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Trans-1,2-Diaminocyclohexane Structural Formulae V.1.svg
IUPAC name
Other names
1,2-Diaminocyclohexane; chxn
3D model (JSmol)
ECHA InfoCard 100.112.387
Molar mass 114.19 g·mol−1
Appearance Colorless liquid
Density 0.951 g/cm3
Melting point 14 to 15 °C (57 to 59 °F; 287 to 288 K)
Boiling point 79 to 81 °C (174 to 178 °F; 352 to 354 K) 15 mm Hg
Flash point 69 °C; 156 °F; 342 K
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

trans-1,2-Diaminocyclohexane is an organic compound with the formula C6H10(NH2)2. This diamine is a building block for chiral ligands that are useful in asymmetric catalysis.[1]

A mixture of cis- and trans-1,2-diaminocyclohexane is produced by the hydrogenation of o-phenylenediamine. The racemic trans isomer [1:1 mixture of (1R,2R)-1,2-diaminocyclohexane and (1S,2S)-1,2-diaminocyclohexane] can be separated into the two enantiomers using enantiomerically pure tartaric acid as the resolving agent.[2]

Oxaliplatin, a complex of R,R-diaminocyclohexane, is an important anticancer drug.

Derived ligands[edit]

Representative ligands prepared from (1R,2R)- or (1S,2S)-1,2-diaminocyclohexane are diaminocyclohexanetetraacetic acid (CyDTAH4), Trost ligand, and the salen analogue used in the Jacobsen epoxidation.


  1. ^ Cyrille Kouklovsky, Yves Langlois "(1S,2S)-1,2-Diaminocyclohexane" in Encyclopedia of Reagents for Organic Synthesis, 2003; John Wiley & Sons. doi:10.1002/047084289X.rn00145
  2. ^ Jay F. Larrow and Eric N. Jacobsen (2004). "(R,R)-N,N'-Bis(3,5-Di-tert-Butylsalicylidene)-1,2-Cyclohexanediamino Manganese(III) Chloride, A Highly Enantioselective Epoxidation Catalyst". Organic Syntheses. ; Collective Volume, 10, p. 96