Preparation and Reactivity of [D3d]-Octahedrane: The Most Stable (CH)12 Hydrocarbon
作者:Armin de Meijere、Chi-Hung Lee、Mikhail A. Kuznetsov、Dmitriy V. Gusev、Sergei I. Kozhushkov、Andrey A. Fokin、Peter R. Schreiner
DOI:10.1002/chem.200500472
日期:2005.10.21
and 4 kcal mol(-1). Catalytic hydrogenation of 1 leads to consecutive opening of the two cyclopropane rings to give C2-bisseco-octahedrane (pentacyclo[6.4.0.0(2,6).0(3,11).0(4,9)]dodecane) 16 as the major product. Although 1 is highly strained, its carbon skeleton is kinetically quite stable: Upon heating, 1 does not decompose until above 180 degrees C. The B3LYP/6-31G* barriers for the S(R)2 attack
(CH)12烃[D(3d)]-八面体(七环[6.4.0.0(2,4).0(3,7).0(5,12).0(6,10)的合成。描述了0(9,11)]十二烷)1及其保留烃笼的选择性官能化。B3LYP / 6-311 + G *应变能为1时为83.7 kcal mol(-1)(每个CC键4.7 kcal mol(-1)),显着高于结构相关的(CH)16 [D( 4d)]-十面体2(每个CC键为75.4 kcal mol(-1); 3.1 kcal mol(-1))和(CH)20 [I(h)]-十二面体3(51.5 kcal mol(-1); 1.7每个CC键的kcal mol(-1)); 根据同渗方程计算的1-3的形成热分别为52、35和4 kcal mol(-1)。1的催化加氢导致两个环丙烷环的连续打开,从而得到C2-双seco-八面体(五环[6.4.0.0(2,6).0(3,11).0(4,9