Bonding trends, general

Number of Valence Electrons General Bonding Trends Formal Charges Only Electrons Move, Not Atoms Major and Minor Resonance Forms... 

Another bond must be made because two adjacent atoms, C and O, have less than expected from the general bonding trends. This bond should go between those two atoms giving the structure ... 

As a start toward this, the Appendix gathers together important tools a p/fa chart, a bond-strength table, a list of sources and sinks, the electron flow pathways, trends, general rules, and other useful items. Continue to customize your toolbox with any valuable tools that you need. 

The selectivity for reaction at the less hindered carbon results from steric effects. The selectivity for reaction at a phenyl-substituted carbon of an aziridine has been proposed to result from coordination of the catalyst to the phenyl ring, but computational studies imply that the catalyst coordinates to the aziridine nitrpgen7 In any case, oxidative additions that cleave benzylic C-X bonds are generally favored over oxidative additions that cleave aliphatic C-X bonds, and the preferential insertion of CO into the phenyl-substituted C-N bond of the aziridine is consistent with this general trend. 

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