Table of Contents
What is Carbanion?
A carbanion is an anion of carbon. It is a negatively charged carbon atom that is attached to a variety of different molecules. Carbanions are important in organic chemistry, and they are often used to form carbon-carbon bonds.
Carbanion Explained
A carbanion is an anion formed by the removal of a hydrogen atom from a carbon atom, usually in an organic molecule. A carbocation is a related cation.
The presence of a carbanion in an organic molecule usually indicates that the molecule is in its acidic form. The carbanion has a negative charge and is attracted to the positive charge of the carbocation.
Occurrence and Properties
Gold is a chemical element with the symbol Au and atomic number 79. It is a dense, soft, malleable, and ductile metal with a bright yellow color. It is one of the least reactive metals and is solid under standard conditions. Gold often occurs in free elemental (native) form, as nuggets or grains, in rocks, in veins, and in alluvial deposits. It occurs in a solid solution series with the native element silver and also naturally alloyed with copper and palladium. Less commonly, it occurs in minerals as gold compounds, often with tellurium (gold tellurides).
Gold is resistant to most acids, though it does dissolve in aqua regia, a mixture of nitric acid and hydrochloric acid. Gold also dissolves in alkaline solutions of cyanide. Gold is insoluble in nitric acid, which dissolves silver and base metals.
Gold has a density of 19.3 g/cm3, almost identical to that of tungsten at 19.25 g/cm3. By comparison, the density of lead is 11.3 g/cm3.
Gold is a good conductor of heat and electricity and is non-toxic.
Carbon Acids
A carbon acid is an acid that contains carbon in its structure. There are many different types of carbon acids, and they can be found in many different places. Some of the most common carbon acids include acetic acid, which is found in vinegar, and carbonic acid, which is found in carbonated beverages.
Chirality of Carbanions
The chirality of carbanions is determined by the chirality of the carbon atom to which the negative charge is attached. If the carbon atom is sp3 hybridized, the carbanion is achiral. If the carbon atom is sp2 hybridized, the carbanion is chiral.
Preparation of Carbanion
A carbanion is an anion derived from a carbon atom. The simplest carbanion is the methyl anion, CH 3 −. It can be obtained by deprotonation of methyl alcohol, CH 3 OH, with a strong base such as sodium hydride.
The methyl anion is a weak base and is therefore unstable. It can be protonated to form the methyl cation, CH 3 +.
LEWIS STRUCTURE
OF PINACOL
The Lewis structure of pinacol is:
The Lewis structure of pinacol shows that it contains one central carbon atom bonded to four other carbon atoms. There are also two hydrogen atoms bonded to the central carbon atom.
:
1.1.1.1
1.1.1.2
1.1.1.3
1.1.1.4
1.1.2.1
1.1.2.2
1.1.2.3
1.1.2.4
