A compound containing this element and three alkyl groups reacts with an alkyl halide in the Michaelis-Arbuzov reaction, which forms esters of its namesake acid.
Carbon tetrachloride and a compound consisting of this element bonded to three cyclic groups is used to convert alcohols to alkyl chlorides in the Appel reaction; that same compound is used with DEAD in the Mitsunobu reaction. A compound containing this element and three alkyl groups reacts with an alkyl halide in the Michaelis-Arbuzov reaction, which forms esters of its namesake acid. Those aforementioned three cyclic groups are phenyl. Electrons from the carbonyl bond form a sigma bond with this element in the first step of the Wittig reaction, where its ylide is typically used. The bond between the carbon of a 3' sugar, an ion whose central component is this element, and the carbon of a 5' sugar forms its namesake -diester bond in DNA. This element has violet, red, black and white allotropes. For 10 points, identify this element with chemical symbol P.
Carbon tetrachloride and a compound consisting of this element bonded to three cyclic groups is used to convert alcohols to alkyl chlorides in the Appel reaction; that same compound is used with DEAD in the Mitsunobu reaction.
phosphorus [or P until it is read]