1 n-Nonane

Pirotta M, Renn A, Werts M FI V and Wild U P 1996 Single molecule spectroscopy. Perylene in the Shpol skii matrix n-nonane Chem. Phys. Lett. 250 576-82... 

Perhaps the most direct method of evaluating microporosity is to fill up the micropores with some suitable adsorbate whilst leaving the mesopores, macropores and external surface free. The use of n-nonane as a preadsorbate was proposed by Gregg and Langford on the basis of earlier work on the adsorption of n-alkanes C, to C, on ammonium phos-phomolybdate, a microporous solid. This work had shown that the rate at... 

Adsorption of nitrogen at 77 K on a microptorous carbon after pre-adsorption of n-nonane (cf. Fig. 4.13)... 

It would clearly be of interest to discover how far the nonane method can be used with adsorbates other than nitrogen. A study along these lines has been carried out by Tayyab, but a discussion of his rather unexpected results is best deferred until the role of fine constrictions has been considered (p. 228). Meanwhile it may be noted that the applicability of the technique seems to be limited to adsorptives such as nitrogen or argon which have negligible solubility in solid or supercooled liquid n-nonane. 

The experimental material was a sample of rutile on which a layer of tnicrocrystalline titania had been deposited. Isotherms of nitrogen were determined on the original material outgassed at 1S0°C and on samples that had been outgassed at 25°, 150° or 250°C respectively after being charged with n-nonane. 

Fig. 4J0 Adsorption isotherms on ammonium silicomolybdate powder. (I), (4). nitrogen at 77 K (2), (3), /t-hexane at 298 K. Isotherms I and 2 were measured before, and 3 and 4 after, pre-adsorption of n-nonane. Open symbols, adsorption solid symbols, desorption. (Adsorption is expressed in mm (liquid.)...

Fig. 4J2 Adsorption isotherms of carbon tetrachloride (at 298 K) on ammonium phosphotungstate compact, (1) before, (2) after preadsorption of n-nonane. (3) is the isotherm of nitrogen, after preadsorption, for reference. Open symbols, adsorption solid symbols,...

Example 21 Estimate the liquid density of n-nonane at 104.5 C and 6.893 MPa pressure. 

Benzoin, reaction with chloroform to give 1,1,3 tnchloro n nonane, 45, 104... 

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