Molecular containing platinum

Using low molecular urea-formaldehyde resins, Wright [6] selectively extracted mercury from mineral ore containing platinum, gold, palladium, titanium, molybdenum, copper, uranium, chromium, and zinc. 

Sulphur trioxide is difficult to analyse directly by GC because it is highly reactive and is eluted from the column in an asymmetric zone when separated directly [110], Bond et al. [Ill] proposed to convert sulphur trioxide, prior to chromatographic separation, into an equimolecular mixture of carbon monoxide and dioxide by reaction with oxalic acid. Nebbia and Belloti [112] offered a different solution to the same problem, viz., conversion of sulphur trioxide into carbon monoxide by reaction with sodium formate at 120°C. Diedrich et al. [113] converted reactive ammonia into nitrogen in a reactor containing platinum at 700°C. The resulting nitrogen was separated at 30°C on a column of molecular sieves 5A. 

Polymeric materials containing Pt-Pt bonds in their backbones have been examined by Puddephatt. The formation of low molecular weight platinum ohgomers (76) (Scheme 22) was achieved by reaction of complex 74 with diacetylides, diphosphines, or diisocyanides (75). These materials exhibited very poor solubilities in otganic solvents. 

We used polycrystalline films of ZnO and Sn02 as adsorbents. The films were deposited from the water suspension of respective oxides on quartz substrates. These substrates contained initially sintered contacts made of platinum paste. The gap between contacts was of about lO" cm. All samples were initially heated in air during one hour at T 500 C. We used purified molecular oxygen an acceptor particle gas. H and Zn atoms as well as molecules of CO were used as donor particles. We monitored both the kinetics of the change of ohmic electric conductivity and the tangent of inclination angle of pre-relaxation VAC caused by adsorption of above gases and the dependence of stationary values of characteristics in question as functions of concentrations of active particles. 

The synthesis, X-ray structure, NMR, and UV-visible spectroscopy, and electrochemistry of a macrocyclic platinum(II) complex containing the tetradentate 1,4,7,10-tetrathiacyclodecane ligand, [12]aneS4 (144) have been reported.350 Related complexes including [Pt([13]aneS4)]2+ and [Pt([16]aneS4)]2+ have also been prepared, and molecular mechanics calculations complemented... 

Catalytic hydrogenation with molecular hydrogen is by far the most favored option. It is carried out at temperatures between 20 and 120°C and at pressures between 10 and 100 bar in 2 to 10 m3 tanks, which are pressure and shock resistant. Catalysts typically contain nickel, which may in some cases be replaced by a precious metal, such as palladium or platinum. 

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