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cyclo ‐P 4 Building Blocks: Achieving Non‐Classical Fullerene Topology and Beyond
Author(s) -
Dielmann Fabian,
Peresypkina Eugenia V.,
Krämer Barbara,
Hastreiter Florian,
Johnson Brian P.,
Zabel Manfred,
Heindl Claudia,
Scheer Manfred
Publication year - 2016
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/anie.201606074
Subject(s) - chemistry , steric effects , topology (electrical circuits) , crystallography , fullerene , ligand (biochemistry) , stereochemistry , combinatorics , organic chemistry , mathematics , biochemistry , receptor
The cyclo‐P 4 complexes [Cp R Ta(CO) 2 (η 4 ‐P 4 )] (Cp R : Cp′′=1,3‐C 5 H 3 tBu 2 , Cp′′′=1,2,4‐C 5 H 2 tBu 3 ) turned out to be predestined for the formation of hollow spherical supramolecules with non‐classical fullerene‐like topology. The resulting assemblies constructed with CuX (X=Cl, Br) showed a highly symmetric 32‐vertex core of solely four‐ and six‐membered rings. In some supramolecules, the inner cavity was occupied by an additional CuX unit. On the other hand, using CuI, two different supramolecules with either peanut‐ or pear‐like shapes and outer diameters in the range of 2–2.5 nm were isolated. Furthermore, the spherical supramolecules containing Cp′′′ ligands at tantalum are soluble in CH 2 Cl 2 . NMR spectroscopic investigations in solution revealed the formation of isomeric supramolecules owing to the steric hindrance caused by the third tBu group on the Cp′′′ ligand. In addition, a 2D coordination polymer was obtained and structurally characterized.