Benzene is less dense than water and is slightly soluble in water. Hence it floats on water. Benzene vapor is heavier than air.

876 kg/m³

Benzene boiling point at atmospheric pressure is 80 °C (176°F), and hence, benzene must be pressurized to remain liquid at higher temperatures than that. The output density is given as kg/m3, lb/ft3, lb/gal(US liq) and sl/ft3.

0.8765 g/mL

0.8787 g/mL

Benzene is a chemical that is a colorless or light yellow liquid at room temperature. It has a sweet odor and is highly flammable. Benzene evaporates into the air very quickly. Benzene dissolves only slightly in water and will float on top of water.

Benzene is produced naturally by volcanoes and forest fires. In homes, benzene may be found in glues, adhesives, cleaning products, paint strippers, tobacco smoke and gasoline.

The six carbon atoms form a perfectly regular hexagon. All of the carbon-carbon bonds have exactly the same lengths – somewhere between single and double bonds. There are delocalized electrons above and below the plane of the ring, which makes benzene particularly stable.

Polycyclic aromatic hydrocarbons consist of two or more benzene rings fused together.

The most commonly encountered aromatic compound is benzene. The usual structural representation for benzene is a six carbon ring (represented by a hexagon) which includes three double bonds. Each of the carbons represented by a corner is also bonded to one other atom.

one hydrogen atom

Many organic compounds contain rings of carbon atoms or other atoms such as oxygen or nitrogen. The most common ring compounds contain either 5 or 6 carbons. These compounds are also called cyclic.

In other words, a cycloalkane consists only of hydrogen and carbon atoms arranged in a structure containing a single ring (possibly with side chains), and all of the carbon-carbon bonds are single.

6-Membered benzene rings occur frequently in organic structures. Multiple benzene rings fused together are called polyaromatic hydrocarbons (PAH’s). You may have heard of PAH’s in the context of polluting components of soots and incomplete combustion, and indeed many are known carcinogens, including benzene itself.

: being or having an organic ring composed of carbon atoms.

The number of atoms present in a homocyclic compound can vary from 3 to many more. The common carbocycles include cycloalkanes (a a regular alkane with a ring or loop) and cycloalkenes (a type of alkene hydrocarbon which contains a closed ring of carbon atoms).

Abstract. Relatively new types of the modified nucleotides, namely carbocyclic sugars that are constrained to north or south (C2′ or C3′ exo) conformations, can be used for RNA nanoparticle design to control their structures and stability by rigidifying nucleotides and altering the helical properties of RNA duplexes.

noun. any of a group of organic chemical compounds in which all the atoms composing the ring are carbon atoms, as benzene or cyclopropane.

General aspects of heterocyclic compounds Pyrrole, furan, and thiophene molecules each contain five-membered rings, composed of four atoms of carbon and one atom of nitrogen, oxygen, or sulfur, respectively. Thiophene, a sulfur heterocycle, resembles benzene in its chemical and physical properties.

The rings present in furan and pyridine contain oxygen and nitrogen atoms respectively. Hence, these compounds contain heterocyclic rings and not carbocyclic rings.

Benzene, a 6-membered carbocyclic compound. methine hydrogens shown, and 6 electrons shown as delocalized through drawing of circle (aromatic).

The six-membered ring in benzene is a perfect hexagon (all carbon-carbon bonds have an identical length of 1.40 Å). The cyclohexatriene contributors would be expected to show alternating bond lengths, the double bonds being shorter (1.34 Å) than the single bonds (1.54 Å).

Benzene is the parent compound of the large family of organic compounds known as aromatic compounds. Naming of aromatic compound i.e. benzene rings with different substituents is described.

A heterocyclic compound or ring structure is a cyclic compound that has atoms of at least two different elements as members of its rings. Phenol has one hydroxy group outside the carbon ring and aniline has one nitrogen atom outside the carbon ring. So they are not heterocyclic compound.

phenol

• Bisphenol A.
• Chlorophenol.
• Picric acid.
• Salicylic acid.
• Cresol.
• Naphthol.
• Resorcinol.
• Pyrogallol.

Acidity of Phenols Phenols are stronger acids than alcohols, but they are still quite weak acids. A typical alcohol has a pKa of 16–17. In contrast, phenol is 10 million times more acidic: its pKa is 10.

Hence, phenol is more acidic than water.

None of the strong acids traditionally listed in a chemistry text holds the title of World’s Strongest Acid. The record-holder used to be fluorosulfuric acid (HFSO3), but the carborane superacids are hundreds of times stronger than fluorosulfuric acid and over a million times stronger than concentrated sulfuric acid.

Therefore, in the gas-phase, t-butanol is the most acidic alcohol, more acidic than isopropanol, followed by ethanol and methanol. In the gas phase, water is much less acidic than methanol, which is consistent with the difference in polarizibility between a proton and a methyl group.

Phenol is more acidic than water because penoxide ion ( conjugate base of phenol) is more stable than hydroxide ion ( conjugate base of water ) due to resonance effect of benzene ring . Phenol is too more acidic than water due to ph value 5-6 but water has 7.