Numbering of Fullerenes (IUPAC Recommendations 2004)

3.3.4. Systematic numbering for (C82-Cs)[5,6]fullerene

Continued from 3.3.2. Systematic numbering for (C70-Cs)[5,6]fullerene

3.3.4. Systematic numbering for (C82-Cs)[5,6]fullerene (Fig. 30)
(Atlas [ref 5] Ref. No. 82:2; CAS Reg. No. 145954-07-0).

In this fullerene the plane of symmetry bisects five six-membered rings indicated as A, B, C, D, and E in Fig. 30a. Ring C contains only 6,6,5 atoms; rings B and E contain two 6,6,6 and four 6,6,5 atoms, each; ring A contains four 6,6,6 and two 6,6,5 atoms; ring D contains only 6,6,6 atoms, and thus is preferred to begin the numbering (Fu- However, none of the pathways from this ring is contiguous, and the pathways from ring A, which contains a sequence of four 6,6,6 atoms must be examined. The atoms of this ring are indicated as a/a', b/b', and c/c' in Fig. 30a. There are six clockwise pathways to be examined, one from each atom. Only those from a (Fig. 30b) and from b' (Fig. 30c) are contiguous. The latter is preferred because it starts closer to the reference plane (Fu-3.3.3a).

Fig. 30. Systematic numbering of (C70-Cs)[5,6]fullerene

Reference for this section

5. P.W. Fowler and D.E. Manolopoulos, An Atlas of Fullerenes, Clarendon Press, Oxford, 1995

Continued with 3.4. Fullerenes belonging to the Ci or C1 point groups and having a contiguous helical numbering pathway.
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