Question

2. Answer all parts. Metal complexes such as \( \mathbf{A} \) and \( \mathbf{B} \) below, are used as reagents in organic transformations, in organometallic synthesis, and more recently as antimicrobial agents. When characterising these type of complexes Infrared and Raman spectroscopy, are routinely used. When a solution containing \( \mathrm{Mo}(\mathrm{CO})_{6} \) is heated with pyridine, a number of products may form including \( \mathbf{A} \) and \( \mathbf{B} \) below. A B (i) Determine the point groups to which structures \( \mathbf{A} \) and \( \mathbf{B} \) belong, (ii) Calculate the number of M-CO stretching vibrations in the infrared spectrum expected for both \( \mathbf{A} \) and \( \mathbf{B} \), (iii) Is it possible using infrared spectroscopy to determine which complex forms? A or \( \mathbf{B} \) (provide a rationale for your answer).

          2. Answer all parts.
Metal complexes such as \( \mathbf{A} \) and \( \mathbf{B} \) below, are used as reagents in organic transformations, in organometallic synthesis, and more recently as antimicrobial agents. When characterising these type of complexes Infrared and Raman spectroscopy, are routinely used.
When a solution containing \( \mathrm{Mo}(\mathrm{CO})_{6} \) is heated with pyridine, a number of products may form including \( \mathbf{A} \) and \( \mathbf{B} \) below.
A
B
(i) Determine the point groups to which structures \( \mathbf{A} \) and \( \mathbf{B} \) belong,
(ii) Calculate the number of M-CO stretching vibrations in the infrared spectrum expected for both \( \mathbf{A} \) and \( \mathbf{B} \),
(iii) Is it possible using infrared spectroscopy to determine which complex forms? A or \( \mathbf{B} \) (provide a rationale for your answer).

2. Answer all parts.
Metal complexes such as 𝐀 and 𝐁 below, are used as reagents in organic transformations, in organometallic synthesis, and more recently as antimicrobial agents. When characterising these type of complexes Infrared and Raman spectroscopy, are routinely used.
When a solution containing Mo(CO)6 is heated with pyridine, a number of products may form including 𝐀 and 𝐁 below.
A
B
(i) Determine the point groups to which structures 𝐀 and 𝐁 belong,
(ii) Calculate the number of M-CO stretching vibrations in the infrared spectrum expected for both 𝐀 and 𝐁,
(iii) Is it possible using infrared spectroscopy to determine which complex forms? A or 𝐁 (provide a rationale for your answer).

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