Organic molecule bonding fullerenes

The conjugated C-atoms of a fullerene respond to the deviation from planarity by rehybridization of the sp o and the p Jt orbitals, since pure p character of Jt orbitals is only possible in strictly planar situations ]56]. The electronic struchue of non-planar organic molecules has been analyzed by Haddon using the Jt orbital axis vector (POAV) analysis. For Cjq an average o bond hybridization of sp and a fractional s character of 0.085 (POAVl) or 0.081 (POAV2) was foimd ]59-63]. Consequently, the Jt orbitals extend further beyond the outer surface than into the interior of Cgg. This consideration implies, moreover, that fullerenes and, in particular, Cgg are fairly electronegative molecules [64, 65] since, due to the rehybridization, low-lying Jt orbitals also exhibit considerable s character. 

The surface of fullerene molecules itself in porous fullerene - containing aerogel probably are screened for the interaction with other organic molecules owing to the bonding of possible 14 aminocompounds with fullerene molecules during the reaction of polycondensation [19]. So to prepare fullerene containing adsorbent with opened for interaction of fullerene molecules with other compounds it is better to modify silica surface by 3-aminopropyltrietoxysilane and then to modify this adsorbent by fullerene molecules. In this case fullerene molecules can be attached to the surface only from one side of molecule and after reaction of modification the pore surface will be covered by fullerene molecules. The pore diameter and specific surface area of prepared adsorbent will be determined... 

Figure 9. Organization of carbon sheets in nanocrystalhne carbons. Case (A) represent bent sheets which are stacked concentrically and randomly. In the high-resolution TEM of fullerene black filamentous structures from carbon macrocycles which did not react to fullerene molecules can also be seen (weak contrasts). Case (B) shows the arrangement of stacks of planar graphene units. Only few of these stacks are oriented with the o-axis parallel to the electron beam and can be imaged as illustrated in the sketch, the majority are randomly orientated and give hence an amorphous contrast. Case (C) is the same as (B) with the addition of covalent bonding interactions between the stacks. These bonds are invisible by electron microscopy but influence the graph-iti/ability of the carbon.

Chemistty Molecular shapes, inteipietation of spectra, chemical bonding, polymer studies, steieospecific reactions, chirality in organic species, molecular recognition, prediction of complex molecules, e.g. fullerenes... 

---