Malthete, Jacques et al. published their research in Molecular Crystals and Liquid Crystals in 1973 | CAS: 39969-26-1

1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. But ether is more polar than alkenes. The unique properties of ethers (i.e., that they are strongly polar, with nonbonding electron pairs but no hydroxyl group) enhance the formation and use of many reagents. For example, Grignard reagents cannot form unless an ether is present to share its lone pair of electrons with the magnesium atom. Complexation of the magnesium atom stabilizes the Grignard reagent and helps to keep it in solution.Quality Control of 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene

Mesomorphic substances. III. Nematic tolans was written by Malthete, Jacques;Leclercq, Martine;Dvolaitzky, Maya;Gabard, Jacqueline;Billard, Jean;Pontikis, Vassilis;Jacques, Jean. And the article was included in Molecular Crystals and Liquid Crystals in 1973.Quality Control of 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene This article mentions the following:

p,p’-Disubstituted diphenylacetylenes p-ROC6H4CCC6H4R’p are prepared Sym. and nonsym. diethers (R’ = OR and R’ = OR”) and p’-alkylated monoethers are described. Most of these compounds are nematic at temperatures <50%. The temperatures and heats of transition and electrooptical characteristics (εâŠ?and εâ€? of the compounds are given. The preparation of mesomorphic mixtures at room temperature is discussed. In the experiment, the researchers used many compounds, for example, 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1Quality Control of 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene).

1-Methoxy-4-((4-propylphenyl)ethynyl)benzene (cas: 39969-26-1) belongs to ethers. Ether is less polar than esters, alcohols or amines because of the oxygen atom that is unable to participate in hydrogen bonding due to the presence of bulky alkyl groups on both sides of the oxygen atom. But ether is more polar than alkenes. The unique properties of ethers (i.e., that they are strongly polar, with nonbonding electron pairs but no hydroxyl group) enhance the formation and use of many reagents. For example, Grignard reagents cannot form unless an ether is present to share its lone pair of electrons with the magnesium atom. Complexation of the magnesium atom stabilizes the Grignard reagent and helps to keep it in solution.Quality Control of 1-Methoxy-4-((4-propylphenyl)ethynyl)benzene

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem