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[18]Annulene

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Identification
Molecular formula
C18H18
CAS number
941-98-0
IUPAC name
heptacyclo[18.6.2.02,15.04,13.06,11.017,27.024,28]octacosa-1(27),2,4,6,8,10,12,14,16,18,20(28),21,23,25-tetradecaene
State
State

At room temperature, [18]Annulene is found as a solid. Its molecular structure allows it to exist in a stable crystalline form at ambient conditions.

Melting point (Celsius)
179.00
Melting point (Kelvin)
452.15
Boiling point (Celsius)
285.00
Boiling point (Kelvin)
558.15
General information
Molecular weight
234.37g/mol
Molar mass
234.3650g/mol
Density
1.1540g/cm3
Appearence

[18]Annulene is a dark green crystalline solid. It often appears as flat, platelike crystals due to its planar conformation. In solution, it can exhibit different colors depending on the solvent and concentration.

Comment on solubility

Solubility of Heptacyclo[18.6.2.02,15.04,13.06,11.017,27.024,28]octacosa-1(27),2,4,6,8,10,12,14,16,18,20(28),21,23,25-tetradecaene

The solubility of heptacyclo[18.6.2.02,15.04,13.06,11.017,27.024,28]octacosa-1(27),2,4,6,8,10,12,14,16,18,20(28),21,23,25-tetradecaene is influenced by several factors, primarily due to its complex cyclic structure and hydrophobic nature. Here are some key points to consider:

  • Polarity: This compound exhibits a low polarity which typically results in poor solubility in polar solvents like water.
  • Solvent Compatibility: It tends to be more soluble in non-polar organic solvents, such as:
    • Hexane
    • Toluene
    • Chloroform
  • Cyclic Structure: The intricate cyclic arrangement contributes to a tendency to aggregate, further diminishing solubility in certain environments.
  • Temperature Effects: Increasing the temperature may enhance solubility in non-polar solvents due to increased molecular motion.

In summary, while heptacyclo[18.6.2.02,15.04,13.06,11.017,27.024,28]octacosa-1(27),2,4,6,8,10,12,14,16,18,20(28),21,23,25-tetradecaene is generally insoluble in water, it demonstrates better solubility characteristics in non-polar solvents.

Understanding the solubility profile of this compound is vital for its applications in chemical research and synthesis.

Interesting facts

Interesting Facts about Heptacyclo[18.6.2.02,15.04,13.06,11.017,27.024,28]octacosa-1(27),2,4,6,8,10,12,14,16,18,20(28),21,23,25-tetradecaene

The compound known as Heptacyclo[18.6.2.02,15.04,13.06,11.017,27.024,28]octacosa-1(27),2,4,6,8,10,12,14,16,18,20(28),21,23,25-tetradecaene is a fascinating member of the world of polycyclic compounds. Here are some intriguing aspects of this compound:

  • Structural Complexity: This compound features a highly intricate structure, showcasing a mosaic of interconnected rings. The presence of such multiple cycles contributes to its unique chemical properties.
  • Potential Applications: Due to its structural characteristics, it may be investigated for use in advanced materials, organic electronics, or even in the development of novel medicinal compounds.
  • Isomerism: The compound exemplifies the concept of isomerism, with multiple ways to arrange carbon atoms. This is an important idea in organic chemistry that affects the compound's reactivity and physical properties.
  • Synthetic Challenges: The synthesis of this compound may pose significant challenges, often requiring innovative techniques and methods to construct its complex framework.
  • Visual Appeal: The intricate geometric shapes formed by the carbon rings make its chemical representation not only scientifically interesting but also visually striking. In the world of chemistry, beauty often lies in complexity!

This compound stands as a testament to the astonishing diversity and creativity inherent in organic chemistry. As a chemistry student or scientist, exploring such molecules not only broadens your knowledge but also sparks inspiration for future research endeavors. The study of polycyclic compounds like this one can lead to significant breakthroughs in various scientific fields.

Synonyms
NAPHTHO(2,1,8-UVA)PENTACENE
196-45-2
Naphtho[2,1,8-uva]pentacene
DTXSID00173263
naphtho(8,1,2-cde)pentacene
DTXCID0095754