I ethyleneglycol

Scheme 12 The MIP-catalyzed dehydrofluorination reaction developed by Shea et al Reagents and conditions (i) ethyleneglycol dimethacrylate (EGDMA), methyl methacrylate (MMA), azobisisobutyronitrile (AIBN), and dimethylformamide (DMF).

Successful results have been obtained (Renfrew and Chaney, 1946) with ethyl formate methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec.-butyl and iso-amyl acetat ethyleneglycol diacetate ethyl monochloro- and trichloro-acetates methyl, n-propyl, n-octyl and n-dodecyl propionates ethyl butyrate n-butyl and n-amyl valerates ethyl laurate ethyl lactate ethyl acetoacetate diethyl carbonate dimethyl and diethyl oxalates diethyl malonate diethyl adipate di-n-butyl tartrate ethyl phenylacetate methyl and ethyl benzoates methyl and ethyl salicylates diethyl and di-n-butyl phthalates. The method fails for vinyl acetate, ieri.-butyl acetate, n-octadecyl propionate, ethyl and >i-butyl stearate, phenyl, benzyl- and guaicol-acetate, methyl and ethyl cinnamate, diethyl sulphate and ethyl p-aminobenzoate. 

Coupling of an aryl 1-S-cellobioside to an affinity carrier was therefore expected to be useful in the chromatographic fractionation of endo and exo enzymes, e.g., from Tr. r. Preliminary tests indicated that CBH I and CBH II (prepurified by ion-exchange chromatography) were completely retained by the affinity support (4 -aminobenzyl 1-S-cellobioside coupled to Affigel-10 from Biorad). Desorption was achieved differentially by 0.1M lactose (elutes CBH I) and 0.01M cellobiose (elutes CBH I and CBH II). Attempts to elute the enzymes with 1M KC1, ethyleneglycol or glucose solutions were unsuccessful (11). 

These results show a maximum deviation of -3 per cent to ethyleneglycol dinitrate, or 0.0008 in refractive Index from the straight line connecting the 100 per cent values. They also represent a maximum deviation of i 2 per cent, or 0.0005 from any of the points by which die curves were determined. The values at 15°C came the neatest to giving a smooth curve passing through all points, and this may be considered the optimum temperature at which to work... 

In order to improve such a work-up, two concave pyridines 3 have been attached to a polymeric back-bone in order to recover the concave base by simple filtration. A spacer has been attached to the convex outside of the pyridine 3, i.e. in 4-position of the pyridine ring. As spacer, an ethyleneglycol unit was chosen because the spacer should not be too long to avoid a folding of the hollow cave of the concave pyridine onto the polymeric backbone. On the other hand, a spacer reduces interactions between the backbone and the concave pyridine and enhances partial solvation. 

CA 73, 79082s (1970) [Low-density colloidal Dynamite was prepd by mixing 0.02— 3% of a mixt of (30 70)—(80 20) poly(oxyethylene) alkyl ally I ether—poly ethyleneglycol mono-stearate. The setting point was <30°, and thus the mixing proceeded easily]... 

Platinum(II)15 and palladium(II)16 complexes of phosphorus trichloride undergo solvolysis in water and alcohols to form complexes with orthophosphorous acid or orthophosphite ligands (equation 6). Similar reactions occur between the palladium(II) phenyldichlorophosphine complex (8) and the diols ethyleneglycol and catechol, but new chelate rings are not formed (Scheme 2). Solvolysis also occurs with attack of diphenylphosphinic acid or a similar diphenylchlorophosphine complex (9) (equation 7). The palladium complexes (8) and (9) are unstable to excess methanol, water or base and undergo reduction. Similarly, the phosphorus trichloride gold(I) complex (10) is reduced by water, but forms stable products on reaction with alcohols (equation 8).15 During the above reactions, the phosphorus—metal bond remains intact and the overall process is one of substitution at phosphorus. 

Two other polyaminopolycarboxylic acids, i,2-6is-[2-di(carboxy-methyl)-aminoethoxy]-ethane (EGTA) and 2,2,- s-[di(carboxymethyl)-amino] - diethyl ether (EEDTA) also known as ethyleneglycol-6is(2-aminoethyl)ethertetraacetic acid and bis-(2-amino ethyl)ethertetraacetic acid respectively (see the structural formula below) have also been investigated. The stability constants (ju = 0.1 at 20° C) of both the EGTA and EEDTA complexes were measured [463] by polarographic... 

When the viscosity of the solution increases by using ethyleneglycol or glycerol water mixtures as solvent, the rotational correlation time increases. This determines (1) higher relaxivity values at low frequencies (2) a shift toward lower frequencies of the a>s dispersion (3) the appearance of a second dispersion (ascribed to the a>i dispersion) at high fields. Temperature dependence studies show that the observed rates are not controlled by exchange, but arise from variation of the rotational correlation time. 

Conventionally, MlPs are obtained by bulk co-polymerization from a mixture consisting of a functional monomer, cross-linker, chiral template, and a porogenic solvent mixture. Nowadays, imprinting via non-covalent template binding is preferred over the covalent mode and involves three major steps (see Fig. 9.9). (i) Functional monomers (e.g. methacrylic acid, MAA) and a cross-linker (e.g. ethyleneglycol dimethacrylate, EDMA) assemble around the enantiomeric print molecule, e.g. (S)-phenylalanine anilide (1), driven by non-covalent intermolecular interactions, e.g. ionic interactions, hydrogen bonding, dipole-dipole interaction. Tr-rt-interaction. (ii) By thermally or photochemi-... 

Seille, J.M. Delattre, L. Meurice, L. Jaminet, F. Etude de I effet d une sterilisation a I oxide d ethylene sur les teneurs residuelles en chlorhydrine du glycol et en ethyleneglycol dans des articles medico-chirurgicaux a base de PVC, prea-lablement irradies au cobalt 60. J. Pharm. Belg. 1985,40 (4), 213-221. 

Fig. 2. Continuous recording of the limiting current Oxidation of threo-1,2-diphenyl-ethyleneglycol by periodate. [Decrease in the periodic acid concentration with time. 1m Acetate buffer of pH 4-3, 5 x 10 5m-KIO4, 5x10 5m diol. Current recorded at — 0-4 V (mercurous sulphate reference electrode) at 25°C. Figures on the abscissae give the time in minutes the galvanometer zero and the current before the addition of periodate and after addition at i = 0 are marked. Full scale sensitivity 0-8 pA.] (Redrawn not accurate to scale.)...

Ethyleneglycol Diethylether, Glycol Diethyl-ether (GDEE), 1,2- Di ethoxy ethane (called in Lange Diethyl Cel lose I ve),... 

---