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Chemistry Questions and Answers March 30, 2020

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(1) Predict the major organic product of these reactions. In some cases, the formula of the major product is supplied as a hint. Do not write mechanisms. C,H02 show stereochem MCPBA (a) (1) Ag(NH,) 2 OH OH (b) (2) H,0 2deoxyribose CH3 , H,C , (1) CH,MgI draw a chair (c) (2) H,0 H (d) Ph CH3 (1) NACN CN (e) (2) H2 Ni heat C H,0 (f) C,H1203 NAOH

1) If this guanosine was isotopically labeled at the 4 positions shown, draw the purine degradation products that receive those labels. Be sure that your answer shows where the 4 labels go (use asterisks, which can be typed away from the structure using the A tool and moved around) HO HO PO 2) If CMP was isotopelabeled at the 4 positions shown,

(a) Atomic emission spectra arise from electron transitions from higherenergy orbitals to lowerenergy orbitals. The blue line at 434.7 nm (Fig. 1) in the emission spectrum for mercury arises from an electron moving from a 7d to a 6p orbital. Mercury (Hg) 400 550 600 650 700 nm Wavelength, A (nm) (Fig. 1) Line emission spectrum for mercury (i) Give

Calculate the necessary amount of each reagent to obtain 1 g of aspirin in the next reaction, use the chemical equation involved in the processes with their respective stoichiometric coefficients. To 138 mg (0.001 mol) of salicylic acid in a dry reaction tube is added 0.1 mL of pyridine (just sufficient to dissolve it) while the tube rests in a

Draw the complete chemical equation of the following reaction, with all the products and by-products obtained To 138 mg (0.001 mol) of salicylic acid in a dry reaction tube is added 0.1 mL of pyridine (just sufficient to dissolve it) while the tube rests in a cold water bath. One-tenth milliliter of acetyl chloride (slight excess over 0.001 mol )