5:46 PM mybb.qu.edu.qa Ooredoo 1) Write the correct names of the following compo

Question

5:46 PM mybb.qu.edu.qa Ooredoo 1) Write the correct names of the following compounds CH2CH2 CHa CH3 CH3 2) Write the common names of the following compounds CH CH H:C=CH, CH,CH.CH, CHyC H2 CH2 = C-CH=CH2 3) Write the name of the following alkyl groups CH3 CH3 4) Which one is electrophile which is nucleophile? CI 5) Select the correct answer a Carbon atoms in a double bond compounds are sp or sp'or sp hybridized b) Combination of electrons in two sp orbitals of two atoms forms or bond between them c) Interaction of orbitals creates a or bonding orbital 6) Write the name of the following four compounds and show which one is cis which is Trans which is E or Z CH CH CH3 CH3 CH3 CH3 a

Explanation / Answer

1. CH3CH2CH2CH=CHCH3 Hex-2-ene ( numbering is done such that the substituents get the least number)

2. CH3CH(CH3)CH=CHCH2CH3 2-methyl hex-3-ene (methyl group is at the second position)

3. 2-ethyl pent-1-ene

4. CH2=C(CH3)CH=CH2 2-methyl-but-1,3-diene ( di is used as prefix to show two double bonds)

5. 1-methyl-1-cyclohexene

6. 1,4-cyclohexadiene (numbering will start from the double bond so that we get least numbering of both double bonds)

7. 2,3-dimethyl cyclopent-1-ene ( acc. to lowest locant rule (2+3=5) will be the lowest sum of the locants as compared to 1+5=6)

8. 6-methyl-3-octyne (alkyne will have priority)

9. Hept-1-en-6-yne (alkene will have priority over alkyne, en is written before yne because of alphabetical order)

10. 6-methyl-non-2-en-8-yne

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