. (a) Oxidation of 1-butanol with PCC will produce which of the following?     2-chlorobutanal     butanone     butanoic acid     butanal (b) Which synthetic route is the best way to prepare ethyl isopropyl ether?     CH3CH2OH  +  (CH3)2CHOH  +  H2SO4, 140 oC      CH3CH2ONa  +  (CH3)2CHOH      CH3CH2ONa  +  (CH3)2CHBr     (CH3)2CHONa  +  CH3CH2Br (c) The Williamson ether synthesis involves nucleophilic substitution involving an alkyl halide and an alcohol. (True or False)

1015MSC Chemistry of Biological Systems II 2021 2. What kind of results do you expect to see when the following compounds are mixed together with the given test solution? Indicate positive or negative in the table below. (a) with 2,4-dinitrophenylhydrazine (b) with Benedict's reagent (c) with lodoform reagent CH3 (d) with Tollen's reagent

18. Identify the products from each step in the following synthesis sequence of reactions.  Show the structure of all reactants and products from each step. (a) 3-methyl-1-pentanol + PBr3  --------> A (b) A + Mg/ether-------->B (c) B + 1.CH3CH2C(O)H/2.H3O+  -------> C (d) C + Na2Cr2O7/H2SO4, H2O -----> D

There are three compounds with same molecular formula C8H9Br, andit has been known that all these three compounds contain a phenyl ring, anethyl group, and a bromide atom. A cannot react with AgNO3. B reactswith AgNO3 smoothly at room temperature. C can react with AgNO3 athigh temperature. Try to give the structures of A, B and C.

6) 25pts. Draw the structure of the major alkene product (or products) formed by treatment of each of the following haloalkanes with sodium ethoxide in ethanol. Assume the mechanism is E2 elimination. t-BuO K t-BUOH Br CH3 Eto Na F ETOH CH2CH3 CI H- Eto Na -CH2CH3 ELOH H- ČH3 Br Eto Na ELOH CH3 CI, H Eto Na CH2CH3 H3C H D ELOH

Isoerythrogenic acid, C18H26O2, is an acetylic fatty acid that turns a vivid blue on exposure to UV light. On Catalytic hydrogenation over a palladium catalyst, five molar equivalents of hydrogen are absorbed, and stearic acid, CH3(CH2)16CO2H, is produced. Ozonolysis of isoerythrogenic acid yields the following products: formaldehyde, CH2O, malonic acid, HO2CCH2CO2H, adipic acid, HO2C(CH2)4CO2H, and the aldehyde carboxylic acid, OHC(CH2)6CO2H. Provide a structure for isoerythrogenic acid.

write the structural formula for the products that form when propanal reacts with (C6H5)3P+-CH2 (step by step mechanism)

5B Using benzene as a raw material and reagents of your choice, propose a method of preparing 4-ethylaniline

Which is the major isolated organic product of the reaction shown? (A) (B) Pd(PPH3)4 KOH

H₂C ཏཱཏི 1 ནི OH 1. Br2, PBг3 2. H₂O H3C OH Br The a-bromination of carbonyl compounds by Br2 in acetic acid is limited to aldehydes and ketones because acids, esters, and amides don't enolize to a sufficient extent. Carboxylic acids, however, can be a-brominated by first converting the carboxylic acid to an acid bromide by treatment with PBr3. Following enolization of the acid bromide, Br2 reacts in an a-substitution reaction. Hydrolysis of the acid bromide completes the reaction. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions :0: H3C Br Br + :::OH2 Br H₂O H3C Br за