STRUCTURAL ISOMERS Chemistry 11 Atomic Theory 9 LEWIS

STRUCTURAL ISOMERS Chemistry 11 – Atomic Theory 9

LEWIS STRUCTURES: When drawing Lewis structures, there are compounds with the same chemical formulae that can take on more than one possible form/shape. When this occurs, we call it a structural isomer. For example, C 3 H 7 Cl has two possible structures:

LEWIS STRUCTURES: In each case, the total number of bonds formed is the same. Structural isomers are completely unique structures. So for example, these two structures are exactly the same:

TIPS: When writing structural isomers, keep in mind the following: Atom H, Cl, Br, I, F O, S N C # of bonds it usually contains

TIPS: When writing structural isomers, keep in mind the following: Atom H, Cl, Br, I, F O, S N C # of bonds it usually contains 1

TIPS: When writing structural isomers, keep in mind the following: Atom H, Cl, Br, I, F # of bonds it usually contains 1 O, S 2 N C

TIPS: When writing structural isomers, keep in mind the following: Atom H, Cl, Br, I, F # of bonds it usually contains 1 O, S 2 N 3 C

TIPS: When writing structural isomers, keep in mind the following: Atom H, Cl, Br, I, F # of bonds it usually contains 1 O, S 2 N 3 C 4

PRACTICE: Draw all structural isomers of the following: 1. C 3 H 5 F (3 isomers) 2. C 2 H 6 O (2 isomers)

ASSIGNMENT Worksheet