Chemistry - CHEMICAL BONDING Question with Solution | TestHub
The displayed substituted ketene ClHC=C=O is idealised with its C=C=O axis along x. H, Cl and the terminal carbon lie in the xy plane. The C=C π bond uses orbitals and the C=O π bond uses orbitals on the central carbon. A student labels the angular nodal plane of the first π bond P and that of the second Q; R is the plane containing the entire molecule in this idealisation. Which assignment is correct?
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Answer:
Solution:
A -based π orbital vanishes in the xy plane (z=0), while a -based π orbital vanishes in the xz plane (y=0). All three atoms of the cumulene axis lie on x, and the terminal substituents were placed in xy, so every nucleus lies in xy. The two π systems are perpendicular even though all nuclei are coplanar. The supplied axis and orbital assignments, not a remembered sketch orientation, determine P and Q.
