Cyclen

Cyclen
Names
	Preferred IUPAC name 1,4,7,10-Tetrazacyclododecane
	Other names Tetraaza-12-crown-4
Identifiers
CAS Number	294-90-6 ;
3D model (JSmol)	Interactive image; Interactive image;
ChEBI	CHEBI:37391 ;
ChEMBL	ChEMBL19880 ;
ChemSpider	58488 ;
ECHA InfoCard	100.102.391
PubChem CID	64963;
UNII	964584YO2O ;
CompTox Dashboard (EPA)	DTXSID60183621 ;
	InChI InChI=1S/C8H20N4/c1-2-10-5-6-12-8-7-11-4-3-9-1/h9-12H,1-8H2 Key: QBPPRVHXOZRESW-UHFFFAOYSA-N ; InChI=1/C8H20N4/c1-2-10-5-6-12-8-7-11-4-3-9-1/h9-12H,1-8H2 Key: QBPPRVHXOZRESW-UHFFFAOYAQ;
	SMILES N1CCNCCNCCNCC1; C1CNCCNCCNCCN1;
Properties
Chemical formula	C8H20N4
Molar mass	172.276 g·mol−1
Appearance	White solid
Melting point	110–113 °C (230–235 °F; 383–386 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Cyclen (1,4,7,10-tetraazacyclododecane) is a aza-crown ether with the formula (CH₂CH₂NH)₄. It is a white solid. Being structurally simple, symmetrical, and polyfunctional, cyclen has been widely investigated.^[1]

^ Lejault, Pauline; Duskova, Katerina; Bernhard, Claire; Valverde, Ibai E.; Romieu, Anthony; Monchaud, David (2019). "The Scope of Application of Macrocyclic Polyamines Beyond Metal Chelation" (PDF). European Journal of Organic Chemistry. 2019 (36): 6146–6157. doi:10.1002/ejoc.201900870. S2CID 201220297.

[1] Lejault, Pauline; Duskova, Katerina; Bernhard, Claire; Valverde, Ibai E.; Romieu, Anthony; Monchaud, David (2019). "The Scope of Application of Macrocyclic Polyamines Beyond Metal Chelation" (PDF). European Journal of Organic Chemistry. 2019 (36): 6146–6157. doi:10.1002/ejoc.201900870. S2CID 201220297.

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