RSAB - Reactivity Stability Acidity Basicity 90(II)9(a RSAB/ALQ&A/P.1 Each of the following carbonyl compounds P Q and R reacts with 2, in the

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Reactivity, Stability, Acidity, Basicity 90(II)9.(a) Each of the following carbonyl compounds P , Q and R reacts with 2,4- dinitrophenylhydrazine in the presence of a strong acid to give a phenylhydrazone derivative. C CH 2 CH 2 CH 3 O C CH 2 CH 2 CH 3 O C O CH 2 CH CH 3 CH 3 CH 3 CH 3 CF 3 P Q R (ii) Under the same conditions, P, Q and R form phenylhydrazones at different rates. Predict with an explanation which react the fastest, and which the slowest. (iii) Explain why 2,4-dinitrophenylhydrazones are useful derivatives of carbonyl compounds. ( 7 marks ) 91(I)1.(b) (i) C H O C H CH 2 CH 3 CH 3 F E Explain why hydroxylamine reacts with F and not with E , and give the product expected from the reaction. ( 3 marks ) 92(II)9.(b) Arrange the following hydroxy-compounds in order of increasing acidity. Explain your order. OH OH NO 2 OH ( 5 marks )
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Reactivity, Stability, Acidity, Basicity 93(I)3.(f) Consider the following compounds : C H OH O OH CH 3 and Y Z (i) Account for the fact that both Y and Z are acidic. (ii) Which compound, Y or Z , is the stronger acid ? Explain. ( 4 marks ) 95(I)3.(a) Arrange the following carbocations in the order of increasing stability. Explain your arrangement. CH 2 CH 2 , and + + + ( 3 marks ) (b) Arrange the following carboxylic acids in the order of increasing acidity. Explain your arrangement. ClCH 2 CO 2 H , ClCH 2 CH 2 CO 2 H and FCH 2 CO 2 H ( 3 marks ) 96(I)3.(a) Arrange the following carbocations in the order of increasing stability. Explain your arrangement. CH 3 CH 3 CH 2 and , + + + ( 3 marks ) (b) Arrange the following compounds in the order of increasing basic strength. Explain your arrangement. ( 3 marks )
Background image of page 2
Reactivity, Stability, Acidity, Basicity NH 2 NH 2 NH 3 , and 99(II)4.(c) (i) Arrange, with explanation, the compounds below in the order of increasing acidity. HCO
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/17/2011 for the course CHEM 100 taught by Professor Fleet during the Fall '08 term at Oxford University.

Page1 / 8

RSAB - Reactivity Stability Acidity Basicity 90(II)9(a RSAB/ALQ&A/P.1 Each of the following carbonyl compounds P Q and R reacts with 2, in the

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online