Cyclam
![](/Images/godic/202501/07/Cyclam4700.png")
![Cyclam, recrystallised from chloroform and chlorobenzene twice](/Images/godic/202501/07/Cyclam,_2015-10-224700.jpg")
![Isomers of a square planar metal cyclam complex.](/Images/godic/202501/07/CyclamIsomers4700.png")
Cyclam (1,4,8,11-tetraazacyclotetradecane) is an organic compound with the formula (NHCH2CH2NHCH2CH2CH2)2. It is a white solid that is soluble in water. The compound is notable as a macrocyclic ligand, which binds strongly to many transition metal cations. The compound was first prepared by the reaction of 1,3-dibromopropane and ethylenediamine.