1,4-Diisocyanobutane is an organic compound. Its structural formula is CN(CH2)4NC, which similar to adiponitrile but with carbon and nitrogen of cyanide groups switching places. It has been used as a ligand in the formation of organometallic complexes, such as with rhodium - [Rh<sub>2</sub>(CNC<sub>8</sub>H<sub>14</sub>NC)<sub>4</sub>]2+.[1]