sub>60</sub> surface. They exist as dimers of trimers (i.e.,
hexanuclear <b>[M<sub>3</sub>]<sub>2</sub></b> units) that are
held together by three close M···M metallophilic interactions
at 3.1580(17), 3.2046(7), and 3.2631(7) Ã… for copper, silver,
and gold systems, respectively. The <b>[M<sub>3</sub>]<sub>2</sub></b> moieties surround each C<sub>60</sub> in a tetrahedral fashion,
while each <b>[M<sub>3</sub>]<sub>2</sub></b> is sandwiched
by two C<sub>60</sub> molecules to form a supramolecular 3D assembly
