Organic Chemistry Answers

• Explain the accepted structure of benzene in terms of hybridisation, sigma and pi bonding, and delocalisation of electrons. Include examples of evidence (such as infrared, x-ray and thermochemical analysis) that support the structure of benzene as being very stable and regularly shaped. Include within your explanation why this evidence also disproves the originally suggested Kekulé structure for benzene, including reference to the bond lengths of C-C, C=C and those within benzene

1.  Draw the products of the following alkene reactions:

a. (E)-2-methylhex-3-ene + ozone, then Zn in acidic (H3O⁺) medium

b. 3-methylhex-1-ene + HBr in ether

c. (Z)-3-methylhex-3-ene + H2 with platinum catalyst

d. (R)-4-methylhex-1-ene in a hydroboration reaction

e. (Z)-3-methylhex-2-ene + KI in phosphoric acid

1.   How fast is the rate of effusion of N₂ compared to that of Cl₂?

2.   Under the same conditions of temperature and pressure, (a) how many times faster will methane (CH₄) effuse compared to Hydrochloric acid (HCl)? (b) If the Hydrochloric acid takes 25 sec to effuse, how long will the methane take? 

3.   A sample of gas occupies a volume of 200 mL at 25 atm. Calculate the new pressure if its volume is increased to 340 mL. (With a constant temperature)

I need to figure out the most stable structure of a specific compound with a detailed explanation.

Write the balanced chemical equation for the dissociation of β

β-hydroxypropanoic acid in water.

Draw the orientation of s,p and d orbitals

Multi step synthesis of n-ethylethamide from ethanoyl chloride, and then chloroethane? - to include start reagent, and reaction conditions, and and product. Thankyou

How to calculate calcium concentration in toothpaste. Please give me a method..

1.  Draw the products of the following alkyne reactions:

a.  4-methylpent-2-yne with a Li catalyst in ammonia

b.  4-methylpent-1-yne in a hydroboration – oxidation sequence

c.   Hex-1-yne in a mercury (II) catalyzed hydration

d.  Hex-2-yne + two equivalents of bromine in CH2Cl2 solvent

e.  Hex-3-yne + H2 with a Lindlar catalyst

Trovare quanti ml di una soluzione di LiOH 0.8M si devono aggiungere a 120ml di una soluzione di metilammina,CH3NH2 0.4M sapendo che questa base ha Kb=4*10^-5 perché la concentrazione deglio ioni CH3NH3+ risulti 3*10^-5M