The present title “Organic Reactions” has been designed or under-graduate and post-graduate student of all Universities. We live and breed in a world that owes to organic chemistry many times more than organic chemistry owes to it. The domain of organic chemistry is to enormous that it defies the imagination of any individual, let alone mastering it in entirety. This is not a text book, but a reference book supplement to the text of organic chemistry meant for University students. However some advanced students may find the book inadequate.