Monodentate coordination of the normally chelating chiral diamine (R,R)-TMCDA.

After isolating an unusual binuclear, but monosolvated NaHMDS complex [{(R,R)-TMCDA}·(NaHMDS)] which polymerises via intermolecular electrostatic NaMe interactions, further (R,R)-TMCDA was added to produce the discrete binuclear amide [{κ-(R,R)-TMCDA}·(NaHMDS){κ-(R,R)-TMCDA}], whose salient feature is the unique monodentate coordination of one of the chiral diamine ligands.