Identify the correct statements (a) The stereisomers which...

Identify the correct statements (a) The stereisomers which are not mirror images are diastereomers. (b) Diasteteomers have the same physical properties like melting point and solubility (c) Cis isomer has higher melting point and lower solubility than the corresponding trans isomer (d) $\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{COCH}_{3}$ exists more in enolic form in gaseous phase or in $\mathrm{n}$ - hexane.

Identify the correct statements
(a) The stereisomers which are not mirror images are diastereomers.
(b) Diasteteomers have the same physical properties like melting point and solubility
(c) Cis isomer has higher melting point and lower solubility than the corresponding trans isomer
(d) $\mathrm{CH}_{3} \mathrm{COCH}_{2} \mathrm{COCH}_{3}$ exists more in enolic form in gaseous phase or in $\mathrm{n}$ - hexane.

Key Concepts

Stereoisomerism

Stereoisomerism refers to the phenomenon where compounds have the same molecular formula and sequence of bonded atoms but differ in the three-dimensional orientations of their atoms. This concept distinguishes between enantiomers, which are non-superimposable mirror images, and diastereomers, which are stereoisomers that are not mirror images of each other.

Diastereomers

Diastereomers are a subtype of stereoisomers that are not mirror images. They typically have different physical and chemical properties, such as melting points and solubility, because their spatial arrangements lead to different intermolecular interactions and packing efficiencies.

Cis-Trans Isomerism

Cis-trans isomerism is a form of stereoisomerism that occurs due to restriction of rotation around a bond (often a double bond or within a ring structure), resulting in distinct 'cis' (same side) and 'trans' (opposite side) configurations. These configurations usually impart varying physical properties, including differences in melting points and solubility characteristics.

Enol-Keto Tautomerism

Enol-keto tautomerism is a type of chemical equilibrium in which compounds containing carbonyl groups interconvert between the keto form and the enol form. The balance between these tautomers can be influenced by external factors such as the surrounding medium (e.g., gas phase, solvents like n-hexane) due to differences in stabilization provided by various phases.

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