RESOLUTION AND CONFIGURATIONAL STABILITY OF THE CHIRAL FULLERENES C-76, C-78, AND C-84 - A LIMIT FOR THE ACTIVATION-ENERGY OF THE STONE-WALES TRANSFORMATION

被引：79

作者：

HAWKINS, JM ^{[1
]}

NAMBU, M ^{[1
]}

MEYER, A ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1994年 / 116卷 / 17期

关键词：

D O I：

10.1021/ja00096a022

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Chiral fullerenes C-76, C-78, and C-84 were kinetically resolved by asymmetric osmylation providing three optically active allotropes of elemental carbon. The circular dichroism spectra of D-3 C-78 and D-2 C-84 are more detailed than the corresponding UV-vis spectra. Optically active C-76 and C-84 are configurationally stable under conditions approaching their limit of thermal (600-700 degrees C) and photochemical (193 nm) stability. Given the potential racemization of D-2 C-84 by two consecutive Stone-Wales pyracylene transformations, the configurational stability of C-84 at 700 degrees C sets a limit for the activation energy of the Stone-Wales transformation of > 83 kcal/mol.

引用

页码：7642 / 7645

页数：4

共 23 条

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