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Related Concept Videos

Electrophilic Aromatic Substitution: Chlorination and Bromination of Benzene01:15

Electrophilic Aromatic Substitution: Chlorination and Bromination of Benzene

Chlorination and bromination are important classes of electrophilic aromatic substitutions, where benzene reacts with chlorine or bromine in the presence of a Lewis acid catalyst to give halogenated substitution products. A Lewis acid such as aluminium chloride or ferric chloride catalyzes the chlorination, and ferric bromide catalyzes the bromination reactions. During the bromination of alkenes, bromine polarizes and becomes electrophilic. However, in the bromination of benzene, the bromine...
Structure of Benzene: Kekulé Model01:07

Structure of Benzene: Kekulé Model

In 1865, August Kekule suggested the structure of benzene according to the structural theory of organic chemistry based on the three assertions—formula of benzene is C6H6, all the hydrogens of benzene are equivalent, and each carbon must have four bonds due to its tetravalency.
He proposed that benzene has a cyclic structure of six carbon atoms attached to one hydrogen atom each, with three alternating pi bonds.
Electrophilic Aromatic Substitution: Nitration of Benzene01:20

Electrophilic Aromatic Substitution: Nitration of Benzene

The nitration of benzene is an example of an electrophilic aromatic substitution reaction. It involves the formation of a very powerful electrophile, the nitronium ion, which is linear in shape. The reaction occurs through the interaction of two strong acids, sulfuric and nitric acid.
NMR Spectroscopy of Benzene Derivatives01:37

NMR Spectroscopy of Benzene Derivatives

Simple unsubstituted benzene has six aromatic protons, all chemically equivalent. Therefore, benzene exhibits only a singlet peak at δ 7.3 ppm in the 1H NMR spectrum. The observed shift is far downfield because the aromatic ring current strongly deshields the protons. Any substitution on the benzene ring makes the aromatic protons nonequivalent, and the protons split each other. The peak is, therefore, no longer a singlet and the splitting pattern and their associated coupling constants depend...
Disorders of Leukocytes01:27

Disorders of Leukocytes

Leukocyte disorders can lead to either leukopenia, characterized by an abnormally low leukocyte count, or leukocytosis, marked by a very high leukocyte number.
Leukopenia may result from bone marrow disorders, autoimmune diseases, and infectious diseases. For example, conditions such as multiple myeloma and aplastic anemia can impair the bone marrow's ability to produce adequate leukocytes. Similarly, autoimmune diseases like lupus and viral infections such as HIV can prompt the immune system...
Reactions at the Benzylic Position: Oxidation and Reduction00:59

Reactions at the Benzylic Position: Oxidation and Reduction

The benzylic position describes the position of a carbon atom attached directly to a benzene ring. Benzene by itself does not undergo oxidation. In contrast, the benzylic carbon is quite reactive in the presence of strong oxidizing agents such as KMnO4 or H2CrO4. Therefore, alkylbenzenes are readily oxidized to benzoic acid, irrespective of the type of alkyl groups.

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Related Experiment Video

Updated: May 17, 2026

Chromosomics: Detection of Numerical and Structural Alterations in All 24 Human Chromosomes Simultaneously Using a Novel OctoChrome FISH Assay
06:25

Chromosomics: Detection of Numerical and Structural Alterations in All 24 Human Chromosomes Simultaneously Using a Novel OctoChrome FISH Assay

Published on: February 6, 2012

Leukemia and benzene.

Robert Snyder1

  • 1Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Environmental and Occupational Health Sciences Institute, Rutgers the State University of New Jersey, Piscataway, NJ 08854, USA. rsnyder@eohsi.rutgers.edu

International Journal of Environmental Research and Public Health
|October 16, 2012
PubMed
Summary
This summary is machine-generated.

Benzene exposure damages bone marrow, causing aplastic anemia and leukemia. Research is shifting focus from identifying toxic benzene metabolites to understanding how they alter bone marrow cell biology for better leukemia prevention.

Keywords:
benzenebenzene metabolismbone marrowcancer stem cellscell signalingcytokinesleukemianichesignal transductionstem cells

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Area of Science:

  • Toxicology
  • Hematology
  • Cancer Biology

Background:

  • Benzene exposure is a known cause of bone marrow damage, leading to aplastic anemia and leukemia.
  • The precise mechanisms by which benzene induces leukemia are not fully understood.
  • Leukemias similar to those induced by benzene can arise after treatments like alkylating agents, suggesting shared pathways.

Purpose of the Study:

  • To critically dissect the subtle mechanisms of benzene-induced leukemia.
  • To investigate the role of stem cell "niches" in leukemia initiation.
  • To understand how benzene metabolites alter bone marrow cell biology.

Main Methods:

  • Review of existing literature on benzene toxicity and leukemia.
  • Analysis of stem cell biology and signaling pathways in the bone marrow.
  • Focus on the impact of benzene metabolites on cellular processes.

Main Results:

  • Benzene metabolites are implicated in bone marrow injury and leukemogenesis.
  • Stem cell "niches" may harbor cells that initiate leukemia.
  • Cellular signaling and checkpoint evasion are crucial in the development of leukemia.

Conclusions:

  • Understanding how benzene metabolites alter bone marrow cell biology is critical.
  • Further research into stem cell niches and cellular signaling is needed to elucidate benzene-induced leukemogenesis.