Answer to Question #338652 in General Chemistry for Austine

Question #338652

9. The antibiotic thiarubin-A was discovered by studying the feeding habits of wild

     chimpanzees in Tanzania. The structure for thiarubin-A is

a. Complete the Lewis structure showing all lone pairs of electrons.

b. Indicate the hybrid orbitals used by the carbon and sulfur atoms in thiarubin-A.

c. How many σ and π bonds are present in this molecule?


1
Expert's answer
2022-05-12T01:06:20-0400

a. The only lone pairs on this structure exist on the sulfurs. All of the carbons are are sufficiently bonded to other atoms.


b. Moving from left to right, sp3, sp, sp, sp2, sp2, sp2, sp3, sp2, sp3, sp2, sp2. Atoms connected to four things are sp3, atoms connected to three things are sp2, atoms connected to two things are sp.


c. Every bond (remember to count each individual CH bond) is a sigma bond. All additional bonds are pi bonds. There are 23 sigma bonds and 9 pi bonds.

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