1,1,4,7,7-pentamethyldiethylenetriamine PMDT

A similar example is given by Whitney et al. [420] who have shown that addition of 1,1,4,7,7-pentamethyldiethylenetriamine (PMDT) even produces sufficiently conductive solutions of Hthium salts in toluene, in which the lithium salts are scarcely soluble. 

The dimethylaurate(I) anion was more readily isolated (9) when the lithium ion was complexed with pentamethyldiethylenetriamine (PMDT) [Eq. (2)]. The greater thermal stability of these complexes compared with their phosphine analogs was explained in terms of less-ready ligand dissociation and complexation of the lithium ion, preventing its attack at the gold center. 

N,N, N",N"-Pentamethyldiethylenetriamine CAS 3030-47-5 EINECS/ELINCS 221-201-1 Synonyms Bis-[2-(dimethylamino)ethyl] methylamine N-(2-Dimethylaminoethyl)-N,N, N -trimethyl-ethane-1,2-diamine Pentamethyidiethylenetriamine N,N,N, N, N"-Pentamethyldiethylenetriamine PMDT Classification Nonaromatic amine Empirical C9H23N3 Formula [(CH3)2NCH2CH2]2NCH3 Properties Colorless to pale yel. liq. strong ammoniacal odor sol. in water, phosphoric acid, ethylene glycol, most aq. acids and bases m.w. 173.30 dens. 0.830 m.p. < 20 C b.p. 198 C flash pt. 53 C ref. index 1.4420 (20 C)... 

Crassous et al.177) studied the polymerization of ethylene using n-butyllithium in conjunction with the tertiary diamines TMEDA, TEEDA (tetraethylethylenedi-amine) and PMDT (pentamethyldiethylenetriamine). In contrast to the situation with TMEDA the rate of polymerization was found to show a first order dependence upon the complexed chain end concentration. Steric hindrance seems to prevent the dimerization of the chain ends. Examination of the n-BuLi. TEEDA complex by -NMR shows that the displacement to high field of the protons a to the lithium induced by complexation is much smaller with TEEDA than with TMEDA or PMDT. With [TEEDA] < [RLi] time-averaged signals were obtained showing that the exchange process... 

TMED tetramethylethylenediamine PMDT pentamethyldiethylenetriamine iso-HMTT tris- (0-dimethylaminoethyl) amine HMTP heptamethyltetraethylenepentamine OMPH octamethylpentaethylenehexamine Two examples of chelated organosodium compounds are shown in Figure 1. 

PMA. See Polymaleic acid Propylene glycol methyl ether acetate PMAA. See Polymethacrylic acid PMAA, sodium salt. See Sodium polymethacrylate PM acetate. See Propylene glycol methyl ether acetate PMDT. See N,N, N",N"-Pentamethyldiethylenetriamine PMM PMMA. See Polymethyl methacrylate PnB. See Butoxypropanol PO-dimsthylsiloxane-PO block copolymer CAS 161755-53-9... 

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