Oxford Cambridge and RSA
AS Level Chemistry B (H033)
A Level Chemistry B (H433)
Data Sheet
* 3 4 2 7 1 7 1 4 2 6 *
INSTRUCTIONS
• Do not send this Data Sheet for marking. Keep it in the centre or recycle it.
INFORMATION
• This document has 4 pages.
General Information Triplet base codes
(codons) for some amino
Molar gas volume = 24.0 dm3 mol–1 at RTP acids used in mRNA
Avogadro constant, NA = 6.02 × 1023 mol–1 Glycine GGU
Specific heat capacity of water, c = 4.18 J g–1 K–1 Alanine GCC
Planck constant, h = 6.63 × 10–34 J Hz–1 Leucine CUG
Speed of light in a vacuum, c = 3.00 × 108 m s–1 Serine UCG
Chemistry B
Ionic product of water, Kw = 1.00 × 10–14 mol2 dm–6 at 298 K Aspartic acid GAU
1 tonne = 106 g Glutamine CAA
Arrhenius equation: k = Ae–Ea/RT or ln k = –Ea/RT + ln A Valine GUC
Gas constant, R = 8.314 J mol–1 K–1
Copyright Information
OCR is committed to seeking permission to reproduce all third-party content that it uses in its assessment materials. OCR has attempted to identify and contact all
copyright holders whose work is used in this paper. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are
reproduced in the OCR Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download from our public website
(www.ocr.org.uk) after the live examination series.
If OCR has unwittingly failed to correctly acknowledge or clear any third-party content in this assessment material, OCR will be happy to correct its mistake at the earliest
possible opportunity.
For queries or further information please contact The OCR Copyright Team, The Triangle Building, Shaftesbury Road, Cambridge CB2 8EA.
OCR is part of Cambridge University Press & Assessment, which is itself a department of the University of Cambridge.
© OCR 2025 Chemistry B (Salters)
DC (ST) 358155 CST264
for more: tyrionpapers.com
, Characteristic infrared absorptions in organic molecules Monomers of DNA and RNA
OH HO
OH
Bond Location Wavenumber / cm–1 HO
OH
– O OH
C–H Alkanes 2850–2950 O P O
O
Alkenes, arenes 3000–3100 OH
OH OH
C–C Alkanes 750–1100 phosphate ribose deoxyribose
C=C Alkenes 1620–1680 H 2N H
O H O N N
aromatic Several peaks in range N N N N O
Arenes NH2
C=C 1450–1650 (variable)
H N O H N NH2
C=O Aldehydes 1720–1740 N N N N
* H H
Ketones 1705–1725 uracil cytosine adenine guanine
Carboxylic acids 1700–1725
(thymine has a CH3 at position *)
Esters 1735–1750
Amides 1630–1700 Some useful organic reactions
2
Acyl chlorides
1750–1820 1 R–Br + CN– R–CN + Br–
and acid anhydrides
C–O Alcohols, ethers, esters H+ (aq)
1000–1300 2 R–CN R–COOH
and carboxylic acids
reflux
C N Nitriles 2220–2260
R NaBH4 R
C–X Fluoroalkanes 1000–1350
3 C O CH OH
Chloroalkanes 600–800
Bromoalkanes 500–600 R' R'
O–H Alcohols, phenols 3200–3600 (broad) 4 R–COOH + SOCl2 R–COCl + SO2 + HCl
Carboxylic acids 2500–3300 (broad) NO2 NH2
N—H Primary amines 3300–3500 Sn + conc. HCl
Amides ca. 3500 5 reflux
for more: tyrionpapers.com
© OCR 2025 Chemistry B (Salters)
,
13C NMR chemical shifts relative to TMS
C Cl
C Br
C
C C
C N
C C
C O C
C O C C
C C
220 200 180 160 140 120 100 80 60 40 20 0
δ / ppm
1H NMR chemical shifts relative to TMS
O H N H
3
CH
H
HC O O
O O
HC Cl HC C
C C C C HC R
HC Br
OH H H HC N
12 11 10 9 8 7 6 5 4 3 2 1 0
δ / ppm
Chemical shifts are variable and can vary depending on the solvent, concentration and substituents. As a result, shifts may be outside the ranges
indicated above.
OH and NH chemical shifts are very variable and are often broad. Signals are not usually seen as split peaks.
for more: tyrionpapers.com
Note that CH bonded to ‘shifting groups’ on either side, e.g. O–CH2–C=O, may be shifted more than indicated above.
© OCR 2025 Chemistry B (Salters)
AS Level Chemistry B (H033)
A Level Chemistry B (H433)
Data Sheet
* 3 4 2 7 1 7 1 4 2 6 *
INSTRUCTIONS
• Do not send this Data Sheet for marking. Keep it in the centre or recycle it.
INFORMATION
• This document has 4 pages.
General Information Triplet base codes
(codons) for some amino
Molar gas volume = 24.0 dm3 mol–1 at RTP acids used in mRNA
Avogadro constant, NA = 6.02 × 1023 mol–1 Glycine GGU
Specific heat capacity of water, c = 4.18 J g–1 K–1 Alanine GCC
Planck constant, h = 6.63 × 10–34 J Hz–1 Leucine CUG
Speed of light in a vacuum, c = 3.00 × 108 m s–1 Serine UCG
Chemistry B
Ionic product of water, Kw = 1.00 × 10–14 mol2 dm–6 at 298 K Aspartic acid GAU
1 tonne = 106 g Glutamine CAA
Arrhenius equation: k = Ae–Ea/RT or ln k = –Ea/RT + ln A Valine GUC
Gas constant, R = 8.314 J mol–1 K–1
Copyright Information
OCR is committed to seeking permission to reproduce all third-party content that it uses in its assessment materials. OCR has attempted to identify and contact all
copyright holders whose work is used in this paper. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are
reproduced in the OCR Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download from our public website
(www.ocr.org.uk) after the live examination series.
If OCR has unwittingly failed to correctly acknowledge or clear any third-party content in this assessment material, OCR will be happy to correct its mistake at the earliest
possible opportunity.
For queries or further information please contact The OCR Copyright Team, The Triangle Building, Shaftesbury Road, Cambridge CB2 8EA.
OCR is part of Cambridge University Press & Assessment, which is itself a department of the University of Cambridge.
© OCR 2025 Chemistry B (Salters)
DC (ST) 358155 CST264
for more: tyrionpapers.com
, Characteristic infrared absorptions in organic molecules Monomers of DNA and RNA
OH HO
OH
Bond Location Wavenumber / cm–1 HO
OH
– O OH
C–H Alkanes 2850–2950 O P O
O
Alkenes, arenes 3000–3100 OH
OH OH
C–C Alkanes 750–1100 phosphate ribose deoxyribose
C=C Alkenes 1620–1680 H 2N H
O H O N N
aromatic Several peaks in range N N N N O
Arenes NH2
C=C 1450–1650 (variable)
H N O H N NH2
C=O Aldehydes 1720–1740 N N N N
* H H
Ketones 1705–1725 uracil cytosine adenine guanine
Carboxylic acids 1700–1725
(thymine has a CH3 at position *)
Esters 1735–1750
Amides 1630–1700 Some useful organic reactions
2
Acyl chlorides
1750–1820 1 R–Br + CN– R–CN + Br–
and acid anhydrides
C–O Alcohols, ethers, esters H+ (aq)
1000–1300 2 R–CN R–COOH
and carboxylic acids
reflux
C N Nitriles 2220–2260
R NaBH4 R
C–X Fluoroalkanes 1000–1350
3 C O CH OH
Chloroalkanes 600–800
Bromoalkanes 500–600 R' R'
O–H Alcohols, phenols 3200–3600 (broad) 4 R–COOH + SOCl2 R–COCl + SO2 + HCl
Carboxylic acids 2500–3300 (broad) NO2 NH2
N—H Primary amines 3300–3500 Sn + conc. HCl
Amides ca. 3500 5 reflux
for more: tyrionpapers.com
© OCR 2025 Chemistry B (Salters)
,
13C NMR chemical shifts relative to TMS
C Cl
C Br
C
C C
C N
C C
C O C
C O C C
C C
220 200 180 160 140 120 100 80 60 40 20 0
δ / ppm
1H NMR chemical shifts relative to TMS
O H N H
3
CH
H
HC O O
O O
HC Cl HC C
C C C C HC R
HC Br
OH H H HC N
12 11 10 9 8 7 6 5 4 3 2 1 0
δ / ppm
Chemical shifts are variable and can vary depending on the solvent, concentration and substituents. As a result, shifts may be outside the ranges
indicated above.
OH and NH chemical shifts are very variable and are often broad. Signals are not usually seen as split peaks.
for more: tyrionpapers.com
Note that CH bonded to ‘shifting groups’ on either side, e.g. O–CH2–C=O, may be shifted more than indicated above.
© OCR 2025 Chemistry B (Salters)
