How many units of unsaturations does a compound with the formula C30H50Br2 have? Show your work. You may wish to review Section 7.2 in McMurry.

(R)-2-butanol reacts with phosphorus tribromide to give A (C4H9Br). Treatment of A with sodium cyanide in DMF gives B (C5H9)N. B is optically active. Draw the structure of B. • Use the wedge/hash bond tools to indicate stereochemistry where it exists. Show stereochemistry in a meso compound. Sn [F ? ChemDoodleⓇ

Calculate the units of unsaturation of C6H7NO. And draw out the structure.

a-pinene When a-pinene reacts with 1. BH3; 2. H₂O2, NaOH, H₂O 4 possible cis,trans isomers can be formed, but one of these is formed more readily than the others. Draw the structure of this preferred isomer. • Use the wedge/hash bond tools to indicate stereochemistry where it exists. • To aid you in your drawing, the structure of a-pinene is provided for you in the drawing palette.

12.Use of KMnO, to effect oxidative cleave of the alkene J, C3H16, yields two fragments, one of which is butanoic acid and the other a ketone, Q. When J reacts with one molar equivalent of H-Cl, the alkyl halide K, C3H17CI, is formed. What are the structures of J, J, and Q? Write all the reactions, and show your reasoning.

Explain the hybridisation of electron orbitals in a carbon atom (sp, sp2 and sp3), giving a detailed explanation, supported by suitable examples, of how sigma (s) and pi (p) bonds are formed. 2 Explain why alkenes are much more reactive than alkanes towards chlorine (C12) or bromine (Br2) in the dark at room temperature, and why alkanes do not react with HCI (g) or HBr (g) whereas alkenes do. please provide a diagram as well

What is a molecule that fits these three criteria: It should have a molar mass between 180 and 280 g/mol, contain a substituted cyclohexane like e. g. 5,6-dihydroxy-bicyclo[2.2.2]octane-2-carboxylic acid methyl ester, and be optically active.

"A research team synthesizes a novel organic compound 'X' with the molecular formula C5H8O2. When 'X' is treated with a deuterated acid (D2O), a single deuterium atom replaces a hydrogen atom, forming compound 'Y' (C5H7DO2). 'X' does not react with 2,4-Dinitrophenylhydrazine (2,4-DNP) but does react with both Tollens' reagent and Benedict's solution, forming a silver mirror and a red precipitate, respectively. Furthermore, 'X' undergoes catalytic hydrogenation over a palladium catalyst, consuming one mole of hydrogen to form a compound 'Z' (C5H10O2). Based on these observations, what is the most likely structure of compound 'X'?" A. Methyl vinyl ketone B. 3-Buten-2-one C. Acetoacetic ester D. 2-Hydroxypent-3-enal

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If 3.5L of a 4.8 mol/L SrCl2 solution is diluted to 45L, what is the molarity of the diluted solution? Write/Balance the following chemical equations: a) Co(NO3)s ( aq) + (NH4)2S ( aq) Co2S3(s) NH.NO:(aq) b) Solid iron (III) oxide reacts with hydrogen gas to form solid iron and liquid water.