Write plausible Lewis structures for the following free radicals: (a) ·C2 H5 ; (b) HO2 "; (c) Cl

step 1 So here we're just drawing out Lewis structures for the following radical species. So just for s

Write plausible Lewis structures for the following free...

Key Concepts

Lewis Structures

Lewis structures are diagrams that represent the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule. They are constructed by placing electrons around atoms according to specific rules and are used to predict the arrangement of atoms, molecular geometry, and reactivity in chemical species.

Free Radicals

Free radicals are molecules or ions that have an unpaired electron, making them highly reactive. This unpaired electron typically arises because the total number of valence electrons is odd, which can lead to unique challenges in drawing accurate Lewis structures while still obeying common bonding rules.

Valence Electrons

Counting valence electrons is the first crucial step in constructing Lewis structures. It involves summing the number of electrons available for bonding from each atom in the molecule, which allows you to determine how the electrons can be distributed among bonds and lone pairs, especially when there is an odd number leading to radicals.

Octet Rule

The octet rule states that atoms tend to gain, lose, or share electrons in such a way that they achieve a complete set of eight electrons in their valence shell. While this rule is a helpful guideline for predicting molecular structure and stability, there are exceptions such as free radicals and molecules involving atoms from the third period and beyond where expanded octets are possible.

Formal Charges

Formal charge calculations provide a method for assessing the distribution of electrons in a molecule relative to an assumed equal sharing in bonds. This concept is particularly useful in Lewis structure determination because it helps in choosing the most stable structure among several possibilities by minimizing unnecessary charges and placing negative charges on more electronegative atoms.

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