Podcast
Questions and Answers
What is the defining characteristic of isomers?
What is the defining characteristic of isomers?
- Different elements but same properties
- Same number of atoms and no relation in properties
- Same molecular formula but different structures (correct)
- Different molecular formulas but same structure
What is the difference between structural isomers?
What is the difference between structural isomers?
- Number of atoms
- Type of elements
- Molecular weight
- Arrangement of atoms (correct)
Which of the following is an example of structural isomerism, differing in the chain type?
Which of the following is an example of structural isomerism, differing in the chain type?
- Functional isomerism
- Chain isomerism (correct)
- Tautomerism
- Positional isomerism
What distinguishes positional isomers?
What distinguishes positional isomers?
What is the difference between functional isomers?
What is the difference between functional isomers?
What is the main characteristic of tautomerism?
What is the main characteristic of tautomerism?
Stereoisomers are differences in arrangement specifically in?
Stereoisomers are differences in arrangement specifically in?
What are the 2 main types of streoisomers?
What are the 2 main types of streoisomers?
What gives rise to conformational isomers?
What gives rise to conformational isomers?
How does the stability of trans isomers compare to cis isomers?
How does the stability of trans isomers compare to cis isomers?
What is key to assigning priority based on the 'E' and 'Z' system of nomenclature?
What is key to assigning priority based on the 'E' and 'Z' system of nomenclature?
What does "E" represent in the E and Z system?
What does "E" represent in the E and Z system?
What is the name of the process that uses polarized light to interact molecules in different ways?
What is the name of the process that uses polarized light to interact molecules in different ways?
What are interactions with plane polarized light termed?
What are interactions with plane polarized light termed?
If a compound rotates plane-polarized light to the right, it is?
If a compound rotates plane-polarized light to the right, it is?
What is a key requirement for tetrahedral molecules to qualify as optically active?
What is a key requirement for tetrahedral molecules to qualify as optically active?
What term is used for the central atom in an optically active compound?
What term is used for the central atom in an optically active compound?
What is another term for optically active?
What is another term for optically active?
What are isomers that are mirror images of each other called?
What are isomers that are mirror images of each other called?
How many optically active molecules result from a molecule with one asymmetric carbon?
How many optically active molecules result from a molecule with one asymmetric carbon?
What term describes non-mirror image stereoisomers?
What term describes non-mirror image stereoisomers?
What is described as a meso compound?
What is described as a meso compound?
What is a racemic mixture?
What is a racemic mixture?
What process separates racemic mixtures?
What process separates racemic mixtures?
What components are needed for a polarimeter?
What components are needed for a polarimeter?
What is the component D-line of sodium in polarimetry?
What is the component D-line of sodium in polarimetry?
What term describes the rotation by 1.0g of an optically active substance in 1.0ml?
What term describes the rotation by 1.0g of an optically active substance in 1.0ml?
Which describes the role of functional groups?
Which describes the role of functional groups?
What type of reaction forms hemiacetals and hemiketals?
What type of reaction forms hemiacetals and hemiketals?
What characterises a nucleophile?
What characterises a nucleophile?
What characterises an electrophile?
What characterises an electrophile?
What is an open system in thermodynamics?
What is an open system in thermodynamics?
What happens in a closed thermodynamic system?
What happens in a closed thermodynamic system?
What is an isolated system?
What is an isolated system?
What is the definition of 'work' for the first law of thermodynamics?
What is the definition of 'work' for the first law of thermodynamics?
What is the definition of 'enthalpy'?
What is the definition of 'enthalpy'?
When is a reaction condisered exothermic?
When is a reaction condisered exothermic?
The measure of disorder is?
The measure of disorder is?
What does free energy measure?
What does free energy measure?
Flashcards
What are isomers?
What are isomers?
Compounds with the same molecular formula but different structural arrangements.
What are structural isomers?
What are structural isomers?
Isomers that differ in how constituent atoms are connected.
What is chain isomerism?
What is chain isomerism?
Structural isomers differing in the arrangement of the carbon chain.
What is positional isomerism?
What is positional isomerism?
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What is functional isomerism?
What is functional isomerism?
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What is tautomerism?
What is tautomerism?
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What are stereoisomers?
What are stereoisomers?
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What are conformational isomers?
What are conformational isomers?
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What are configurational isomers?
What are configurational isomers?
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What are geometric isomers?
What are geometric isomers?
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What is the E/Z system?
What is the E/Z system?
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What are optical isomers?
What are optical isomers?
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What is a chiral center?
What is a chiral center?
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What are enantiomers?
What are enantiomers?
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What is a racemic mixture?
What is a racemic mixture?
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What is resolution?
What is resolution?
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What is affinity chromatography?
What is affinity chromatography?
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What are same physical properties?
What are same physical properties?
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What is a polarimeter?
What is a polarimeter?
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What is a functional group?
What is a functional group?
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What is a hemiacetal?
What is a hemiacetal?
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What is a hemiketal?
What is a hemiketal?
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What is an acetal?
What is an acetal?
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What is a ketal?
What is a ketal?
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What is nucleophilic addition?
What is nucleophilic addition?
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What is thermodynamics?
What is thermodynamics?
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What is a universe (thermodynamic)?
What is a universe (thermodynamic)?
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What is an open system?
What is an open system?
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What is a closed system?
What is a closed system?
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What is an isolated system?
What is an isolated system?
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What is heat?
What is heat?
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What is a state function?
What is a state function?
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What is an extensive property?
What is an extensive property?
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What is an intensive property?
What is an intensive property?
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What is enthalpy?
What is enthalpy?
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What is entropy?
What is entropy?
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What is free energy?
What is free energy?
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What is a coupled reaction?
What is a coupled reaction?
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What are energy-rich compounds?
What are energy-rich compounds?
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Study Notes
- Course outlines includes the lecture, topic, and date
- The lectures include elemental composition of cells, atomic structure (1 and 2), types of chemical bonds (1 and 2), isomerism, thermodynamics (1 and 2), chemical kinetics, carbohydrates, and revision
Isomerism
- Isomers are compounds that share a molecular formula but have different structural representations
Structural Isomerism
- Structural isomers vary in the way their constituent atoms are connected
- Chain isomerism differs in the chain type; for example, C4H10
- Functional isomerism differs in the functional groups; for example, CH3CH2OH, ethanol, and CH3-O-CH3, ether
- Positional isomerism differs in the placement of the functional group
- Tautomerism describes functional groups in dynamic equilibrium where isomers are mutually interconvertible
Stereoisomerism
- This term describes the differences in the arrangement of atoms in the three-dimensional space of a compound
- There are two types of stereoisomers: conformational/rotational and configurational
Conformational or Rotational Stereoisomerism
- Involves the arrangement of different atoms
- Results from the possibility of free rotation around a C-C single covalent bond
- Individual structures are conformers
- There are two types of conformers: eclipsed and staggered
Configurational Stereoisomerism
- There are two types: geometric and optical
- Geometric (cis and trans) isomers feature a trans isomer that is more stable than the cis isomer due to the bulky groups being further apart
- Ring compounds can create rigid molecules, leading to geometric isomerism; for example, 1,2-dimethylcyclopropane
E and Z System of Nomenclature
- In E and Z isomers, there are three or four different groups attached to the C=C bond
- E represents across while, Z represents together
- System is based on assigning priorities, where the highest atomic number receives the highest priority
- F<Cl
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