Published 2021
Table of Contents:
“...-- Six-interstitial aromaticity-cap-ring interactions remove antiaromaticity -- Through-space aromaticity-stacking antiaromaticity away -- Möbius aromaticity-a topological escape from antiaromaticity -- Excited-state aromaticity-reversing the Hückel rule with light -- Makeable and usable antiaromatic compounds -- References -- Chapter 11 -- Cycloaromatization reactions -- Introduction-cycloaromatization reactions: making radicals without using radicals -- Unusual electronic features of cycloaromatization reactions -- Molecular orbital analysis of cycloaromatization reactions -- Ionic and zwitterionic cycloaromatizations -- Metal-catalyzed cycloaromatizations -- Five-membered heterocyclic diradicals -- Secondary aromaticity effects in cycloaromatization
processes -- Aromaticity: the effect of additional aromatic rings annealed to the
core -- Electronic control via direct reduction and oxidation of enediyne moiety -- Unusual electronic features of redox- and photo-activated cycloaromatizations: cyclo-RE-aromatization and activation of remote substituent effects via MO crossings -- Photochemical C1-C5 cyclization of enynes-an example of rearomatization-driven photoreaction -- Conclusions -- Acknowledgment -- References -- Chapter 12 -- Baird aromaticity in excited states and open-shell ground states -- Introduction -- Theoretical derivation of Baird's rule -- Assessing excited-state aromaticity
computationally -- Multidimensional character of aromaticity -- Geometric indices -- Energetic indices -- Magnetic indices -- Electronic indices -- Reactivity indices -- Illustrative applications -- Fulvenes and aromatic chameleons -- Expanded porphyrins -- Ground-state triplets -- Nonconventional aromaticity -- Concluding remarks and open challenges....
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