Organic Chemistry Answers

describe using the language of the unit, the structure of the polysaccharide,Linear Mannan

Show two different ways to make an epoxide from a trans alkene, one that gives the trans epoxide and one that give the cis epoxide.

Oxidation of a primary alcohol containing an aromatic ring as a substituent to an aldehyde. State what is important about the reaction conditions to stop at the aldehyde.

Rank each of the following groups of substrates in order of decreasing S_N2 reactivity.

a.        CH₃CH₂CH₂Cl, CH₃Cl, (CH₃CH₂)₂CHCl

b.        (CH₃)₂CHCH₂CH₂Br, (CH₃)₂CHCH₂Br, (CH₃)₂CHBr

c.         CH₃CH₂Cl, CH₃CH₂I, (CH₃)₂CHCl, CH₃CH₂Br

1. (a) Use the Arrhenius equation to calculate the ratio of the rate constants k for the hydrogen abstraction in methane with a chlorine atom and with a bromine atom at 25^oC. Assume the A values for the two reactions are the same, and use E_a = 4 kcal/mol for chlorination and E_a = 19 kcal/mol for bromination.

(b) The high selectivity of radical bromination towards secondary and tertiary C-H bonds disappears if equimolar mixture of Br₂ and Cl₂ are used. The selectivity of the bromination between alkanes and the mixture of Br₂ and Cl₂ is very similar to the selectivity of chlorination. Explain this phenomenon.

configurational isomers

Reaction for 2-bromopentane+ NH3

Km of Hexokinase enzyme for the glucose is 0.15 mM and Glucokinase is 2 mM”. Discuss this statement in terms of the significance of glucose metabolism. 

When a 25 mL aqueous solution that contains 62.50 g of the salt is treated with NaOH, the salt is 

converted to pure cocaine. How much water (in litres) is needed additionally to dissolve the formed 

pure cocaine? Round your final answer off to two decimal points.C17H21O4NHCl(aq) + NaOH(aq) → C17H21O4N(aq) + H2O(l) + NaCl(aq)

I need the schemes and names of the following reactions:

• Alpha-D-galactopyranose with methanol (in the presence of HCl gas)
• Beta-D-ribofuranose with ethylamine
• Oxidation of D-mannose by: a) Cu(OH)2; b) bromine water; c) diluted nitric acid