Glove bag

Diethyl chlorophosphate, supplied by Aldrich Chemical Company, Inc., was used by the submitters without purification and was handled in a glove bag under an atmosphere of dry nitrogen in a well-ventilated hood. The reagent was distilled and stored under nitrogen by the checkers. Aliquots were withdrawn with a syringe as needed. 

Glove bags can be purchased from Instruments for Research and Industry, 108 Franklin Avenue, Chiltenham, Pa.19012. The 27 x 27 x... 

A stopcock and a drying tube were inserted into the hose between the glove bag and the aspirator. 

The other materials in the bag can be removed at this time, but the three-necked flask inserted through the side of the glove bag must not be removed. 

The procedure described above provides a sufficient quantity of bis[copper(I) trifluoromethanesulfonate] benzene complex for several reactions at the scale used in Part C. If bis[copper(I) trifluoromethanesulfonate] benzene complex for a single reaction is desired, the same procedure can be followed at the appropriate scale without the use of the glove bag. In this case, the decolorized solution is not filtered but instead is cooled, and the product is allowed to crystallize in the reaction vessel. The supernatant benzene is decanted, and the crystals are washed in the flask with fresh benzene. The bis[copper(I) trifluoromethanesulfonate] benzene complex is then used without drying hj the same flask. 

The XPS spectra of the freshly sulfided Co-Mo/NaY catalysts were measured on an XPS-7000 photoelectron spectrometer (Rigaku, A1 anode 1486.6 eV). The sample mounted on a holder was transferred from a glove bag into a pretreatment chamber attached to the spectrometer as possible as carefully not to be contacted with air. The binding energies (BE) were referenced to the Si2p band at 103.0 eV for the NaY zeolite, which had teen determined by the Cls reference level at 285.0 eV due to adventitious carbon. 

Toluene, the major solvent, was stirred for three days with several portions of sulphuric acid, washed, dried, and stored over calcium hydride on a vacuum rack. The toluene was distilled out immediately prior to the reaction. The dichlorides were vacuum distilled at the time of the reaction into three fractions, and the middle fraction, about 60% of the total, used. The dichlorides were obtained from Petrach, stored in a nitrogen glove bag and handled by syringe. 

Fig. 2.45 (a) Desorption curves at various temperatures under an initial hydrogen pressure of 0.1 MPa for MgH ABCR commercial powder which was stored under high-purity argon for almost a year but whose container was frequently opened in a plastic glove bag filled with argon, (b) The Arrhenius plot of the desorption rate for the estimate of the apparent activation energy, using kinetics data for three temperatures 350, 375, and 400°C -217 kJ/molH ). Coefficient of fit... 

This type of double-seal gave very good protection against O2. Fe(III) protoporphyrin IX was prepared after the method of Falk (10). The Fe(III) complex was converted to Fe(II) using the method oF Brault and Rougee (11) in the N2-H2 atmosphere glove bag. 

The oxidized cytochrome c and myoglobin were converted to the Fe(II) form by using a 10-fold excess of Na S2O4 and immediately desalting on a G-25 column in 0.05 M phosphate buffer at pH 7 in the N2-H2 atmosphere glove bag. 

The >>Na NMR experiments were performed on static samples and on a Bruker MSL—200 spectrometer. Dehydrated samples were evacuated at 350 C under shallow bed condition, cooled under vacuum (lO torr), stored in helium atmosphere and introduced into a sample cell in a glove-bag under helium atmosphere. 

Note (a) The quality of the yttrium tri-iso-propoxide solution is important to obtain good reactivity and selectivity. (Yttrium tri-iso-propoxide from Kojundo was used). In addition, yttrium tri-iso-propoxide should be charged into the flask under argon using a glove bag or in a glove box. 

The submitters obtained good yields without a glove bag, but the checkers encountered 30-40% yield reduction without this precaution. A dry box is also suitable. 

Because tris(dimethylamino)sulfon1um difluorotrimethylsilicate is very hygroscopic, it is best transferred in a dry atmosphere of nitrogen or argon (dry box or glove bag). 

The usual synthesis route first was to prepare europium or ytterbium hydride by heating the metals in approximately 1 atm H2 at 500° C. Ternary hydrides were then prepared by heating a compressed pellet containing a homogenous mixture of powders of europium or ytterbium hydride and the rarer platinum metal at 800° C for approximately 18 hr and in approximately 1 atm H2. Metals were handled in a glove bag in a protective atmosphere of argon the hydrides were handled in a nitrogen atmosphere. 

Caution. Lithium dispersion is a flammable, moisture-sensitive material. Manipulations should be carried out in a dry box or inert-atmosphere glove bag. 

In choosing an inert-atmosphere system, one should select a system commensurate with the job at hand. It makes no sense to invest thousands of dollars in a sophisticated dry box when an inexpensive glove bag might serve just as well. 

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