552299-26-0

Basic information

• Product Name: 1,4-bis[(4'-azidophenyl)ethynyl]benzene
• Synonyms: 1,4-bis[(4'-azidophenyl)ethynyl]benzene
• CAS NO: 552299-26-0
• Molecular Weight: 360.377
• Mol File: 552299-26-0.mol

Chemical Properties

• CAS DataBase Reference: 1,4-bis[(4'-azidophenyl)ethynyl]benzene(CAS DataBase Reference)
• NIST Chemistry Reference: 1,4-bis[(4'-azidophenyl)ethynyl]benzene(552299-26-0)
• EPA Substance Registry System: 1,4-bis[(4'-azidophenyl)ethynyl]benzene(552299-26-0)

Safety Data

• Hazardous Substances Data: 552299-26-0(Hazardous Substances Data)

Upstream product

• 540-37-4 p-aminoiodobenzene 
• 75867-39-9 4-trimethylsilylethynyl aniline 
• 14235-81-5 4-Ethynylaniline 
• 246141-52-6 4,4’-(1,4-phenylenebis(ethyne-2,1-diyl))dianiline 

Relevant articles and documents

Limits of delocalization in through-conjugated dinitrenes: Aromatization or bond formation?

(Matrix presented) Dinitrenes 4 and 5 both can form quinonoidal structures by conjugative bond formation. However, ESR spectroscopy detects a thermally populated, excited-state, triplet quinonoidal structure only for 4, with a zero-field splitting of |D/hc| = 0.0822 cm-1, |E/hc| ? 0.0 cm-1. The tendency to maintain aromaticity in the additional ring of 5 favors a dinitrene structure (with one less formal π-bond) over a quinonoidal structure. The thermally populated quintet state of 5 has a zero-field splitting of |D/hc| = 0.287 cm-1, |E/hc| ≤ 0.002 c m-1.

Secondary face-to-face 2-2' β-cyclodextrin dimers linked with fluorescent rigid spacer arms: A cyclodextrin-based ratiometric sensor for bile salts

The synthesis of a series of β-cyclodextrin (CD) dimers in which the two macrocycle units are linked by rigid-rod phenylene-ethynylene tethers of different length and shape through the cyclodextrin secondary sides is reported. The synthesis involves Sonog