(a) Draw the structure of [Rh2(µ-O2CCH3)4(H2O)2] and use orbital overlap sketches and an energy level diagram to indicate the metal- metal bond order. (b) Give the two most commonly used metal oxide (MO) oxidising agents in organic synthesis from groups 6 and 8, rationalising your choice of metal in each case.

b) i) Draw the different structural isomers of the 6-membered ring compound [GAAIBNPAS]H6 in which there are alternating Group 13 and 15 elements. ii) The isomers containing both B-N and AI-N bonding are the most stable. Explain why this is the case. ii) How would you expect the structure and reactivity of the heterocycles [GAAIBNPAS]H6 to compare with borazine? iv) While borazine exists as a planar ring compound, the [GAAIBNPAS]H6 ring compounds dimerize. Explain these observations. H -ЕН -E H-E НЕ ЕН E НЕ- ЕН H `E H. H É-H НЕ E = Heteroatom エー山、 w-I

4. Outline the following synthesis (a). Butane to 2-butanol (b). 1,2-dibromopropane from 2-propanol (c). 1-butanol to 2-butanol (d). Propane to Propene

7 (i) Build and draw the structures of (a) E-2,3-dichloro-2-butene and (b) Z-2,3- dichloro-2-butene (ii) Can these be interconverted by twisting bonds? (iii) what is the relationship between these structures

Draw the structure of the predominant form of CF3CH2OH (pK a = 12.4) at pH = 6.

What is the structure of C8H10O2? ( If the following information is given, please show the steps. )

A major use of Cl2 is in the manufacture of vinyl chloride,the monomer of poly(vinyl chloride). The two-step sequence forformation of vinyl chloride is depicted below.(a) Write a balanced equation for each step. (b) Write the overallequation. (c) What type of organic reaction is shown in step 1?(d) What type of organic reaction is shown in step 2? (e) If eachmolecule depicted in the initial reaction mixture represents0.15 mol of substance, what mass (in g) of vinyl chloride forms?

Which of the following is true for the reactions of alkyl halides? (a) The characteristic reactions of alkyl halides are oxidation and reduction.(b) The characteristic reactions of alkyl halides are elimination and substitutionc. The characteristic reactions of alkyl halides are addition and substitutiond. Characteristic reactions of alkyl halides are addition and elimination.

Draw a three-dimensional representation (using wedges and dashed lines) of the structure.(a) CO2 (b) CH3OCH3 (c) (CH3)3O+ (d) CH3COOH(e) CH3CCH (f) CH3CHNCH3 (g) H2CCO

Compound E is a branched molecule with the molecular formula of CH140. Compound E reacted with hot concentrated phosphoric acid to form Compound F (major product). Compound G was produced when Compound F reacted with hydrogen gas in the presence of platinum while Compound H was produced when Compound F reacted with Br2 in H20. Compound F reacted with hydrogen bromide in the presences of hydrogen peroxide to form Compound I. Compound J formed when Compound F reacted with cold dilute manganate (VII) ions while Compound K formed when Compound F reacted with hot acidified concentrated potassium permanganate. Compound I was heated with aqueous sodium hydroxide to produce Compound L. Compound M was produced when Compound I reacted with aqueous ammonia in ethanol while Compound N was produced when Compound I reacted with sodium cyanide. Identify the possible structural formulae for compound E to N. State ONE test to differentiate between Compound F and Compound G. Give TWO differences between…