Regiospecific Coordination of Re3 Clusters with the Sumanene‐Type Hexagons on Endohedral Metallofullerenes and Higher Fullerenes That Provides an Efficient Separation Method. Issue 19 (26th March 2014)

• Record Type: Journal Article
• Authors: Chen, Chia‐Hsiang; Lin, Dong‐Yui; Yeh, Wen‐Yann
• Is Part Of: Chemistry. Volume 20:Issue 19(2014)
• Page Start: 5768
• Page End: 5775
• Publication Date: 2014-03-26
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201304356
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The reactions of [(μ‐H)<sub>3</sub>Re<sub>3</sub>(CO)<sub>11</sub>(NCMe)] with Sc<sub>2</sub>@C<sub>82</sub>‐<italic>C</italic><sub>3<italic>v</italic></sub>(8), Sc<sub>2</sub>C<sub>2</sub>@C<sub>80</sub>‐<italic>C</italic><sub>2<italic>v</italic></sub>(5), Sc<sub>2</sub>O@C<sub>82</sub>‐<italic>C<sub>s</sub></italic>(6), C<sub>86</sub>‐<italic>C</italic><sub>2</sub>(17), and C<sub>86</sub>‐<italic>C<sub>s</sub></italic>(16) have been carried out to produce face‐capping cluster complexes. The Re<sub>3</sub> triangles are found to bind to the sumanene‐type hexagons on the fullerene surface regiospecifically. In contrast, Sc<sub>3</sub>N@C<sub>78</sub>‐<italic>D</italic><sub>3<italic>h</italic></sub>(5) and Sc<sub>3</sub>N@C<sub>80</sub>‐<italic>I</italic><sub>h</sub> show no reactivity toward [(μ‐H)<sub>3</sub>Re<sub>3</sub>(CO)<sub>11</sub>(NCMe)], probably due to electronic and steric factors. These complexes can be easily purified by using HPLC. Carbonylation of each complex releases the corresponding higher fullerene or endohedral metallofullerene in pure form. Remarkably, the C<sub>86</sub>‐<italic>C</italic><sub>2</sub>(17) and C<sub>86</sub>‐<italic>C<sub>s</sub></italic>(16) isomers were successively separated through Re<sub>3</sub> cluster complexation/decomplexation. This unique bonding feature may provide an attractive general strategy to purify as yet unresolved fullerene mixtures.</p> </abstract>