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Capitolo 3

Alcani e cicloalcani

Struttura degli alcani
Struttura degli alcani
The formation of carbon-carbon bonds leading to the creation of the carbon chain is the basis of organic chemistry. August Kekulé and Archibald Scott ...
Isomeri costituzionali degli alcani
Isomeri costituzionali degli alcani
Organic compounds of the same molecular formula can have different structural formulas called constitutional isomers, and the phenomenon is known as ...
Nomenclatura degli alcani
Nomenclatura degli alcani
In the late 19th-century, the number of new chemical compounds discovered increased tremendously. Hence, the necessity arose to develop a naming system ...
Proprietà fisiche degli alcani
Proprietà fisiche degli alcani
Alkanes are nonpolar molecules due to the presence of only carbon and hydrogen atoms. The electronegativity difference between carbon and hydrogen is ...
Proiezioni di Newman
Proiezioni di Newman
Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used ...
Conformazioni di etano e propano
Conformazioni di etano e propano
In an organic molecule, free rotation about the carbon-carbon single bond results in energetically different conformers of the molecule. Due to this ...
Conformazioni del butano
Conformazioni del butano
Unlike ethane and propane that have only two major conformations, butane has more than two conformers. The staggered form of butane in which the bulky ...
Cicloalcani
Cicloalcani
Cycloalkanes are saturated cyclic hydrocarbons with carbon atoms arranged in the form of rings. They have two fewer hydrogen atoms than the corresponding ...
Conformazioni dei cicloalcani
Conformazioni dei cicloalcani
Adolf von Baeyer attempted to explain the instabilities of small and large cycloalkane rings using the concept of angle strain — the strain caused ...
Conformazioni del cicloesano
Conformazioni del cicloesano
Cyclohexane does not exist in a planar form due to the high angle and torsional strain it would experience in the planar structure. Instead, it adopts ...
Conformazione a sedia del cicloesano
Conformazione a sedia del cicloesano
The chair conformation is the most stable form of cyclohexane due to the absence of angle and torsional strain. The absence of angle strain is a result of ...
Stabilità dei cicloesani sostituiti
Stabilità dei cicloesani sostituiti
This lesson discusses the stability of substituted cyclohexanes with a focus on energies of various conformers and the effect of 1,3-diaxial ...
CIcloesani disostituiti: isomeria <em>cis-trans</em>
CIcloesani disostituiti: isomeria cis-trans
Depending upon the different spatial orientation of the substituents, the disubstituted cycloalkanes exhibit two types of stereoisomers. The cis isomers ...
Energia di combustione: una misura di stabilità in alcani e cicloalcani
Energia di combustione: una misura di stabilità in alcani e cicloalcani
The low reactivity in alkanes can be attributed to the non-polar nature of C–C and C–H σ bonds. Alkanes, therefore, were  initially ...
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