By Andreas Hirsch (auth.), Prof. Dr. Andreas Hirsch (eds.)
The aesthetically enjoyable molecular architectures of fullerenes and nanotubes are beautiful not just due to their attractiveness but in addition simply because they're chargeable for the numerous exceptional chemical and actual houses of this compound type. even supposing succession of interesting new discoveries maintains unabated fullerene study has turn into a mature technology. it's now attainable to foretell fullerene chemistry, to layout new constitution diversifications like open fullerene clusters, heterofullerenes and endohedral fullerenes, and to boost fullerene fabrics and converted nanotubes with excessive capability for technological functions. This quantity represents the state of the art of fullerene examine, focussing on components exhibiting excessive strength for destiny development and functional functions. The authors are best scientists whose teams are making significant contributions within the field.
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Additional info for Fullerenes and Related Structures
B Space filling models of C60Br8 and C60Br24 24 A. Hirsch However, the halogenated fullerenes are significantly less stable than other alkyl halides (and also aryl halides). The maximum number of halogens (excluding fluorine here) that can be attached to the cage varies according to the size of the halogen. For bromination it is 24, and in these perbrominated derivatives, no halogen atoms are adjacent; they are never closer than 1,3- to each other. For chlorination the maximum number is approximately 40.
19 the cis-1 adducts of C60(NCOOR)2 stand out since they represent the first examples of [6,6]-adducts with open transannular [6,6]-bonds (Fig. 26) . Characteristic features within the fullerene framework of these valence isomers are the presence of (i) a doubly bridged 14-membered ring with a phenanthrene perimeter and (ii) an eight-membered 1,4-diazocine heterocycle. Upon changing the addition pattern, as demonstrated by the investigation of the other possible regioisomers of C60(NCOOR)2 , “regular” behavior with closed transannular [6,6]-bonds is observed.
Hirsch Fig. 19. Regioisomers 7–45 of the bis-adducts C62(COOEt)4 , C60(NCOOEt)2 , C62(anisyl)4 , C62(anisyl)2(COOEt)2 , and C61(COOEt)(NCOOEt)2 7,12,17,22,27,34,39:X1 = X2 = C(COOEt)2 ; 8,13,18,23,28,35,40 : X1 = X2 = NCOOEt; 9,14,19,24,29,36,41 : X1 = X2 = C(anisyl)2 ; 10,15,20,25, 30,37,2 : X1 = C(anisyl)2 , X2 = C(COOEt)2 ; 11,16,21,26,32,38,43 : X1 = NCOOEt, X2 = C(COOEt)2 ; 31 : X1 = C(COOEt)2 ; X2 = C(anisyl)2 ; 33 : X1 = C(COOEt)2 ; X2 =NCOOEt For a comparative analysis of the regioselectivities of these two-fold additions to C60 (Scheme 9) (Fig.