Are These Substances Isomers?

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In summary, the conversation discusses isomers and their various forms. The pairs of substances listed are analyzed and the concept of isomers is defined and applied. The conversation also touches on the terms constitutional isomers, three-dimensional lattice, isotopes, and allotropes.
  • #1
mimi88
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Homework Statement


Which of the following pairs of substances are isomers?

Homework Equations



a. 35Cl and 37Cl
b. Hexane and benzene
c. Butane and methylpropane
d. Diamond and graphite

The Attempt at a Solution


Which one is right ?
 
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  • #2
What are your thoughts?

Start with the definition.
 
  • #3
I think it is C?? They look like sharing a different arrangement but same formula ??
 
  • #4
OK

Extra question: and how would you call forms listed in point A? D?
 
  • #5
Ah...A is constitutional isomers?? And D is three-dimensional lattice??
 
  • #6
Nope, take a step back and forget about isomers.

What do you call two different atoms with same number of protons but different numbers of neutrons?

When an element can exist is different forms, how do you call them?
 
  • #7
I this they are isotopes . Do you mean Allot-ropes for that element?
 
  • #8
Yes.
 
  • #9
Thank you so much ;)
 

1. What is an organic isomer?

An organic isomer is a molecule that has the same chemical formula as another molecule, but its atoms are arranged in a different way. Isomers can have different physical and chemical properties even though they have the same number of atoms.

2. What is the difference between structural and stereoisomers?

Structural isomers have a different bonding arrangement between atoms, while stereoisomers have the same bonding arrangement but differ in how the atoms are arranged in space.

3. How do organic isomers arise?

Organic isomers can arise due to differences in the bonding arrangements of atoms, such as double bonds or branching chains, or due to differences in the spatial arrangement of atoms, such as in geometric or optical isomers.

4. What is the significance of organic isomers in chemistry?

Organic isomers play a crucial role in drug development, as different isomers can have varying effects on the human body. They also help in the understanding of molecular structure and function, and aid in the synthesis of new compounds with desired properties.

5. How can one determine if two molecules are isomers?

To determine if two molecules are isomers, one can compare their molecular formulas and structural diagrams. If they have the same molecular formula but different structural diagrams, they are isomers. Additionally, techniques such as nuclear magnetic resonance (NMR) spectroscopy and X-ray crystallography can be used to confirm isomerism.

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