𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Rotational Energy Barrier of the Polarized Carbon–Carbon Double Bond in Quinophthalone

✍ Scribed by Issa Yavari; Mehdi Adib; Hamid R. Bijanzadeh; Majid M. M. Sadegi; Hossein Logmani-Khouzani; Javad Safari

Publisher
Springer Vienna
Year
2002
Tongue
English
Weight
72 KB
Volume
133
Category
Article
ISSN
0026-9247

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Rotational energy barrier of the polariz
Rotational energy barrier of the polarized carbon-carbon double bond in 3-(4-dimethylaminobenzylidene)pentane-2,4-dione
✍ Issa Yavari; Afsaneh Zonouzi; Rahim Hekmat-Shoar 📂 Article 📅 1998 🏛 Elsevier Science 🌐 French ⚖ 132 KB

A dynamic NMR effect is observed in the t H NMR. spectra of the title compound in the vicinity of 186 °C, and is attributed to restricted rotation around the polarized carbon-carbon double bond. The free energy of activation (A G\* ) for this process is 105 \_+ 2 k J mol "1 in nitrobenzene as a solv

The barrier to internal rotation around
The barrier to internal rotation around carbon-carbon double bonds in ketene mercaptals and aminals
✍ Gunilla Isaksson; Jan Sandström; Ingegerd Wennerbeck 📂 Article 📅 1967 🏛 Elsevier Science 🌐 French ⚖ 170 KB

Unusually low barriers to rotation around carbon-carbon double bonds have recently been reported by two groups (1,Z). The publication by Gompper and Schaefer (3) of the preparation of some nitroketene mercaptale and related compounds prompts us to give a preliminary report on the observation of low