A2 画图

The complex [Fe(bipy)₃] ²⁺ exists as two stereoisomers.

Complete the three-dimensional diagrams to show the two stereoisomers of [Fe(bipy)₃] ²⁺.

State the type of stereoisomerism shown.

Use N -N to represent bipy in your diagrams.

Pyridine reacts with Cl₂ in the presence of AlCl₃ as shown in Fig. 4.3.

The mechanism of this reaction is similar to that of the chlorination of benzene. AlCl₃ reacts

with chlorine to generate an electrophile, Cl⁺ .

Complete the diagram to show the mechanism for the reaction of pyridine with Cl⁺ . Include all

relevant charges, dipoles, lone pairs of electrons and curly arrows as appropriate.

Sketch the shape of a 3d_z²

orbital.

Complete the diagram of the apparatus that can be used to measure the E^o of the

Cr₂O₇ ^2–(aq), H⁺ (aq)/Cr³⁺(aq) electrode against the standard hydrogen electrode.

Your diagram should be fully labelled to identify all apparatus, substances and conditions.

The 3d orbitals in an isolated Fe²⁺ ion are degenerate.

Complete the diagram to show the splitting of the 3d orbital energy levels in an isolated Fe²⁺

ion and when Fe²⁺ forms an octahedral complex.

In step 1, 1-bromopropane reacts with CN^– to form butanenitrile.

Complete Fig. 5.3 to show the mechanism for step 1. Include charges, dipoles, lone pairs of electrons and curly arrows as appropriate.

The nitrogen atom in NH₄⁺ is sp³ hybridised. sp³ orbitals form from the mixing of one 2s and three 2p orbitals.

Sketch the shapes of a 2s and a 2px orbital on the axes in Fig. 1.1.

OH^– (aq) reacts with 2-bromo-2-methylpropane in an SN₁ reaction.

The molecular ion (CH₃)₃C⁺ forms as the intermediate in this reaction.

(i) Draw the mechanism for the SN₁ reaction of OH^– with 2-bromo-2-methylpropane.

Include charges, dipoles, lone pairs of electrons and curly arrows as appropriate.

Draw the structures of the organic reactant and organic product.

HBr reacts with propene to form two bromoalkanes, CH₃CH₂CH₂Br and (CH₃)₂CHBr.

(i) Complete the diagram to show the mechanism of the reaction of HBr and propene to form

the major organic product.

Include charges, dipoles, lone pairs of electrons and curly arrows, as appropriate.

Draw the structures of the intermediate and the major organic product.

On Fig. 3.2, sketch the pH titration curves produced when:

● 0.1mol dm^–3 NaOH(aq) is added to 25cm³ of 0.1moldm^–3 HBr(aq), to excess

● 0.1moldm^–3 NH₃(aq) is added to 25cm³ of 0.1moldm^–3 HBr(aq), to excess.