Hybridization of the central atom in Acetone CH3COCH3

 

Draw the Lewis structures for each of the following molecules and determine the electron pair
geometry and the molecular geometry as predicted by the VSEPR.
1) F2
2) N2
3) ICL
4) CO2
5) NH3
6) CF4
7) C2H6
8) C2H4
9) C2H2
10) HCN
11) SO2
12) HNO3 (the hydrogen is bonded to one of the oxygens).
13) CH4O
For each of the following polyatomic ions, draw all resonance structures. Based on the formal
charges identify which is the best resonance structure. (if all resonance structures are equivalent
indicate so next to the structure). Indicate the bond angles as predicted by VSEPR for the best
structure .

14) OH15) CN16) ClO2

17) ClO3

18) CO3
2-
19) SO3
2-
20) SCN-
21) HCO2

22) NO2
+
State the hybridization of each of the central atom in each of the following.
23) ClO2

24) ClO3

25) CO3
2-
26) SO3
2-
27) SCN28) HCO2

29) NO2 –
30) Hydrogen Peroxide (H2O2) is a reactive molecule, often used an antiseptic and sometimes
used for bleaching. Draw a Lewis structure for hydrogen peroxide (peroxide is a
polyatomic ion). What is the oxidation state of the oxygen in hydrogen peroxide?
Suggest a reason for its reactivity.
31) What is the hybridization of the central atom in Acetone CH3COCH3?

Sample Solution

The oxygen and carbon sp2 have hybridized in acetone. The oxygens in carbon dioxide are sp2, but the carbon is sp hybridized. Added: For SO24, the sigma bonds require the use of two d orbitals, therefore it is spd2 hybridized, while the pi bonds require the use of two p orbitals.
What is acetylene hybridization?
Both carbons are sp-hybridized in the hybrid orbital image of acetylene. Between the carbons, these two perpendicular pairs of p orbitals produce two pi bonds, totaling a triple bond (one sigma bond plus two pi bonds).

 

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