Problem: 1. Indicate which orbitals overlap to form the σ bond between the carbon atoms in HCCH.a) between an unhybridized s orbital on C and an unhybridized s orbital on the other C.b) between a hybrid sp orbital on C and a hybrid sp orbital on the other C.c) between a hybrid sp2 orbital on C and a hybrid sp2 orbital on the other C.2. Indicate which orbitals overlap to form the π bond between the carbon atoms HCCH. a) between an unhybridized s orbital on C and an unhybridized s orbital on the other C.b) between an unhybridized p orbital on C and an unhybridized p orbital on the other C.c) between a hybrid sp2 orbital on C and a hybrid sp2 orbital on the other C. d) between a hybrid sp orbital on C and a hybrid sp orbital on the other C. 

FREE Expert Solution

Step 1Hydrogen cannot be the central atom because it only forms 1 bond.


Step 2: The total number of valence electrons present in HCCH is:


            Group             Valence Electrons

C           4A                   2 × 4 e8 e

H           1A                   2 × 1 e2 e

                                   Total: 10 valence e


Step 3: Hydrogen can only form one bond. Carbon prefers to form 4 bonds

The Lewis structure is:


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Problem Details

1. Indicate which orbitals overlap to form the σ bond between the carbon atoms in HCCH.

a) between an unhybridized s orbital on C and an unhybridized s orbital on the other C.

b) between a hybrid sp orbital on C and a hybrid sp orbital on the other C.

c) between a hybrid sp2 orbital on C and a hybrid sp2 orbital on the other C.


2. Indicate which orbitals overlap to form the π bond between the carbon atoms HCCH. 

a) between an unhybridized s orbital on C and an unhybridized s orbital on the other C.

b) between an unhybridized p orbital on C and an unhybridized p orbital on the other C.

c) between a hybrid sp2 orbital on C and a hybrid sp2 orbital on the other C. 

d) between a hybrid sp orbital on C and a hybrid sp orbital on the other C. 


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