For 10 points, name this compound which contains three benzene rings attached to a central atom.
Water and this compound are used in a reaction which releases nitrogen as azides are converted to primary amines. The azides required for that reaction can be produced in a reaction in which this compound is used with diethyl azodicarboxylate to convert alcohols to esters or azides. Those reactions are named after Staudinger and Mitsunobu. Like dimethylsulfide, this compound can be used to form aldehydes and ketones without producing carboxylic acids during the work-up step of ozonolysis. Perhaps most famously, this compound is used to prepare a reagent which later attacks a (*) carbonyl compound to form a z-alkene. In that reaction, this compound is reacted with an alkyl halide and then a base, forming the ylide used in the Wittig reaction. For 10 points, name this compound which contains three benzene rings attached to a central atom.
Water and this compound are used in a reaction which releases nitrogen as azides are converted to primary amines.
Triphenylphosphine