The objective of this book is to be a reference source. The mechanisms and products of the reactions are the same. Since students told me the mechanisms were easier to understand when written with pre-bonds, they have been retained. Because I believe that students can learn and understand better when they recognize patterns and principles, the reactions are organized by reaction mechanisms. The reactions within a chapter or on the same or next page, will be mechanistically similar. Therefore, even if you only wish to use the book as a reference, the chemistry is written so that it will be easier to detect similarities and differences in reactions.