Zur Kenntnis der Hexaalkylbenzole. 3. Mitteilung. Über einen neuen Kohlenwasserstoff C₁₈H₂₄ (Hexaäthylidencyclohexan)

Abstract

The dehalogenation of hexa‐(α‐bromoethyl)‐benzene with magnesium and methanol furnished a new hydrocarbon C18H24 in 29% yield.

Planar [6]Radialenes: Structure, Synthesis, and Aromaticity of Benzotriselenophene and Benzotrithiophene

“…[9] [5]Radialenes, such as decamethyl [5]radialene, usually have a twistedenvelope or half-chair conformation. [10] In contrast to [3]-, [4]-, and [5]radialenes, [6]radialenes (of type 1) have a chair conformation, according to both experimental and theoretical studies. [1,2,11] Perylene and triphenylene may not be considered as radialenes, because the p electrons are delocalized over an aromatic sextet.…”

“…[1,2,6] Radialenes are also of considerable interest because of their exocyclic double bonds, aromaticity, and conjugation. [1, 2, 4a] The parent [3]-, [4]-, [5]-, and [6]radialenes polymerize at room temperature and are unstable in air; however, many stable derivatives are known. [1,2] It has been found experimentally that [3]- [7] and [4]radialenes [8] usually have a planar structure.…”

“…[1, 2, 4a] The parent [3]-, [4]-, [5]-, and [6]radialenes polymerize at room temperature and are unstable in air; however, many stable derivatives are known. [1,2] It has been found experimentally that [3]- [7] and [4]radialenes [8] usually have a planar structure. [9] [5]Radialenes, such as decamethyl [5]radialene, usually have a twistedenvelope or half-chair conformation.…”

“…[6]radialene, 1) are a relatively modern class of alicyclic hydrocarbons in which all carbon atoms in the ring are sp 2 hybridized and there are as many exocyclic double bonds as possible. [1,2] The first radialene, 7,8,9,10,11,12-hexamethyl [6]radialene, was prepared by Hopff and Wick in 1961. [3] Radialenes and their derivatives have been the subject of significant theoretical and experimental interest.…”

“…[1,2] The first radialene, 7,8,9,10,11,12-hexamethyl [6]radialene, was prepared by Hopff and Wick in 1961. [3] Radialenes and their derivatives have been the subject of significant theoretical and experimental interest. [1,2,4,5] New approaches to the synthesis of radialenes have been developed, and these structures have become important building blocks for organic conductors and ferromagnets.…”