Tetramethyl ethylene diamine

The viscometric findings of Young 1211 who investigated the effect of tetramethyl ethylene diamine (TMEDA) addition on the viscosity of butadiene capped lithium polystyryl solutions showed that the results did not agree with those expected on the basis of the reaction... 

The methylenetriimido sulfite dianion [CH2S(NtBu)3]2 is prepared by the treatment of [CH3S(NtBu)3] with methyllithium in the presence of TMEDA (A,A,A, A -tetramethyl ethylene diamine).177 The structure of [(TMEDA)2 Li2 H2CS(NtBu)3 ] (63) resembles that of 61 with the TMEDA ligands replacing the two THF ligands on each Li centre. 

Polyamine complexes of organolithlum compounds have been extensively studied (8). Recent work by Fontanllle et al (24) has shown that also in these systems two isomeric ion pair complexes can be formed. The spectrophotometrlc "ion pair probe" used was 9-propylfluorenylllthlum (PFl ,Li+), which was complexed with tetramethyl ethylene diamine (TMEDA), hexamethyl triethylene tetramlne (HMTT) and tetramethyl tetraaza cydotet-radecane... 

Nishimura and coworkers 29f> 297 described a novel method for the enzymatic synthesis of oligosaccharide derivatives employing an a-chymotrypsin sensitive linker. The synthesis of the water soluble GlcNAc-polymer 197, sensitive to a-chymotrypsin, is shown in Fig. 18-27. Oxazoline derivative 193 was coupled with 6-(N-benzyloxycarbonyl-L-phenylalanyl)-amino-hexanol-l (194) followed by N-depro-tection of the phenylalanine and subsequent condensation with 6-acrylamido caproic acid 195. De-O-acetylation gave the polymerizable GlcNAc derivative 196. Finally, copolymerization of acrylamide and monomer 196 in the presence of ammoniumper-sulphate (APS) and N,N,N, N -tetramethyl ethylene diamine (TMEDA) gave the... 

It is well known that alkali and alkaline earth cations are very difficult to complex due to the configuration of the rare gas electronic structure of these ions. Fortunately, some specific ligands are known, such as aprotic dipolar solvents (dimethylformamide, sulfolane, dimethylsulfoxide, N-methyl pyrolidone and so on), aminoxides, phosphinoxides, glymes and polyethylene glycols, crown ethers and cryptates, bidentate amines (tetramethyl ethylene diamine, 1,10 phenanthroline, etc. [14, 53, 61, 68]. 

AbA acrylated abietic acid, APS (NH4)2S20g, ARGET activators regenerated by electron transfer, t-BA tert-Butyl acrylate, CL e-caprolactone, DEAEMA 2-(diethylamino)ethyl methacrylate, DMAEMA iV,lV-dimethyl aminoethyl methacrylate, PEGMA polyfethylene glycol) methyl ether methacrylate, PMMAZO 6-[4-(4-methoxyphenyl azo)phenoxy]hexyl methacrylate, SBMA sulfobetaine methacrylate, St styrene, TEMED JV -tetramethyl ethylene diamine... 

Ccdalyst sohUion A NNN N -tetramethyl-ethylene-diamine (TEMED),... 

ISOELECTRIC FOCUSING IN pH GRADIENTS b. Polyacrylamide. The monomer is made up as follows NNN N -tetramethyl-ethylene-diamine (TEMED),... 

With tetramethyl ethylene diamine Cu (CH3)2N CH2CH2N(CH3)2 (2,4,6-CU 293 1.89 0p=2 K Gouy square planar coordination with cis configuration 74B40... 

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