Organic chemistry might seem intimidating, but understanding functional groups and...
Chemistry65 views·Updated 31 Aug 2026·1 pageCore Concepts in Organic Chemistry: A-Level Chemistry Notes Summary
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Functional Groups and Nomenclature Basics
Functional groups are specific arrangements of atoms that give organic molecules their characteristic properties and reactions. Think of them as the "personality traits" of molecules - they determine how compounds behave and what they can do.
The systematic naming system uses prefixes and suffixes to describe these groups. For alkenes, you'll add "-ene" to the base name (like ethene), whilst alcohols get "-ol" (like ethanol). Halogenoalkanes use prefixes like "chloro-" or "bromo-" before the main name.
Each functional group has its own general formula that shows the relationship between carbon, hydrogen, and other atoms. Alkenes follow CₙH₂ₙ, whilst alcohols follow CₙH₂ₙ₊₁OH, and carboxylic acids use CₙH₂ₙ₊₁COOH.
Quick Tip: Learn the general formulae by heart - they're essential for identifying unknown compounds and will save you time in exams!
Key functional groups to master include aldehydes (-al suffix), ketones (-one suffix), carboxylic acids (-oic acid suffix), amines (alkyl-amine), and nitriles (-nitrile suffix). Each has distinct properties you'll explore in detail throughout your course.
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Chemistry65 views·Updated 31 Aug 2026·1 pageCore Concepts in Organic Chemistry: A-Level Chemistry Notes Summary
sam@samj0yce
Organic chemistry might seem intimidating, but understanding functional groups and basic concepts is like learning a new language with clear patterns and rules. These fundamentals will help you identify, name, and understand the behaviour of organic molecules you'll encounter throughout...
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Functional Groups and Nomenclature Basics
Functional groups are specific arrangements of atoms that give organic molecules their characteristic properties and reactions. Think of them as the "personality traits" of molecules - they determine how compounds behave and what they can do.
The systematic naming system uses prefixes and suffixes to describe these groups. For alkenes, you'll add "-ene" to the base name (like ethene), whilst alcohols get "-ol" (like ethanol). Halogenoalkanes use prefixes like "chloro-" or "bromo-" before the main name.
Each functional group has its own general formula that shows the relationship between carbon, hydrogen, and other atoms. Alkenes follow CₙH₂ₙ, whilst alcohols follow CₙH₂ₙ₊₁OH, and carboxylic acids use CₙH₂ₙ₊₁COOH.
Quick Tip: Learn the general formulae by heart - they're essential for identifying unknown compounds and will save you time in exams!
Key functional groups to master include aldehydes (-al suffix), ketones (-one suffix), carboxylic acids (-oic acid suffix), amines (alkyl-amine), and nitriles (-nitrile suffix). Each has distinct properties you'll explore in detail throughout your course.
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