posted 13/11/2008Reactions of Halogenoalkanes 1

 

Age 16-18 (A-level)

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"An excellent, fairly detailed resource on this topic. The mechanism is very well expla..."

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Contributor:
Joanne Nicholson

 

A powerpoint and accompanying worksheet looking at the structure of halogenoalkanes and focusing on the nucleophilic substitution mechanism. It includes details of SN1 and SN2 reactions and has examples of reactions and their conditions. There are several animated mechanisms. Elimination is also discussed.

posted 13/11/2008The Physical and Chemical Properties of Alkanes

 

Age 16-18 (A-level)

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"Comprehensive resource with a suitable level of detail for an introduction to this subj..."

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Contributor:
Joanne Nicholson

 

Powerpoint and accompanying worksheet on the properties of alkanes: trends in melting and boiling points; solubility; trends in chemical reactivity; combustion; halogenation. There is a comparison of alkanes, cycloalkanes and their isomers. This is aimed at either Foundation year or A level students.

posted 17/09/2008Polymerisation

 

Age 16-18 (A-level)

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"A very clear, detailed and very well presented resource. It includes a lot of informat..."

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Contributor:
Jennifer Howes

 

A detailed presentation discussing addition and condensation polymerisation. The addition polymerisation section concentrates on alkenes, deducing the monomer from given polymer chains, and the example of polypropene (e.g. isotactic/atactic/syndiotactic modes). The condensation polymerisation section discusses the preperation and properties of polyesters, polyamides and peptides.

Further information: http://www.knockhardy.org.uk/ppoints....

posted 15/09/2008Spectroscopy Techniques

 

Age 16-18 (A-level)

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"These are detailed but beautifully presented resources. Chemical principles are very c..."

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Contributor:
Jennifer Howes

 

Two fairly detailed presentations covering Infra-red spectroscopy and Nuclear Magnetic Resonance spectroscopy. For each technique, the underlying chemical principles are clearly explained and examples of spectra are interpreted. The limitations of the methods are discussed and necessary information for interpreting spectra is provided.

Further information: http://www.knockhardy.org.uk/ppoints....

posted 15/09/2008Isomerism

 

Age 16-18 (A-level)

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"A beautifully presented resource with excellent content. It is quite detailed, but tai..."

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Contributor:
Jennifer Howes

 

A detailed guide to isomerism for A level. It systematically describes structural isomerism (chain, position and functional group), and stereoisomerism (geometrical (cis/trans) and optical). It includes examples of each type and clearly explains underlying chemical principles in each case. It also discusses racemate mixtures and enantiomers, and their importance for safe drug synthesis.

posted 08/12/2007Naming Organic Molecules

 

Age 16-18 (A-level)

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Contributor:
Leah Bruce

 

Step by step guidelines for naming organic compounds. Includes listings of root names, functional groups and substituent groups as well as detailing naming conventions and providing examples of complex molecules.

posted 22/09/2008Introduction to Mechanisms

 

Age 16-18 (A-level)

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"A well presented, well structured short introduction to the potentially confusing subje..."

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Contributor:
Jennifer Howes

 

A presentation which introduces the nucleophile, electrophile and lone pair, and outlines the types of bonds each is most likely to attack. It then investigates the bonding in alkanes, alkenes and halogenoalkenes to deduce which type of mechanism is likely to occur and why.

posted 13/11/2008Physical properties of alkenes

 

Age 16-18 (A-level)

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"The notes present useful information about alkene reactions but are quite wordy and som..."

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Contributor:
Joanne Nicholson

 

A set of notes with follow up questions covering physical properties and reactions of alkenes: addition reactions; hydrogenation; and the manufacture of marjarine; oxidation; direct hydration and the production of ethanol. The powerpoint concentrates of the oxidation of alkenes.

posted 15/01/2008A free-radical substitution mechanism

 

Age 16-18 (A-level)

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Contributor:
Leah Bruce

 

Step by step presenttation to show initiation, propagation and termination of the chlorination of methane, a free radical chain reaction. With supplementary notes.