We report optimized synthetic procedures to cis-TMCDA and cis-cyclohexane-1, 2-diamine. Our new two-step approach is an efficient and low-cost method for synthesizing the ligand cis-TMCDA. In the preparation of cis-cyclohexane-1, 2-diamine, the crystallization of the unexpected intermediate cis-cyclohexane-1, 2-diammonium hydrogensulfate ethylsulfate made the subsequent reactions easier in their workup, as nickel (II) chloride impurities ...
