The CO ligands in the molecule Ni(CO)4 could have two possible geometries - a tetrahedral arrangement...

The CO ligands in the molecule Ni(CO)₄ could have two possible geometries - a tetrahedral arrangement of carbon monoxides around the central nickel atom, or a square planar geometry in which all the atoms are in the same plane and all of the C-Ni-C angles are 90 degrees.

For each geometry, determine the following:

(a) What is the point group?

(b) Write the reducible representation for the C-O stretching vibrational modes.

(c) Use the reduction formula to determine the irreducible representations for the C-O stretching vibrational modes.

(d) Which of the C-O streching vibrational modes are in the infrared spectrum? Which modes are allowed in the Raman spectrum? And how many emissions could possibly be observed for both infrared and Raman?

Expert Solution

queen_honey_blossom answered 2 years ago

The CO ligands in the molecule Ni(CO)4 could have two possible geometries – a tetrahedral arrangement...

The CO ligands in the molecule Ni(CO)4 could have two possible geometries – a tetrahedral arrangement of carbon monoxides around the central nickel atom, or a square planar geometry in which all of the atoms are in the same plane and all of the C-Ni-C angles are 90º. For each geometry, determine the following: (a) What is its point group? (b) Write the reducible representation for the C-O stretching vibrational modes. (Hint: For the square planar form, C2' and sv...

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Suppose a particular mechanism has the following equilibria: Ni(CO)4(g) ⇌ Ni(s) + 4 CO(g) K1 =...

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