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COMEDK2023Evening ShiftChemistryChemical Bonding and Molecular StructureActual

Identify the correct statement describing the characteristics of C ₂ molecule.

Options

  1. ABond order =2.0 ; Diamagnetic in nature; Both bonds formed are pi bonds.
  2. BBond order =1.5 ; Paramagnetic in nature; Both bonds formed are sigma bonds ( ) .
  3. CBond order =0 C ₂ molecule is non-existent.
  4. DBond order =2.0 ; Paramagnetic in nature; One sigma and one pi bond formed.

Correct answer

A. Bond order =2.0 ; Diamagnetic in nature; Both bonds formed are pi bonds.

Step-by-step solution

C₂ (12e): _ 1s ^2 _ 1s ^ *2 _ 2s ^2 _ 2s ^ *2 _ 2p_x ^2 _ 2p_y ^2 Bond order = 1 2 (8 - 4) = 2.0 All electrons are paired diamagnetic. The two highest occupied MOs are _ 2p_x and _ 2p_y both bonds formed are pi bonds. Answer: Bond order = 2.0 , diamagnetic, both bonds are pi bonds. Option (1)

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