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(a) Write the IUPAC names of the following structures:
(i) 1,3-dimethoxybicyclo[2.2.1]heptane
(ii) bicyclo[2.2.1]hept-5-en-2-one
Two stereoisomers of 1-tert-butyl-2-bromo-3-methylcyclohexane are shown below. These are referred to in the questions that follow.
(a) Draw the possible chair conformers for each of the above stereoisomers and indicate the more stable conformer in each pair by calculating total strain energy. [4 marks]
(b) Perform the ring flip for the most stable conformer for each structure and comment using relative energies of the chair conformations suggesting which form is more stable. [4 marks]
(c) If each stereoisomer is exposed to E2 elimination conditions, draw the structure(s) of the E2 elimination product(s) that may be obtained for each of them. Show clearly how you arrive at the answers (use mechanisms). [4 marks]
1.x=n
2.y=3n/2
3.x+y =5n/2
4.y+z = 2n +1 *
one modern instrumental methodology that can be used to determine the functional groups of a compound without using the qualitative tests
How many molecules of oxygen are there in a 1.00 g sample of O2? (Avogadro constant, L = 6.02 × 1023 mol–1)
What are the names of the following structures based on the IUPAC system.
1. CH3CºCCH2CH3
2. (CH3)2CHCºCC(CH3)3
3. CH3CH(C3H5)CH=CHCH(CH2CH2CH3)CH2CH2CH3
4. CH3CH2C(CH2CH3)=CHCH(CH2CH3)CH2CH2CH(CH3)CH3
5. CH3(CH2)3CºCH
6. CH(Br)2CH2CH2CºCC(CH3)3
7. CH3(CH3)CH=CH2
8. CH3CH2CH2C(CH3)=C(CH3)CH2CH3
9. CH3CH2CH(CH3)CºCH
10. CH3CH=CHCH2CH=CH2
What is the oxidation number of Cr in Au2(CrO4)3
1) Explain why cycloheptene though very unstable, can be made but cycloheptyne has never been made.
how will you improve potential energy value of hydrogen molecule
