Crystal Structure of 5-Ethyl-2-pyridylvinylbenzene

Abstract

The search for new materials possessing high nonlinear optical activities surpassing those of the materials already in the market was extensively pursued during the last decades due to their wide range of applications in secondand third-harmonic generation2, optical bistability3'4 and phase conjugation.5 We have been investigating the structures of a number of monomeric precursors having a central vinyl group and one side a pyridyl ring and on the other side an aliphatic chain, an aromatic or an heterocyclic ring, in connection with a project on solidstate polymerization and towards the electrooptical activity of these compounds. The crystal structure of 5-ethyl-2-pyridylvinylbenzene was studied in connection with the above-mentioned project. Details concerning the chemical synthesis and spectral data using IR and NMR techniques will be reported somewhere. The molecular structure of the title compound is shown in Fig. 2; it has a phenyl ring located at C7 trans to the Table 1 Crystal and experimental data Fig. 2 Molecular structure of the title compound with atom labeling. Thermal ellipsoids are drawn at the 50% probability level. Fig. 3 Perspective drawing of the packing arrangement of the title compound in the crystalline form.

X-Ray Crystal Structures of a 1-(p-fluorophenyl)-2-(α-pyridyl)ethanol Intermediate and the 1-(p-fluorophenyl)-2-(α-pyridyl)ethene Dehydration Compound Obtained from the Condensation Reaction of 2-Methylpyridine and p-Fluorobenzaldehyde

“…The bond lengths between C(5)-C(6) [1.471(10) Å], C(6)-C(7) [1.323(9) Å], and C(7)-C(8) [1.459(11) Å] ( Table 2) indicate a delocalization of the electrons of the two rings through the C(6)-C(7) bond. Similar distances have been observed in 2-styrylpyridine [6], 2,6-distyrylpyridine [7], and 5-ethyl-2-pyridylvinylbenzene [16]. Also compound II is a planar molecule with an r.m.s.…”