How Do Ethane-Type Molecules Avoid Eclipsing When Forced as Such? The Case of 7,8,9,10-Tetrachloro-1,1-dimethyl-1,2,6,10b-tetrahydro-6,10b-o-benzenoaceanthrylene
摘要:
标题化合物的分子结构是通过 X 射线晶体学确定的。为了避免 1 位上的两个甲基与三庚烯骨架之间的黯然作用,分子呈现出几种不同寻常的键长和键角。分子中的苯环也发生了平面变形。
How Do Ethane-Type Molecules Avoid Eclipsing When Forced as Such? The Case of 7,8,9,10-Tetrachloro-1,1-dimethyl-1,2,6,10b-tetrahydro-6,10b-<i>o</i>-benzenoaceanthrylene
The molecular structure of the title compound was determined by X-ray crystallography. To avoid the eclipsing interactions between the two methyl groups at the 1-position and the triptycene skeleton, the molecule exhibited several unusual bond lengths and bond angles. The benzene rings in the molecule were also deformed from planarity.
标题化合物的分子结构是通过 X 射线晶体学确定的。为了避免 1 位上的两个甲基与三庚烯骨架之间的黯然作用,分子呈现出几种不同寻常的键长和键角。分子中的苯环也发生了平面变形。
Syntheses and Structures of 1,1-Dimethyl-1,2,6,10b-tetrahydro-6,10b-<i>o</i>-benzenoaceanthrylenes: Sterically Congested Triptycenes Carrying Five-Membered Ring
compounds which carry a five-memberedring condensed to the triptycene skeleton were synthesized by the Diels-Alder reaction of 1,1-dimethyl-1,2-dihydroaceanthrylene with a benzyne. The structures of three compounds were determined by X-ray crystallography. The molecules have several abnormal bond lengths and angles in addition to significant deformation of the benzene rings as well as the triptycene
通过 1,1-二甲基-1,2-二氢乙酰蒽与苄的 Diels-Alder 反应合成了带有稠合到三苯乙烯骨架的五元环的空间压缩的标题化合物。三种化合物的结构通过 X 射线晶体学确定。除了苯环和三苯乙烯骨架的显着变形外,分子还有几个异常的键长和角度,以避免关于 C(1)–C(10b) 和 C(1)–C(2) 键的重叠构象. 7-10 位取代基的影响相当小,但在比较 C(10a)-C(10)-取代基键角时发现了一个有趣的键角变形。对二甲氧基化合物进行分子力学计算,以将计算结构与 X 射线结构进行比较。