The compound [H2（teta）]2+·2Cl-·3H2O （teta=meso-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane）was synthesized and characterized by elementary analysis and the structure was determined by single-crystal X-ray diffraction.The crystal belongs to triclinic,space group Pī with a=7.8364（16）,b=8.3607（13）,c=9.4762（15）?,α=61.900（12）,β=78.970（16）,γ=80.008（16）°,V=535.06（16）?3,Z=1,ρcalc=1.277g/cm3,F（000）=226.The macrocylic tetraamine cation contains two protonated secondary amine N atoms and two secondary amine N atoms.The water molecules are distinguished by their inequality in structure formation.They are involved in different types of intermolecular hydrogen bonding in the crystal lattice.
