Mercury-argon complexes

The highest value of c, 1 667, which is that predicted by the kinetic theory of gases, is observed only with monatomic gases (argon, mercury). Diatomic gases have the value 1 4, triatomic 1 3, and k decreases with increasing molecular complexity (cf. Chap. XVIII.). 

To a thin Pyrex tube were added several orange crystals (7 mg, 0.012 mmol) of EDA complex (1 -2(2)), and the tube was sealed under an argon atmosphere. The reaction tube was placed in a clear Dewar filled with acetone cooled to -60 °C and the sample irradiated with a medium-pressure mercury lamp fitted with an aqueous IR filter and a Corning cutoff filter to effect irradiation with visible light (A>410 nm). The tube was rotated each hour, and the temperature in the Dewar... 

Chromium and tungsten carbonyl complexes with 2-phenyl- (L) and 2-methylbenzo-l,3-tell-urazole (L ) were prepared in an argon atmosphere as follows. Cr(CO)6 (0.660 g, 3 mmol) or W(CO)6 (1.05g, 3 mmol) in 100 mL of dried THF saturated with argon was exposed to a mercury lamp until the evolution of 3 mmol of CO. After irradiation, the corresponding benzotellurazole (3 mmol) was added to the solution, and the mixture was stirred for 1 hr. The solution was filtered off, and the solvent was removed in a rotary evaporator. The solid residue was placed in a sublimation apparatus to remove unreacted metal carbonyl in a high vacuum and then recrystallized twice from hexane. 

In an atmosphere of argon, a solution of 13.5 g (88%, 94 mmol) of S.6b and 300 mg (11 mmol) of copper (I) trifluoromethanesulfonate benzene complex (CuOTf) in 120 mL of dry diethyl ether is irradiated in a Pyrex photoreactor with a water cooled quartz immersion well by a high-pressure mercury lamp (HPK 125 W, Fa. Philips). After the reaction is complete (monitored by GLC), the mixture is concentrated in vacuo and purified by column chromatography (cyclohexane/ethyl acetate 2 3) to give 10.5 g (64% from... 

Measurement of the mercury levels is not in itself the main issue firstly, it is important to obtain a sample, which is fully representative of the stream being examined without modifying it in any way. Secondly, the mercury present should be removed ficm its complex matrix and transferred into a stream of argon carrier gas. Passing the sample over a gold substrate, which collects all forms of mercury prior to revaporizing into a stream of argon, has been well... 

In a complex with more than one argon atom, we use the body-fixed system of axes illustrated in Fig. 2 for Hg- Ar2. The z axis is chosen along the R vector joining the mercury atom to the center of mass of the argons the x axis lies in the plane defined by the z axis and the first argon atom Ar(i). The quantization axis is the body-fixed z axis. The corresponding atomic basis set is denoted by L, A,5,E) or for Hund s case (c). For the Hg—Ar(ife)... 

A solution of the tricarbonyl(r -cyclopentadienone)iron complex (96.6 mg, 0.239 mmol) in acetonitrile (120 mL) is irradiated using a 150 W medium-pressure mercury lamp (Heraeus TQ 150, Pyrex filter) at -30 °C for 45 min with concomitant injection of argon into the solution. Then, air is injected into the cold purple solution for 5 min. Filtration through a short path of Celite, evaporation of the solvent, and flash chromatography of the residue on silica gel provides the free ligand as yellow needles mp 26.5-27 57.5 mg (91%). ... 

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