Abstract: Steric effects in coordination of the new tripod ligand 1, 1, 1-tris (dimethylaminomethy1) ethane (TTN) and of l, l, l-tris (monomethylaminomethy1) ethane (TSN) have been investigated by the preparation and characterization of their zinc chloride and zinc bromide complexes. The stereochemistry of the complexes has been established on the basis of data from 'H nuclear magnetic resonance (nmr) spectroscopy, infrared ...