"Organic Reaction Mechanisms, 2005" is the 41st volume in this classical series. In every volume, the content is divided in the different classes of organic reaction mechanisms. An experienced team of authors compiles these reviews every year, so that the reader can rely on a continuing quality of selection and presentation. As a new service to the reader, all reaction mechanisms leading to stereospecific products are highlighted. This reflects the needs of the organic synthetic community with leads to chiral reactions.