PMDETA, tridentate ligand

We were recently able to isolate and structurally characterize a series of [CuI(PMDETA)(7i-M][BPh4] complexes (M = styrene, methyl acrylate, methyl methacrylate, and 1-octene) [110,111]. Molecular structures of [Cu PMDETA) (71-methyl acrylate)] [BPhJ and [CuI(PMDETA)(7i-styrene)][BPh4] are shown in Fig. 5. In all complexes, PMDETA acted as a tridentate ligand, while the... 

Substituted terpyridine, 4,4, 4"-tris(5-nonyl)-2,2 <5, 2"-terpyridine (tNtpy), is a planar tridentate ligand that was successfully used in homogeneous ATRP of methyl acrylate and styrene [79]. Polymerization of both monomers was controlled and the resulting polymers had relatively low polydispersities (MJMn < 1.2). Similarly to PMDETA, the typical ligand to copper halide ratio used in the polymerization was 1 1. Terpyridine and its derivatives are expected to form tetra-coordinated complexes with copper in which the fourth coordination sphere is occupied by a monodentate ligand (Br-, Cl , solvent, monomer, etc.). Although,... 

A series of five-coordinate Fe(II) complexes were thoroughly studied with tridentate ligands, including triamines, like N,N,N, N",N"-p>entamethyldiethylenetriamine (PMDETA) (Fe-25, R=CH3), pyridylamine (Fe-26), N-aminoethyl-pyridylimine... 

Li+ centers. Attachment of three monodentate ligands [THF (73) and (74)], a tridentate one [PMDETA (70)], or a single 12-crown-4 [(84)—(86)] to Li+ also results in monomers. The bulk of these donors prevents association, even irrespective of the size of the amido R,R groups. Of course, Li+ is four or five coordinate. These features are seen in the structure of (70) (Fig. 40) although the amido R,R groups (Ph, naphthyl) are two dimensional, the PMDETA ligand prohibits any further association of the monomer. 

---