Zur Kenntnis der aromatischen Di- und Triepoxyde. 3. Mitteilung
作者:H. Hopff、H. Keller
DOI:10.1002/hlca.19590420718
日期:——
1. Das früher dargestellte 1,3,5-Tri-(epoxyäthyl)-benzol wurde auf abgeändertem Wege nochmals hergestellt, wobei neben der bereits beschriebenen Verbindung vom Smp. 64° ein höherschmelzendes Isomeres (Smp. 81,5°) erhalten wurde. Es wird gezeigt, dass es sich um die beiden möglichen Racemate handelt.
Vollmann et al., Justus Liebigs Annalen der Chemie, 1937, vol. 531, p. 1,38, 114
作者:Vollmann et al.
DOI:——
日期:——
Vollmann et al., Justus Liebigs Annalen der Chemie, 1937, vol. 531, p. 1,39, 114
作者:Vollmann et al.
DOI:——
日期:——
HARVEY, R. G.;PATAKI, J.;LEE, HONGMEE, ORG. PREP. AND PROCED. INT., 1984, 16, N 2, 144-148
作者:HARVEY, R. G.、PATAKI, J.、LEE, HONGMEE
DOI:——
日期:——
Haloacetylation-Driven Transformation of Sandwich Herringbone to Lamellar/Columnar Packing in Pyrene
作者:P. S. Salini、Shinaj K. Rajagopal、Mahesh Hariharan
DOI:10.1021/acs.cgd.6b00919
日期:2016.10.5
Pyrene-based materials possessing one-dimensional cofacial π–π stacked structural motifs with short interplanar distances can have favorable charge transport properties. In this work, we have realized the switching of sandwich herringbone to lamellar/columnar arrangement by introducing α-haloacetyl substituents in pyrene. Density functional theory calculations showed that the subtle difference in the charge distribution induced by the haloacetyl group plays an important role in regulating the cofacial stacking. Single-crystal X-ray structural analyses and quantum theory of atoms in molecules (QTAIM) analyses revealed the role of dihydrogen contacts, halogen interactions, and hydrogen bonding in extending the columnar/lamellar arrangement in three dimensions. Hirshfeld surface analyses showed γ (lamellar) and β (columnar) packing motifs indicating extensive π–π stacking interaction between pyrene units. Detailed structural analysis revealed a gradual decrease in the intermolecular π–π stacking distance (dπ–π = 3.39 Å) with increasing the polarizability of halogen atom, a characteristic interplanar distance observed in highly oriented pyrolytic graphite (dπ–π = 3.35–3.39 Å).