LUMO Energies and Orbital Coefficients

Data are also shown for allene and ketene derivatives, which react similarly to alkenes in pericyclic reactions. The HOMO and LUMO energies are generally lower than those of ethene and the orbital coefficients of interest are those at C2 and C3 in the LUMO of allenes and Cl and C2 in ketenes. As will be seen in Sections 11.4.B and 11.11, the LUMO energies and coefficients are important for predicting reactivity and selectivity in several types of pericyclic reactions. 

Figiure 11.3. Influence of a conjugating substituent on alkene HOMO and LUMO energies. 

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Table 11.1 HOMO and LUMO Energies and Orbital Coefficients of Common Alkenes...

Table 11.2 HOMO, LUMO Energies and Orbital Coefficients for Substituted Dienes...

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