853993-35-8Relevant academic research and scientific papers
Rotational isomerism involving an acetylenic carbon VI. Syntheses, structures, and dynamic stereochemistry of bis(1-phenyl-9-anthryl)ethynes: Highly restricted rotation about acetylenic axis in acyclic diarylethynes
Makino, Toshiaki,Toyota, Shinji
, p. 917 - 928 (2007/10/03)
Some sterically congested di(9-anthryl)ethynes with substituted phenyl groups (4-Me, 4-iPr, 4-tBu, 3-iPr, 3,5- iPr2) at the 1-positions were synthesized by the Stille coupling of the corresponding inf
Rotational isomerism involving an acetylenic carbon. Part 5: Restricted rotation about acetylenic axis in sterically crowded bis(1-phenyl-9-anthryl)ethynes
Toyota, Shinji,Makino, Toshiaki
, p. 7775 - 7778 (2007/10/03)
The title sterically crowded di-9-anthrylethyne derivative with 3,5- iPr2-phenyl groups at 1-position showed a barrier to rotation about the acetylenic axis of 18.0 kcal mol-1 based on a dynamic NMR study, which is an extr
