𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Polar Effects in the Addition of Alkyl Radicals to Olefins

✍ Scribed by Priv.-Doz. Dr. Bernd Giese; Dipl.-Chem. Jürgen Meister

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
198 KB
Volume
16
Category
Article
ISSN
0044-8249

No coin nor oath required. For personal study only.

✦ Synopsis

The presence of a negative partial charge on the benzylic carbon atom in the transition state (1) can be deduced from the experimentally determinable Hammett ϱ values. Alkyl radicals R^˙^ are accordingly seen to develop nucleophilic properties during addition to olefins.
equation image

📜 SIMILAR VOLUMES

Separation of polar and enthalpy effects
Separation of polar and enthalpy effects in radical addition reactions using polar (σ) and radical (σ ·) sigma scales
✍ Károly Héberger; Antal Lopata; J. Cs. Jászberényi 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 87 KB 👁 1 views

Rate constants (k) of radical addition reactions between 15 carbon-and sulfur-centered radicals and 15 vinyl-type alkenes were collected from the literature. Three descriptor variables {a polar (Hammett) sigma scale [s(H)] and two radical sigma scales as defined by Creary and co-workers [s Á (C)] an