Tetralin signals

Tetrahydroanthracene is the linear benzologue of Tetralin. This compound behaves identical to Tetralin in the presence of dibenzyl with respect to ring contraction, giving a single methyl signal at 19.6 ppm (Figure 5). Contrary to... 

Figure 8-(a) and (b) show the decoupled signals of a-CH protons in tetralins and indans, respectively. The decoupled signals at 2.76 ppm in (a) and at 2.90 ppm in (b) correspond to a-CH protons of unsubstituted tetralin and indan, respectively. The result of decoupling of Figure 8 indicates the existence of several types of orChL protons which probably are located in substituted tetralin and indan. For example, the triplet at 3.10 ppm was decoupled completely by the irradiation on the pentuplet signals at 2.05 ppm. 

Figure 8a. Decoupling effect on oc-CHg proton signals in Tetralin and its derivatives. Irradiation at 1.77 ppm.

Low viscosity and high viscosity oil blends are prepared in kerosene and analysed against standards prepared in kerosene. Oil blends prepared in decalin are analysed against standards prepared in decalin. Finally oil blends prepared in tetralin are analysed against standards prepared in tetralin. The instrument is calibrated and equilibrated prior to analysis and the radial torch adjusted to achieve maximum signal response. Standard pump speed, gas flow rate and rinse out times are set as per manufacturer s instruction selecting the most sensitive line for each metal. Each sample is read six times allowing a 2 min wash out time between each measurement to remove memory effects. Extraction unit is switched on at full power to remove any toxic metal ions and vapours. 

Figure 7.9 Signal response for I ggmC1 Cu prepared in (a) carbon tetrachloride (b) chloroform (c) ethanol (d) glacial acetic acid (e) methyl isobutyl ketone (f) tetralin (g) toluene (h) water (j) xylene all using frequency 40 MHz, power 1.2 kW and 850 V PMT...

C10H11+ C5H7S2+ tetralins thioethylene ketals (together with isotope signal for 34 ) perfluoroalkyl derivatives... 

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