This question is worth 5 marks, answer all parts.

a. Besides iron, what are the next two most abundant transition metal ions in the human body? (1 mark)

b. Briefly describe the bonding mode of O₂ to the iron centre in one haem unit of haemoglobin. (4 marks)

This question is worth 5 marks, answer all parts.

For the manganese complex [Mn(CN)₆]^4- determine the oxidation state of Mn, give the number of d electrons, determine the spin state, the number of unpaired electrons and calculate the expected spin-only magnetic moment. (5 marks)

This question is worth 5 marks, answer all parts.

Consider the complex [CoBr(en)₂(OH₂)]²⁺.

a. Drawn below are all the possible isomers for [CoBr(en)₂(OH₂)]²⁺. Identify how isomers A–E are linked by describing the type of isomerism. (4 marks)

b. In an octahedral complex, explain why an electron in the d_x2-y2 or d_z2 orbital is of higher energy than one in a d_xy, d_xz or d_yz orbital. (1 mark)

This question is worth 5 marks, answer all parts.

a. Name one example of a charged bidentate ligand and one example of a bridging ligand. (2 marks)

b. Consider the following compound [CoBr(NH₃)₃(OH₂)₂]Br₂ to answer the following questions. (3 marks)

i. Identify the donor atoms.

ii. Give a systematic name for the coordination compound.

This question is worth 5 marks, answer all parts.

a. Consider Cr₂O₇^2-. What is the oxidation state of Cr and how many d electrons are there? (2 marks)

b. How does atomic size change for the 3d series from left-to-right across the period, and why? (3 marks)

This question is worth 5 marks, answer all parts.

a. Write the condensed electronic configuration of the following atoms in their free state. (3 marks)

i. Cr

ii. Fe

iii. Zn

b. For the main group elements, atomic size increases down the group. For the transition metals, how does the atomic size change from the 4d series to 5d series? What is the factor that causes the difference between these two types of elements? (2 marks)

This question is worth 5 marks, answer all parts.

Consider the reaction given below.

a. Identify the type of reaction occurring to give products A and B. (1 mark)

b. Identify the functional group(s) present in product A and B. (2 marks)

c. Consider the reaction given below. What would you expect to occur in this case. Explain your response (2 marks)

This question is worth 5 marks, answer all parts.

Consider the reaction given below.

a. Identify the type of reaction occurring to give products A and B. (1 mark)

b. Identify the functional group(s) present in product A and B. (2 marks)

c. Will product A or B be the major product? Explain your response. (2 marks)

This question is worth 5 marks, answer all parts.

Carvone occurs naturally in a number of essential oils. One enantiomer of carvone is shown below.

[α] = +61°

a. Determine the number of stereogenic centres in the molecule. (1 mark) 

b. Determine the stereoconfiguration of the stereogenic centre(s) in the molecule following the Cahn Ingold Prelog rules. (1 mark)

c. Determine the number of stereoisomers that exist for this molecule. (1 mark)  

d. Predict the optical rotation for the enantiomer of the compound given. Explain your response. (2 marks)

This question is worth 5 marks, answer all parts.

Consider the two molecules (A and B) given below.

a. Describe how IR spectroscopy might be used to distinguish between molecules A and B. (2 marks)

b. How many unique signals would be observed in the ¹H NMR spectrum of molecules A and B? (1 mark)

c. Describe how ¹H NMR spectroscopy might be used to distinguish between molecules A and B. (2 marks)