La química orgánica | ¿Qué es? ¿Qué estudia? y ¿Cómo surgió?
What is Organic Chemistry?
Introduction to Organic Chemistry
- Organic chemistry is a vast and intriguing science that encompasses almost everything in the universe, excluding light waves. It represents an advanced level of understanding compared to inorganic chemistry.
- The concept of organic chemistry was first proposed by Jean-Jacques de Vaucel in 1807, who observed significant differences between compounds found in living organisms and those in inanimate objects.
Historical Context
- Initially, it was believed that organic compounds, like vitamins, could only be produced within living organisms due to a supposed "vital force." This notion changed dramatically in 1828 when Friedrich Wöhler synthesized urea artificially without any living organism.
- Following this breakthrough, the definition of organic chemistry evolved; by 1861, German chemist August Kekulé defined it as the study of carbon-containing compounds—a definition still relevant today.
Characteristics of Organic Compounds
- Today, organic compounds are identified primarily by their carbon content; exceptions include carbon monoxide, carbon dioxide, and certain carbonates and bicarbonates. Generally, they also contain hydrogen atoms along with other elements such as oxygen and nitrogen.
- Carbon's unique ability to form chains with itself allows for complex structures that can be larger and more intricate than inorganic compounds. This complexity stems from several special characteristics of carbon atoms:
Special Properties of Carbon Atoms
- Electronegativity: Carbon has intermediate electronegativity which enables it to form covalent bonds with both metals and non-metals effectively.
- Size: Its small size facilitates the formation of double and triple bonds, increasing the variety of possible compounds.
- Chain Formation: Carbon can create long chains or rings with itself due to its tetravalency—capable of forming four bonds simultaneously—making it fundamental to organic chemistry despite its complexity.
Differences Between Organic and Inorganic Compounds
- Organic compounds typically do not dissolve in water but are soluble in organic solvents like acetone or benzene; conversely, inorganic compounds usually dissolve well in water but not in organic solvents.
- Most organic substances are flammable (e.g., gasoline), while many inorganic substances are not prone to combustion; some even serve as fire suppressants (like water). Additionally, organic compounds generally decompose at lower temperatures compared to inorganic ones.
- The reactivity rate for organic compounds tends to be slower requiring more energy for reactions compared to inorganic counterparts which often have ionic bonds rather than covalent ones prevalent in organics. Lastly, there is a vast diversity within organic materials—over 24 million known versus approximately 600 thousand inorganic ones today!
Importance of Organic Chemistry