𝔖 Bobbio Scriptorium
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An Unrecognized Factor in Altitude Effects

✍ Scribed by Withrow Morse


Book ID
124756397
Publisher
American Association for the Advancement of Science
Year
1923
Weight
598 KB
Volume
17
Category
Article
ISSN
0096-3771

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Sigma-assistance, an unrecognized factor
✍ J. W. Verhoeven πŸ“‚ Article πŸ“… 2010 πŸ› Elsevier Science 🌐 English βš– 145 KB

## Abstract A simple perturbational frontier molecular orbital description with inclusion of sigma electrons is presented for bifunctional intramolecular reactivity. This description readily accounts for the preferred formation of odd membered rings in (di) radical cyclization and of even membered