Cyclopropyl Homoconjugation, Homoaromaticity and Homoantiaromaticity—Theoretical Aspects and Analysis

1 Introduction 2 Definition of Homoconjugation and Homoaromaticity—Basic Considerations 3 Theoretical Aspects of Defining, Detecting and Describing Homoconjugation and Homoaromaticity 4 AB Initio Examinations of Homoconjugation 5 Conclusions and Outlook 6 Acknowledgements Keywords: cyclopropyl homoconjugation; homoaromaticity; from conjugation to cyclopropyl homoconjugation; Weinstein’s definition of homoaromaticity; PMO description of homoaromaticity; energy-based definitions of homoaromaticity