Article Abstract:
The reactivity and unique properties of the titanium silicalite TS-1 were investigated using calorimetric and adsorption methods. Experimental results showed the absence of the strong acid site found in HZSM-5 and the presence of only 0.07 mmol g(super -) of a -15.1 kcal mol(super -1) hydrogen-bonding site. Titrations with 2,6-lutidine revealed the same number of hydrogen-bonding sites with a lower enthalpy. The magnitude of these enthalpies suggests that the acceptor sites are hydrogen-bonding sites that are comparable in acidity to the strongest sites on silica gel. In addition, the porosity and small number of hydrogen-bonding sites allow TS-1 to adsorb hydrocarbons in the presence of water.
User Contributions:
Comment about this article or add new information about this topic:
Article Abstract:
A study was conducted on the electrochemical properties of a family of mononuclear rhenium(I) (ReI) complexes. These are the [Re(super I)(CO)3LX]n. L in this equation is equal to pby, phen and X = Cl, CN (n=0). The metal-metal-bonded dimeric complexes [(L)-(CO3)3Re-Re(CO)3(L)], where L is equal to bpy, phen were examined in aprotic media. Two one-electron peaks were observed at the cyclic voltammetry curve relative to a 0.5 mM [Re(CO)3bpyCl]acetonitrile solution at 25 degrees Celsius. The solvent did not affect the peak I kinetics of both chloride and cyanide complexes.
User Contributions:
Comment about this article or add new information about this topic:
Article Abstract:
A study was conducted to analyze a technique for preparing effective pore sizes of catalysts. The method supports an a priori description of relative pore sizes and can be utilized to examine different catalytic and absorbent systems. Molecular dimensions were determined using the Zindo molecular electronic structure programs. Results indicated the existence of the next effect that influences the shape selectivity of the exterior surface of the HZSM-5 structure.
User Contributions:
Comment about this article or add new information about this topic: