In one reaction, after a 
In one reaction, after a stannane is decomposed by azobisisobutyronitrile, one of these groups replaces a complex made of tin bound to sulfur, which is itself double bonded to a carbon. In another reaction, one of these groups is kicked off a namesake dianionic intermediate by O minus, and then proceeds to attack the carbonyl carbon of a non-enolizable aldehyde. Those are the Barton McCombie and Cannizzaro Reactions, respectively. DIBAL, a metallic one of these, and its super version, LiTEBH, are both great reducing agents. When an unsubstituted carbocation is alpha to a more substituted carbon, one of this (*) ion's namesake shifts is likely to occur. Knowing that this ion's neutral aspect's isotopes are protium, tritium and deuterium, for ten points, name this anion of hydrogen.
In one reaction, after a stannane is decomposed by azobisisobutyronitrile, one of these groups replaces a complex made of tin bound to sulfur, which is itself double bonded to a carbon.
hydrides [accept H-]