New isolated-pentagon-rule and skeletally transformed isomers of C100 fullerene identified by structure elucidation of their chloro derivativesстатья
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Аннотация:High-temperature chlorination of C100 fullerene followed by X-ray structure determination of chlorides allowed the identification of three Isolated-Pentagon-Rule (IPR) isomers of C100, nos. 18, 425, 417, in the fullerene soot for the first time. Among them, isomers C2-C100(18) and C1-C100(425) afforded respectively C2-C100(18)Cl28/30 and C1-C100(425)Cl22 compounds retaining the IPR cage connectivities. In contrast, isomer C2v-C100(417) gives Cs-C100(417)Cl28 which undergoes a skeletal transformation by C2 loss resulting in a non-classical C1-C98(NC)Cl26 with a heptagon in the carbon cage. Most probably, two non-classical C1-C100(NC)Cl18/22 chlorides originate from the IPR isomer C1-C100(382), though both C1-C100(344) and even non-classical C1-C100(NC) can be also considered as the starting isomers.