78889-37-9

Basic information

• Product Name: Benzene, 1,4-dimethoxy-2,5-bis(phenylethynyl)-
• CAS NO: 78889-37-9
• Molecular Formula: C24H18O2
• Molecular Weight: 338.406
• Mol File: 78889-37-9.mol
• Article Data: 6

Chemical Properties

• CAS DataBase Reference: Benzene, 1,4-dimethoxy-2,5-bis(phenylethynyl)-(CAS DataBase Reference)
• NIST Chemistry Reference: Benzene, 1,4-dimethoxy-2,5-bis(phenylethynyl)-(78889-37-9)
• EPA Substance Registry System: Benzene, 1,4-dimethoxy-2,5-bis(phenylethynyl)-(78889-37-9)

Safety Data

• Hazardous Substances Data: 78889-37-9(Hazardous Substances Data)

Upstream product

• 51560-21-5 1,4-diiodo-2,5-dimethoxybenzene 
• 536-74-3 phenylacetylene 
• 2674-34-2 1,4-dibromo-2,5-dimethoxybenzene 

Downstream Products

• 4346-64-9 selenoanisole 
• 1238892-27-7 C₃₄H₂₂O₂Se₂ 
• 78889-44-8 2,5-di(phenylethynyl)-1,4-benzoquinone 
• 1269604-52-5 C₂₆H₂₄O₄ 

Relevant articles and documents

BCl3-Induced Annulative Oxo- and Thioboration for the Formation of C3-Borylated Benzofurans and Benzothiophenes

BCl3-induced borylative cyclization of aryl-alkynes possessing ortho-EMe (E=S, O) groups represents a simple, metal-free method for the formation of C3-borylated benzothiophenes and benzofurans. The dichloro(heteroaryl)borane primary products can be protected to form synthetically ubiquitous pinacol boronate esters or used in situ in Suzuki–Miyaura cross couplings to generate 2,3-disubstituted heteroarenes from simple alkyne precursors in one pot. In a number of cases alkyne trans-haloboration occurs alongside, or instead of, borylative cyclization and the factors controlling the reaction outcome are determined.

The influence of crystal packing on the solid state fluorescence behavior of alkyloxy substituted phenyleneethynylenes

The study reports the solid state photophysical properties of a series of alkyloxy-substituted oligo(phenyleneethynylene)s, methoxy to hexyloxy, supported by a detailed analysis of molecular packing obtained from single crystal X-ray diffraction data. While the emission peaks are highly red shifted (by as much as 114 nm) in the solid state, all molecules exhibit similar absorption and emission in dilute solutions. The red shift is maximum in ethoxy and minimum in methoxy, while other crystalline films exhibit intermediate values. In the crystal structures, the spacing between the molecular pairs forming the J-aggregates is varied between 3.48 to 4.65 , with no systematic dependence on the chain length. The red shifted emission maximum is found to vary linearly with the spacing between the interacting molecules in the J-aggregate. Thus, the emission in the solid state is determined by the extent of dipolar coupling between the molecules, the alkyl chain length influencing the properties only indirectly. The Royal Society of Chemistry 2009.

Organic multilayer white light emitting diodes

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