lewis - 3 PAIRS of ELECTRONS shared between ATOMS is called...

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Lewis Electron Dot Structures For ATOMS with Z 10, such structures are governed by the OCTET RULE: The number of BONDS formed can be determined by noting that ATOMS with Z 10 tend, when present in molecules, to achieve a RARE GAS ELECTRONIC CONFIGURATION ([He] = 1s 2 or [Ne] = 1s 2 2s 2 2p 6 ) through GAINING, GIVING UP or SHARING of ELECTRONS. Although somewhat limited in scope, this rule covers a great deal of important chemistry. We must allow the following options to satisfy the OCTET RULE. • REMOVE and/or ADD electrons from ONE or MORE ATOMS • INTRODUCE MULTIPLE BONDS 1 PAIR of ELECTRONS shared between ATOMS is called a SINGLE BOND 2 PAIRS of ELECTRONS shared between ATOMS is called a DOUBLE BOND
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Unformatted text preview: 3 PAIRS of ELECTRONS shared between ATOMS is called a TRIPLE BOND Systematic Procedure for Constructing Lewis Electron Dot Structures (valid for Z 10) 1. Count the number of VALENCE ELECTRONS 2. Draw a TRIAL structure in which ALL BONDS ARE SINGLE AND ALL ATOMS OBEY THE OCTET RULE 3. Compare the number of electrons used in the TRIAL structure with the actual number AVAILABLE 4. If TOO MANY electrons have been used in the TRIAL structure introduce sufficient DOUBLE and/or TRIPLE BONDS to eliminate the SURPLUS 2 ELECTRONS are ELIMINATED for EACH DOUBLE BOND INTRODUCED 4 ELECTRONS are ELIMINATED for EACH TRIPLE BOND INTRODUCED...
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This document was uploaded on 03/03/2012.

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