Skip to main content

Identify Functional Groups – 8 Practice Questions for Students and Cumulative Test (Full Atom Version)

Identify Each Functional Group (FULL ATOMS VERSION):      Functional groups can trip up any student who isn't paying close attention. Many functional groups look similar at a glance, but each has their own unique characteristics. Below are some functional groups that are commonly confused:     1) Amine VS Amide :           Amine:   Contains an NH₂ group.           Amide: Contains an  NH₂ group and a double-bonded oxygen on the same carbon. 👉 What is the difference between the two? An amide has a double-bonded oxygen; an amine does not. 2) Aldehyde VS Ketone:            Aldehyde: Has a double-bonded oxygen and a hydrogen attached to the same carbon, usually found at the end of a carbon chain.            Ketone: Has a double-bonded oxygen to a carbon that is connected to two other carbons, usually found in the middle of a...
Post a Comment

4 Types of Structural Formulas You Need to Know (Visual Chemistry Guide) -- Organic Chemistry


Different Structural Formulas with Examples

This section introduces the four basic types of structural formulas used in organic chemistry: 

    👉Lewis Structure

    👉Hybrid Structure

    👉Condensed Structure

    👉Line Drawing

These are presented in order of visual complexity -- starting from the most detailed to the most simplified. 
NOTE: This guide focuses on HOW each structure looks, rather than the rules for drawing them. The goal is to help you recognize and distinguish each from a glance.


1) Most DETAILED: Lewis structure
    Lewis structure shows ALL atoms and bonds (lines), including lone pairs and hydrogen bonds.

    NOTE: Lewis structures DO NOT need to always show lone pairs. If omitted, it's assumed the atom is neutral unless a formal charge (+ or -) is indicated.




2) Hybrid structure
    A hybrid structure shows all atoms, and all bonds (lines) between atoms-- EXCEPT for the bonds of hydrogen atoms.

    NOTE: Hybrid structures DO NOT need to always show lone pairs, lone pairs can be implied and omitted. Atoms are assumed neutral, UNLESS charges (+ or -) are indicated.




3) Condensed structure
    A condensed structure does not show any bonds (lines) between atoms. Instead, bonds are implied by putting atoms side by side.



        
4) Most SIMPLIFIED: Line drawing
    A line drawing (also called a skeletal structure) is the most simplified structure. It uses lines and angles to imply carbon atoms-- each point or end of line represent a carbon atom. Hydrogen atoms attach to the carbons. They are not shown, but are assumed to be present. 
REMEMBER: All carbons need four bonds. For any missing bonds, hydrogens are assumed to fill-in  All the other atoms are shown clearly.





Mini quiz:

Q1. What is the most complex structure of the four structures?
Q2. Which structure does not show any bonds between ANY atoms?
Q3. Which structure shows all bonds EXCEPT for hydrogen bonds?
Q4. Which is the most simplified drawing?

Labels:

Comments

Post a Comment

Popular posts from this blog

Haloalkanes Made Simple: What They Are & How They Form

Introduction to HALOALKANES This section simplifies haloalkanes in two parts:     1)  What are haloalkanes? 👉 Haloalkanes are an organic molecule made by combining  halogens and alkanes .          🔎 Halogen : A halogen is a reactive group of elements that include: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).           🔎 Alkane : An alkane is an organic molecule made only of carbon and hydrogen atoms , where all atoms are connected by single bonds  (one pair of shared electrons per bond).               ✵ Alkanes look like this: ❗NOW, combine halogens and alkanes  to create a haloalkane.                 ✵Haloalkanes look like this:     2)  How are haloalkanes created? 👉  Here's a simplified, personified version:            ...
Post a Comment
Read more

Quick Guide: Functional Groups in Organic Chemistry (Alcohols, Ketones, Aldehydes) with Examples

Quick Guide on Functional Groups The RED areas in the images   highlight the functional group.    WHY do we need to know functional groups?          F unctional groups largely determine a molecule's chemical and physical properties. In other words, they help us predict how molecules behave.    👉   Let's use a practical example:     You boil the same amount of alcohol and water in separate pots, which one would boil away faster?     Answer: Alcohol. Why? Alcohols typically have lower boiling points.      👉 Why is this useful?   Understanding functional group behaviors allows scientists to manipulate molecules based on how they behave.      👉  NOW, let's extend the practical example:     Both water and alcohol are added to the same pot, and we want to separate both of the liquids from each other-- what is the solution?       Answer: U...
Post a Comment
Read more