Draw the complete MO diagram

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Reference no: EM132518878

Question - Consider SF₃-. Recall from MT1 question 3e that the molecule adopts a T-shape and belongs to the C_2v point group.

a) For question, making the following assumptions: the 2s LGOs of the 3F are too low in energy to interact with the sulfur atomic orbitals and the 2p_z LGOs of the 3F have poor overlap with the sulfur atomic orbitals. Therefore, the molecular orbitals are dominated by interactions between the central sulfur atomic orbitals and the 2p_y and 2p_x LGOs of the 3F. Consider the incomplete figure below of the 2p_y and 2p_x LGOs of the 3F. Fill in the missing pieces (draw LGO 1 and 3, provide symmetries of LGO 1, 3, 4, and 6.

(Hint for LGO 6: you can use the projection method to determine the symmetry of LGO 4; LGO 6 is what remains from your irreducible representation.)

b) Draw the complete MO diagram of SF₃- (including electrons and symmetry labels of all MOs). Use dotted lines from AOs to MOs to indicate primary interactions. In addition to the assumptions stated in part b (the 2s and 2p_z LGOs will not interact with the central S atomic orbitals), make the following assumptions:

Due to overlap, LGO 1 will primarily interact with the 3s orbital of sulfur (and minimally with the 3p_z orbital of sulfur).

Due to overlap, LGO 2 will primarily interact with the 3p_z orbital of sulfur (and minimally with the 3s orbital of sulfur).

LGO 5 shares the same symmetry as either LGO 4 or LGO 6. Due to poor overlap relative to one of these, LGO 5 will effectively be nonbonding.

Reference no: EM132518878

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