A-What atomic or hybrid orbital on C makes up the sigma bond between C and O in

Question

A-What atomic or hybrid orbital on C makes up the sigma bond between C and O in carbon dioxide, CO2 ? orbital on C What is the approximate O-C-O bond angle ? ... °

B-What atomic or hybrid orbitals make up the sigma bond between C1 and C2 in acetylene, C2H2 ? orbital on C1 + orbital on C2 What is the approximate H-C1-C2 bond angle ? ... °

C-What atomic or hybrid orbitals make up the sigma bond between C2 and C3 in propyne, CHCCH3 ? (C2 is the second carbon in the structure as written.) orbital on C2 + orbital on C3 What is the approximate C1-C2-C3 bond angle ? ... °

Explanation / Answer

A) SP orbital of carbon participates the sigma bonding of CO2. As a result, O-C-O bond angle is 180o

B) In acetylene, both the carbons are sp hybridized. Here, sp hybrid orbital of C2 combines with the s atomic orbital of H to form the C2 -H sigma bond. The bond angle C1-C2-H is 180o

C) In propyne, the SP orbital on C2 combines with the sp3 orbital of C3. The bond angle of the C1-C2-C3 bond is 180o

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