The reaction of Nb (CH2CMe3)3Cl2 with two equivalents of LiCH2CMe3 leads to the formation of compound F, LICI and one equivalent of neopentane CMe4. Reaction of compound F with benzaldehyde, Ph-CHO, produces the olefin PhCH=CHCMе3 and [Nb(CH2CMe3)30]n. Give the structural formula of compound F and outline the reaction mechanism for the formation of PhCH=CHCMe3.

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

An unknown hydrocarbon Q has a formula C6H12. Q reacts with osmium tetroxide to give a diol R when oxidized with KMnQ4 in an acidic medium Q gives two products. One product is propanoic acid and the other is ketone S. Provide reaction equations to identify the possible structures of Q, R and S.

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…