Specific rotation table

The properties of a number of sugars are coUected in Table 111,139 the specific rotations in water are included for reference purposes. 

Fohc acid (1) is found as yellow, thin platelets which char above 250°C. The uv spectmm of L-foUc acid at pH 13 shows absorptions at A = 256 nm (e = 30, 000), 282 nm (e = 26,000), and 365 nm (e = 9800). FoHc acid has a specific rotation of [a] = +19.9 (c = 1, 0.1 NNaOH). Solutions of fohc acid are stable at room temperature and in the absence of light. It is slightly soluble in aqueous alkaU hydroxides and carbonates but is insoluble in cold water, acetone, and chloroform. Table 3 Hsts some physical properties of selected fohc acid derivatives. 

Infrared spectra and the degree of specific rotation show typical features of the malic acid polyester (Table 3). Ultraviolet absorbance spectra of )3-poly(L-malate) from both P. polycephalum and Aureobasidium sp, A-91 are similar and are reminiscent of malate itself [4,5]. For a solution of 1.0 mg/ml polymer, absorbance increases from 0.40 units at 230 nm to 10 units at 190 nm wavelength. After saponification and pH-neutralization, the absorbance increased from 8.7 units at 230 nm to 100 units at 190 nm. 

Table 9.1 Specific Rotation of Some Organic Molecules...

Moore, Stanford, 1030 Morphine, biosynthesis of, 969 specific rotation of, 296 structure of, 64 MR1, see Magnetic resonance imaging. 468-469 mRNA, see Messenger RNA MS, see Mass spectrometry Mullis, Kary Banks, 1117 Multiplct (NMR), 460 table of, 462... 

SN1 reaction and, 379-380 Sjvj2 reaction and, 370-371 Sorbitol, structure of, 992 Spandex, synthesis of, 1214 Specific rotation, 295 table of, 296... 

The structures of these bases have been established mainly on the grounds of their physicochemical data and have been confirmed by synthesis. In Table II the melting points, specific rotations, absolute configurations, and IR and UV spectral features are collected. 

The following Tables constitute a list of most of the known, characterized derivatives of sucrose. The names of the solvents used for measuring the specific rotations are abbreviated as follows A, acetone C, chloroform Dm, dichloromethane E, ethanol M, methanol Mf, N,N-dimethylformamide P, pyridine and W, water. 

The specific rotations of the plane of polarized light of solutions of the so-called laevo-rotary malic acid and its sodium salt change with increasing dilation from being dextro-rotary to being laevo-rotary, as may be seen from the data of Woringer1 and of Thomsen2 in table 1. 

In this table C is number of grams of solute per 100 cc. of solution, M is the number of mols of solute in 1000 cc. of solution and (a)D is the specific rotation calculated from the equation... 

The injection-molding press was producing a part and runner system that had a mass of 2.15 kg. The mass was plasticated using a 120 mm diameter, 8L/D screw. The screw used for the process had a barrier melting section that extended to the end of the screw, as shown by the specifications in Table 11.9. That is, the screw did not have a metering channel. Instead, the last sections of the barrier section were required to produce the pressure that was needed to flow the resin through the nonreturn valve and into the front of the screw. The specific rotational flow rate for the screw for the IRPS resin was calculated at 9.3 kg/(h-rpm) based on the depth of the channel at the end of the transition section. The screw was built with an extremely low compression ratio and compression rate of 1.5 and 0.0013, respectively. For IRPS resins and other PS resins, screws with low compression ratios and compression rates tend to operate partially filled. The compression ratio and compression rate for the screw are preferred to be around 3.0 and 0.0035, respectively. The flight radii on the screw were extremely small at about 0.2 times the channel depth. For IRPS resin, the ratio of the radii to the channel depth should be about 1. 

Although no complete investigations of the structure of the blood group substances have yet been reported, it is evident from the information available that all the material so far studied is predominantly carbohydrate in nature, and, as can be seen from Table III, preparations from widely different sources have many properties in common, for example, elementary analysis, specific rotation and the like. It is of interest to note that almost all the substances obtained from nonhuman sources display blood group A or blood group O activity, while human material is the most convenient source of the blood group B substance. The majority of the work carried out so far has dealt with blood group A substances. 

The following Tables list the aldose oxirane derivatives that have been prepared. The solvents used in determination of the specific rotation are given by A, acetone C, chloroform E, Ethanol E.A., ethyl acetate M, methanol P, pyridine and W, water. 

In Table II are given the melting point, boiling point, and specific rotation of the 2,5-anhydrides of sugars, alditols, and aldonic acids that have thus far been studied. 

TA NaBr-MRNi has been found to be an effective catalyst for enantio-differentiating hydrogenations of ketones which have a general structure of R—CO—CH2—X—O— as shown in Table XVII (52c) and methyl ketones as shown in Table XXVI (52d). Among all, /i-diketones and /i-ketoesters are the most favorable substrate for this catalyst. Specific rotations [a] 0 of (R, R )-diols produced from /3-diketones by hydrogenation with this catalyst are summarized in Table XXVII (44). 

Both spectra were almost mirror images of one another as expected from their opposite rotations. The relative intensities of the peaks were nearly proportional to the ratio of the specific rotations. The peaks at 208 and 232 nm may be assigned to the absorptions of the phenyl and ester groups, respectively. The spectral pattern is very similar to that of the copolymer 9 of TrMA with a small amount of (S)-a-methylbenzyl methacrylate illustrated in Figure 5. This also indicates that the large positive rotations of the copolymers 7-9 in Table are attributed to the helical conformation of isotactic TrMA units preferential in one screw sense. 

The optical properties of the components of petroleum have been of major importance in connection with their identification and in the determination of purity. The primary effort has been directed to the study of pure hydrocarbons and only limited work has been concerned with the prediction of the index of refraction and the specific rotation of hydrocarbon mixtures. Table V summarizes the optical properties of a number of the principal components of petroleum. Only a few references to the optical properties of pure hydrocarbons of primary interest to the analyst have been included. Developments (9) in refractometers have materially increased the potentialities of the index of refraction measurements at atmospheric pressure as an analytical method. Consideration of the pertinent data in this field is beyond the scope of the present discussion. Reviews of developments in infrared (24, 26) and mass spectrometry (68) are available. 

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