Phosphonium salts and P-ylides
The present review collects and describes the literature on preparation, characterisation and applications of phosphonium salts and ylides, covering the timeframe between January and December 2017. The large number of reviewed references highlights the importance of these P-based derivatives in synthetic and non-synthetic applications. For the Reader's convenience, topics are organized to offer an introductory survey on the methods of preparation and characterisation of both types of compounds, followed by an analysis of applicative and curiosity driven research. Recent advances on synthesis and applications of phosphonium-based ionic liquids (PILs) are summarised in a dedicated section.