The degree of unsaturation, or index of hydrogen deficiency, is the number of pi bonds plus rings in a molecule. Specify the degree of unsaturation (index of hydrogen deficiency) of the following formulas: (a) C₁H₁ (b) C₂H₂Cl₂ (C) C₂H₂N₂
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- The degree of unsaturation, or index of hydrogen deficiency, is the number of pi bonds plus rings in a molecule. Specify the degree of unsaturation (index of hydrogen deficiency) of the following formulas: (a) C24H30 (b) C15H22 (c) C,H¡Cl,NWrite the contributing resonance structures and resonance hybrid for each of the following: (a) CH;CH=CH-CH=OH (f) CH3 (b) CH2=CH-CH-CH=CH2 (g) CH3-S-CH, (h) CH3-NO, (d) CH2=CH-Br CH, (e)Specify the local electron geometries about the atoms labelled a-d. Unshared electron pairs affect local geometry and are included in the structural formula. For each atom enter one of the following: tetrahedral, square planar, trigonal planar, trigonal pyramidal, or linear. (a) (b) (c) (d) H- H H-C H H H H H 05 > -H
- Identify any carbon atoms that change hybridization and the change in hybridization during the reactions in (a) 2-butene reacts with chlorine.(b) benzene burns in air.Draw the complete Lewis structure of (CH3)2CHCH(NH2)CO2H and identify all H-bond donors and all H-bond acceptors.Specify the local electron geometries about the atoms labelled a-d. Unshared electron pairs affect local geometry and are included in the structural formula. For each atom enter one of the following: tetrahedral, square planar, trigonal planar, trigonal pyramidal, or linear. (a)[ (b) (c) (d) H H C b a Si-C H XHH H Н H H
- (a) Triazine, C3 H3 N3, is like benzene except that in triazineevery other C¬H group is replaced by a nitrogen atom.Draw the Lewis structure(s) for the triazine molecule. (b) Estimatethe carbon–nitrogen bond distances in the ring.Arrange the members of each of the following sets in order of increasing bond length and bond strengths :(a) C-N,C=N,C≡N(b) C-S, C=O, C-O (c) N-H, N-S, N-OWrite the structures of the following organic halogen compounds :(i) 4-tert-Butyl-3-iodoheptane(ii) 4-Bromo-3-methylpent-2-ene
- The pentadienyl radical, H2C“CH¬CH“CH¬CH2#, has its unpaired electron delocalized over three carbon atoms.(a) Use resonance forms to show which three carbon atoms bear the unpaired electron.(b) How many MOs are there in the molecular orbital picture of the pentadienyl radical?1: In the sweetening MEROX process for kerosene the mercaptans are converted into (a) Sulpher (b) Disulphide (c) Hydrogen sulphide (d) None of these 2: Which of the following products contain maximum sulphur? (a) Diesel fuel (b) Fuel oil (c) Jet fuel (d) LPG 3: Which of the following petroleum product has a maximum C/H ratio (by weight)? (a) Light diesel oil (b) Fuel oil (c) Naphtha (d) Heating oil 4: Which of the following hydrocarbon are most desirable in gasoline? (a) Paraffins (b) Isoparaffins (c) Naphthenes (d) Aromatic 5: Octane no. of paraffins: (a) Remain constant with change in the number of carbon atoms (b) Increases with increase in the number of carbon atoms (c)Decreases with increase in the number of carbon atoms (d)None of the above 6: Which of the following hydrocarbons has a maximum octane number? (a) Benzene (b) Cyclohexane (c) Hexane (d) Iso-hexane 7: Which of the following petroleum products has a minimum flashpoint? (a)Gasoline (b) Kerosene (c) Fuel oil (d) Heating…Predict the bond angles in the following molecules. (a) NF3 ° (b) SO2Cl2 ° (c) CBr4 ° (d) F2CO ° (e) PH3 ° (f) HOCl °