Theoretical amount of the

Note 4). It is possible to obtain 80-90 g. (63-70 per cent of the theoretical amount) of the pure tf-base-f-acid (anhydrous acid salt). 

Step 2 Choose one of the reactants and use the stoichiometric relation to calculate the theoretical amount of the second reactant needed for complete reaction with the first. 

E. Sodium Dimethylglyoximate.—To a solution of 75 g. of sodium hydroxide in 300 cc. of water is added, with stirring, 100 g. of dimethylglyoxime (Note 11). Heat is applied to effect solution (Note 12), and the mixture is filtered from any slight residue. The solution is poured while hot into 500 cc. of 95 per cent alcohol. After cooling to 50, with stirring, the crystals which form are filtered, then suspended in 150 cc. of alcohol and again filtered, and finally dried at 25° until the solid has no odor of alcohol (Note 13). The yield is 213—230 g. (81-88 per cent of the theoretical amount) of the octahydrate. 

Index value By experience and research, it has been found that to obtain the best results for an application, slightly more or less than the theoretical amount of the curative needs to be used. The value is obtained by evaluating the most important physical properties required for the application in which the product will be used. This is discussed further in Chapter 7, Section 7.1.4. 

The amount of electricity needed corresponds to the quantity of the reagents in the chemical reaction. The theoretical amount of the electricity can be calculate on the basis of numbers of electrons which are required to promote the reaction. The unit usually used is the coulomb or the Faraday per mole (F mol ) as previously shown. 

A soln. of 2-benzyl-4-cresol in toluene added gradually to a suspension of NaH in toluene, refluxed 30 min., and to the gently refluxing soln. so obtained / -dimethylaminoethyl phloride, dissolved in toluene, added dropwise —2-benzyl-4-tolyl-y3-dimethylaminoethyl ether. Y 89%.—In the case of phenols containing a basic function, only the theoretical amount of the chloride was used in order to minimize quaternary formation (p. 3795). (F. e. s. W. B. Wheatley, L. C. Cheney, and S. B. Binkley, Am. Soc. 71, 64, 3795 (1949).)... 

In many instances, there is more than one place in the molecule where alkylation can take place. This is true in the methylation of morphine to codeine, where an alcoholic hydroxyl, a phenolic hydroxyl, and a tertiary nitrogen are present. In such cases, it is necessary that only the theoretical amount of the alkylating agent be used or that special conditions be employed (cf. Codeine). 

Stoichiometric Yield, material planing productivity is normally calculated in terms of the stoichiometric yield. This is based on the reaction equation, which describes the chemical process in question in the form of an ideal model. It allows the calculation of the theoretical amount of the target product given the amount of the main educt chosen. The stoichiometric yield of the target product is the ratio of the actual amount produces to the theoretical amount expected [55]. The stoichiometric yield is calculated on one educt and is thus dependent on the substance chosen as the main educt. The... 

The endpoint of a titration is an experimentally estimated value, whereas the equivalence point corresponds to the theoretical amount of the titrant that is exactly equivalent to the amount of the analyte. The difference between the endpoint and the equivalence point should be minimized and is referred as the titration error. 

Reduction of Ketones to Secondary Alcohols. A variety of ketones are reduced by TUD, in an aqueous ethanolic solution in the presence of NaOH, to the corresponding secondary alcohol in good yield. Generally, reduction of ketones requires 1-3 equiv of TUD and 2-6 equiv of NaOH for example, dipropyl ketone gives heptan-4-ol (74%), benzophenone gives benzhydrol (100%), and 3-pyridyl phenyl ketone gives 3-pyridylphenylmethanol (100%). From the reaction mixture, almost theoretical amounts of the byproducts, sodium bisulfite and urea, are obtained. 

Theoretical amount of the H2 consumption is 304 m H2 t and the theoretical yield of water is 244.3kg-t (both less than Fe304-based catalyst by 19.7%). 

Chemometric approaches have been used to improve the reliability of quantitation for pharmaceutical mixtures. Chlorpropamide is a polymorphic antidiabetic drug. Thirteen binary mixtures of forms A and B were prepared and statistically analyzed by factor analysis programming [34]. Subsequent predictions of compositions were correlated with theoretical amounts of the two polymorphs and showed the value of the factor analysis programming approach which could have applications for in situ monitoring of the relative amounts of the different polymorphs. 

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