Carbon

Carbon and Organic Chemistry Basics

  • Need for Hydrogen and Carbon

    • Essential elements for organic compounds.

  • Properties of Carbon

    • Atomic number: 6

    • Atomic mass: 12

    • Isotopes:

    • Stable: ^{12}C

    • Radioactive: ^{14}C

    • Valence electrons: 4

    • Ability to form 4 covalent bonds (both single and double bonds).

  • Organic Chemistry

    • Definition: Study of carbon-based compounds.

    • Example of Inorganic Carbon Compound:

    • Carbon Dioxide (CO₂)

    • Structure: 0=C=O

  • Role of Photosynthesis

    • Process by which CO₂ is converted into organic molecules.

    • Converts CO₂ into glucose (CH₂O), which has higher energy than CO₂.

  • Bonding Characteristics of Carbon

    • Forms covalent bonds with:

    • Carbon (C)

    • Hydrogen (H)

    • Oxygen (O)

    • Nitrogen (N)

    • Phosphorus (P)

    • Sulfur (S)

    • Typically forms single and double bonds.

  • Organic Compound Diversity

    • Variations include:

    • Length

    • Branching

    • Double bond position

    • Presence of rings

  • Isomers in Organic Compounds

    • Definition: Compounds with the same chemical formula but different chemical structures.

    • Types of Isomers:

    • Structural isomers

    • Cis-trans isomers

    • Enantiomers

    • Example Compounds:

    • Glucose (C₆H₁₂O₆), Galactose (C₆H₁₂O₆), Fructose (C₆H₁₂O₆)

Functional Groups in Organic Chemistry

  • Functional Groups

    • Participate in chemical reactions (except for methyl group).

    • Increase water solubility (except for sulfhydryl and methyl groups).

  1. Hydroxyl Group (Alcohol)

    • Structure: -C-OH

    • Example:

      • Ethanol: CH₃CH₂OH

  2. Carbonyl Group

    • Structure: C=O

    • Forms two other bonds.

    • Types:

      • Ketones

      • Aldehydes

  3. Carboxyl Group

    • Structure: -COOH

    • Acts as an acid (releases H⁺).

  4. Amino Group

    • Part of an amino acid.

    • Example:

      • Structure: -NH₂

      • During reactions: NH₂ + H^+
        ightarrow -NH₃^+

  5. Sulfhydryl Group

    • Structure: -SH

    • Not hydrophilic.

  6. Phosphate Group

    • Structure:

      • HO-C-O-P=O

      • Has two additional O atoms (OH on the sides).

    • Not reactive, not hydrophilic.

    • Functions more as a molecular label.

    • Example: Adenosine Triphosphate (ATP) acts as the energy currency within cells.

  7. Methyl Group

    • Structure: -CH₃

    • Non-reactive and not hydrophilic.

Summary of Key Concepts

  • The study of organic chemistry is crucial for understanding the diversity and complexity of biological compounds, primarily centered around carbon and its ability to form varied structural configurations through the use of functional groups.

  • The interaction of these functional groups influences the chemical properties and reactions of the molecules they compose, underscoring the significance of carbon in life processes and biochemical reactions.