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how science works

Making alkenes

The Wittig reaction

Alkenes are common in organic chemistry. The stereochemistry of the double bond determines many key properties such as melting point, boiling point and how the molecule reacts with other compounds. Chemists often need to make one specific stereoisomer, but achieving this has not always been easy

The Wittig reaction has helped scientists make useful molecules, such as drugs
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This ‘How science works’ will help you understand the following specification topics:

• alkenes

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Niels Bohr and atomic structure

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Burning blue

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