Reaction prediction rules, summary

How can you keep straight all the rules about pericyclic reactions The summary information in Tables 30.1 to 30.3 can be distilled into one mnemonic phrase that provides an easy way to predict the stereochemical outcome of any pericyclic reaction ... 

F Summary of Rules for Predicting Thermally Feasible Pericyclic Reactions... 

In summary, the regiochemistry of E2 reactions can be predicted by using the following rules ... 

How cun you keep straight nil the rules about pericyclic mactions The summary information in Tobies 30.1 -30.3 ran be disUHed into one mnemonic phras that proWdes an eaisy way to predict the stereochemical outcome of any perieyclic reaction"... 

Numerous examples of nucleophilic addition to n hydrocarbyl ligands exist.43 The regiochemistry of these additions to cationic metal complexes has been well studied and summarized by Davies, Green, and Mingos44 (DGM) as a set of rules. These rules can be used to predict where the nucleophile will add to a variety of tt-ligands when the reaction is under kinetic control. A summary of the rules follows. 

In summary, the PMO method when extended to photochemical reactions of the G-type predicts a reversal of aromatic properties from ground state to excited state. This justifies the set of rules for photochemical pericyclic reactions given above. Dougherty s analysis also reveals dangers in the use of orbital and state correlation diagrams for assessing photo-pericyclic reactions because the breakdown in the BO approximation leads to a destruction of symmetry. 

---