Sign up to receive a weekly email. Each will be a paragraph of plain text and a single chemdraw image. Researchers in organic synthesis will find this useful not only to broaden their knowledge on the plethora of reagents, but in many cases the reagent of the week may inspire or prove to be the serendipitous answer to a pressing reaction.

1. Nitrogen triiodide (NI3) (CAS: 13444-85-4)
2. Phosphoryl chloride (CAS: 10025-87-3)
3. Boron tribromide (BBr3) (CAS: 10294-33-4)
   
4. Ammonium thiocyanate (NH4SCN) (CAS: 1762-95-4)
   
5. Sodium nitrite (NaNO2) (CAS: 7632-00-0)