Polyolefins carbon hybrid

It should be noted that the surface curvature of the carbon network exerts a profound impact on the reactivity of the fullerene core. The most striking consequence is the pyramidalization of the individual carbon atoms. Influenced by the curvature, the sp hybrids, which exist in truly 2-dimensional planar carbon networks, adopt a sp hybridization with p-orbitals that posses a s-character of 0.085 (19). Accordingly, the exterior surface is much more reactive than planar analogues, and becomes comparable to those of electron deficient polyolefines. This, in turn, rationalizes the high reactivity of the fullerene core towards many photolytically generated carbon- and heteroatomic-centered radicals (20). 

The carbon-carbon bonds constitute the backbone of a polyolefin chain. In principle, each carbon atom contains four bonds aligning along the tetrahedron sp hybrid orbits with the bond angles fixed at 109°287 In other words, the connection of... 

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