Front Cover; Advances in Physical Organic Chemistry Volume 43; Copyright Page; Table of Contents; Editor's Preface; Contributors to Volume 43; Chapter 1 Kinetic medium effects on organic reactions in aqueous colloidal solutions; 1 Introduction; 2 Self-aggregating amphiphiles; 3 Reactivity effects in aqueous colloidal solutions; 4 Kinetic models; 5 Hydrotropes and organic reactivity; 6 Micelles and organic reactivity; 7 Vesicles and organic reactivity; 8 Conclusions and future directions; Acknowledgments; References; Chapter 2 Photoremovable protecting groups based on photoenolization

1 Introduction2 Photoenolization; 3 Photorelease via photoenolization; 4 Conclusion; Acknowledgments; References; Chapter 3 The chemistry of reactive radical intermediates in combustion and the atmosphere; 1 Introduction; 2 Basic concepts of combustion chemistry; 3 Reactive radical intermediate chemistry in combustion; 4 Future challenges in combustion chemistry; 5 Conclusions; Acknowledgments; References; Chapter 4 Stable carbocations and onium ions from polycondensed aromatic and heteroaromatic compounds as models for biological electrophiles and; 1 Introduction; 2 Protocols

3 Pyrenium ions4 Phenanthrenium ions; 5 Benzanthracenium ions; 6 Chyrsenium and benzo[c]phenanthrenium ions; 7 Carbenium ions and onium cations from hetero-PAHs; 8 Carbenium ions derived from nonalternant PAHs; 9 Miscellaneous systems; 10 Concluding remarks; Acknowledgement; References; Chapter 5 Structural and biological impact of radical addition reactions with DNA nucleobases; 1 Introduction; 2 Hydroxyl and nitrogen dioxide radicals; 3 Alkyl radicals; 4 Aryl radicals; 5 Phenoxyl radicals; 6 Summary; Acknowledgments; References; Chapter 6 Recent studies of persistent carbodications