question_answer

If the intemuclear axis in the diatomic molecule AB is designated a s the z-axis of the various pairs of s, p or d atomic orbitals, which can be combined to form \[{{\pi }_{x}}\] orbitals? Which of the following combination will not form \[{{\pi }_{x}}\] orbital?

A) \[{{p}_{x}},{{p}_{x}}\]           

B)        \[{{p}_{x}},{{d}_{xz}}\]

C) \[{{d}_{xz}},{{d}_{xz}}\]        

D)        \[{{p}_{x}},{{d}_{{{x}^{2}}-{{y}^{2}}}}\]

Correct Answer: D

Solution :

[d] (i) \[({{p}_{x}},{{p}_{x}}),\,({{p}_{x}},{{d}_{xz}}),({{d}_{xz}},{{d}_{xz}})\] (ii) \[({{p}_{y}},{{p}_{y}}),({{p}_{y}},{{d}_{yz}}),({{d}_{yz}},{{d}_{yz}})\]  The figures below indicate the combination in xz projection.