Benzene
Benzene is dull and highly capable of burning liquid with a sweet odor. Which is an organic chemical compound with the molecular formula C6H6, containing a ring of six carbon atoms, each with single and double bonds between them. The unique structure often represent as a hexagon with a circle inside to denote the electrons.
Effects on the Body
When benzene got off the charts, people used it in the production of plastics, resins, synthetic fibers, rubber, lubricants, dyes, detergents, and pesticides. Therefore, the exposure to the chemical can have harmful effects on the body. The chemical is off the charts because of the use of the chemical it is in use in many ways.
Examples
- Cancer: Long-term exposure to benzene is link to increase risk of developing leukemia, acute myeloid leukemia. It is classified as a Group 1 carcinogen by the International Agency for Research on Cancer.
- Blood Disorders: Its exposure affects the bone marrow’s ability to produce blood cells, leading to conditions like aplastic anemia, which is a serious and sometimes fatal blood disorder characterized by a decrease in red and white blood cells and platelets.
- Immune System Effects: Its exposure may defeat the immune system, making individuals open to infections and illnesses.
- Reproductive Effects: Its exposure is associates with generative problems like decreased fertility, menstrual disorders, and adverse pregnancy outcomes.
- Neurological Effects: Studies suggest that the chemical exposure may have neurotoxic effects, potentially leading to cognitive impairment and nervous system disorders.
The Discovery
The discovery of benzene when if first got off the charts credit is to the Scottish chemist Michael Faraday in 1825. Faraday gets the chemical from the oily residue by heating whale oil (a type of triglyceride oil derived from whale blubber) in the absence of air. He name the substance “bicarburet of hydrogen” because its empirical formula is determine to be C₆H₆. The structural explanation of the chemical came later, in the mid-19th century. In 1834, the German chemist Eilhard Mitscherlich observed that the chemical goes through a subtract reaction with chlorine to form a single compound, suggesting that the chemical contained a symmetrical arrangement of carbon atoms.
The Breakout
August Kekulé, a German scientist, set the notion of the chemical ring in 1865. So, 1865 marked the chemical for in understanding of the structure of the compound. He famously explained his inspiration for this notion. It came to him in a dream about a snake grabbing its own tail, symbolizing the chemical cyclic structure. Kekulé’s suggestion of the chemical ring structure set the basis for contemporary organic chemistry and transformed our knowledge of aromatic chemicals.
Subsequent study confirms Kekulé’s concept, and the chemical is now recognized as a six-membered ring with three double bonds in a delocalized π-electron system. So, its discovery and structural explanation were key milestones in the history of benzene coming off the charts.
How is it a Molecule?
- Atoms: Benzene is made up of carbon and hydrogen atoms. Carbon has four valence electrons, while hydrogen has one valence electron.
- Covalent Bonds: The carbon atoms in the chemical form covalent bonds with each other and with hydrogen atoms. Covalent bonds forms by sharing pairs of electrons between atoms.
- Hexagonal Ring: The six carbon atoms in the chemical are arranged in a hexagonal ring, with each carbon atom forming single covalent bonds with two other carbon atoms and one hydrogen atom. This creates a stable ring structure.
- Delocalized Electrons: The unique aspect of benzene is its delocalized π (pi) electrons, which shares across all six carbon atoms in the ring. This delocalization occurs due to the resonance stabilization of benzene, where the electrons cannot confine to specific bonds but are spread out evenly throughout the ring.
- Aromaticity: Benzene exhibits aromaticity, which is a property of certain cyclic compounds with alternating single and double bonds. Aromatic compounds like the chemical are exceptionally stable and have distinct chemical properties compared to non-aromatic compounds.
- Molecular Formula: The molecular formula C6H6 represents the composition of benzene, indicating that it contains six carbon atoms and six hydrogen atoms in each molecule.
Helpfulness
- Solvents: Benzene is a powerful solvent and in use for various industrial processes to dissolve other substances. However, due to its toxicity, its use as a solvent has significantly decrease, and safer alternatives are often preferred.
- Fuel Additive: Benzene was historically used as an octane booster in gasoline. However, its use as a fuel additive has decreased due to environmental and health concerns.
- Laboratory and Research: Benzene are in use to laboratories and research facilities as a reagent and solvent for chemical reactions and experiments.
- Aromatics Industry: Benzene is a crucial component of the aromatics industry, where it serves as a building block for producing other aromatic compounds like toluene, xylene, and phenol.
- Herbicides and Pesticides: Benzene derivatives are in use for the manufacturing of herbicides, pesticides, and insecticides.
- Art and Photography: Benzene is historically use for the production of certain art materials and as a solvent in photographic processes. However, its use in these applications has declined due to health and safety concerns.
Written by Thamara Dunlap
Sources:
BYJU’S – C6H6
The Faraday Institute for Science and Religion – Michael Faraday
Nature – 1825 chemical discoveries
Featured Image Courtesy of Ian Jacobs‘s Flickr Page – Creative Commons License
Inset Image Courtesy of Elliott Brown‘s Flickr Page – Creative Commons License
