L,2-dimethoxyethane

Dioxolane-l, 2-dimethoxyethane-Li2 B1()C11() exhibited chemical stability towards the components of a lithium-titanium disulfide cell and showed promise as an electrolyte in such cells [98], Among various systems composed of an ether-based solvent and a lithium salt, THF-LiAsF6 was the least reactive to lithium at elevated temperature and gave the best cycling efficiency [99, 100], Tetrahydrofu-ran-diethyl ether-LiAsF(i afforded lithium electrode cycling efficiency in excess of 98% [101],... 

When Al, Pt, Ni, or Cu is used as the substrate of lithium plating with 1 mol L 1 LiC104- PC/l, 2 -dimethoxyethane (DME), Eff decreases in the order is Al > Pt > Ni > Cu [26]. Lithium is easily alloyed electrochemically with many metals [27] the Eff values measured in these experiments could include those of lithium alloys. 

The choice of solvent can also be beneficial in another respect. This possibility was highlighted by the findings of Cioffi on the Raney Nickel catalyzed hydrogen-deuterium exchange of a model carbohydrate [l-0-methyl-/l-D-galactopyranoside] but under ultrasonic irradiation (Tab. 13.2) [43], Extensive deuteration at C-4 position occurred for a series of ethereal solvents, the C-3 position was deuterated by seven solvent systems and the C-2 position deuterated less extensively, also by seven solvent systems. For l,4-dioxane-D20 no labeling at the C-2 position occurred and for l,2-dimethoxyethane-D20 no C-3 labeling was observed. 

The catalysed A/-alkylation of the potassium salt of sulphoximines in l, 2-dimethoxyethane produces yields in excess of 90% [48]. Similarly, azacrown ethers have been synthesized by alkylation of bis(tosyIamino)alkyl ethers under catalysed basic two-phase conditions [49] (Scheme 5.12). The yields of the cyclic products (Table 5.24) are influenced by the choice of the alkali metal hydroxide employed, suggesting that there is a degree of template control in the ring closure step. This is not the case in the analogous reaction of p-toluenesulphonamide with a, co-dihaloalkanes [50], which leads to the formation of a mixture of l l and 2 2 cyclic products... 

Bis(trifluoromethyl)cadmium-l,2-dimethoxyethane adduct, 0587 =1= Bis(trimethylsilylmethyl)magnesium, 3099... 

Ethyleneglycol Dimethylether (EGDME) or Glycol Dimethylether (GDME), also known as l,2>Dimethoxyethane or Dimethykellosolve,... 

C1C2Hj, Acetic acid, chloro-ruthenium complex, 26 256 02C1,WC,Hi, Tungsten(VI), trichloro(l,2-dimethoxyethane)(2,2-dimethylpro-pylidyne)-, 26 50... 

O2YbC 4H20, Ytterbium(II), bisfrf-cyclo-pentadienyl)(l,2-dimethoxyethane)-, 26 22... 

NiCi2H20N2O2 Bis(4-methyl-amino-3-penten-2-onato) nickel(ll), 11 74 [Ni(chxn)3] Br2, 14 61 [Ni(chxn)3] 12, 14 61 [NiCI2(C2H5OH)4], 13 158 [NiCI2(C4Hi0O2)] DichIoro(l,2-dimethoxyethane)nickel(II), 13 160... 

The present procedure for the preparation of d1-tert-buto yethyne is an improvement of a method previously reported by the submitters,6 who have also reported the preparation from glyoxal via l,2-dichloro-l,2-dimethoxyethane.6... 

Procedures for the preparation of nickel(II) chloride dihydrate and nickel(II) bromide dihydrate follow. From these, the preparation via the orthoformate ester dehydration route of the anhydrous tetrakis(ethanol) and 1,2-dimethoxyethane complexes is described. The preparation of nickel(II) iodide-bis(l,2-dimethoxyethane) from nickel(II) iodide pentahydrate is also given. 

Whether prepared from a homogeneous (excess ethanol is required) or a nonhomogeneous medium, the orthoformate derived dichloro(l,2-dimethoxyethane)nickel(II), on thermo-gravimetric analysis (heating at 10°C. min-1) begins to lose its ligand at 91°. The loss proceeds in two stages the first, 28%... 

Bis(l,2-dimethoxyethane)diiodonickel(II) begins to lose some of its dimethoxyethane in a nitrogen atmosphere even at ambient temperatures. This sample analyzed for 95% of the two liganded 1,2-dimethoxyethane molecules which were originally present. At 88°, this loss amounted to two more percent then, further increasing the temperature, the remaining 1,2-dimethoxyethane is volatilized up to 133°. The 34% loss (calcd. 36.6%) is accompanied by an intense endotherm at 109°, which is followed by a smaller endotherm at 135°. 

Through a rather complicated sequence of meanwhile fully understood reaction steps ethyl benzoate and lithium bis(trimethylsilyl)phosphanide form tris(l,2-dimethoxyethane-0,0 )-lithium 3-phenyl-l,3-bis(trimethylsilyl)-l,2-diphosphapropenide and 3,5-diphenyl-l,2-bis(tri-methylsilyl)-l,2,4-triphospholide. X-ray structure determinations on orange or green, metallically lustrous, crystals show the compoxmds to be ionic in the solid and to contain a 1,2-diphosphaallyl and a 2-phosphaallyl anion, respectively. Dark red tetrakis(tetra-... 

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