![]() The displayed formula could be written as either of these:īut, again these are exactly the same. Consider a slightly more complicated molecule, C 2H 5Cl. ![]() One structure is in reality a simple rotation of the other one. ![]() But these two structures are actually exactly the same. The chlorines could be opposite each other or at right angles to each other. You might think that there were two different ways of arranging these atoms if you drew a displayed formula. For example, consider the simple molecule with the molecular formula CH 2Cl 2. This mismatch between what you draw and what the molecule actually looks like can lead to problems if you aren't careful. Notice that the way the methane is drawn bears no resemblance to the actual shape of the molecule. For example, this is a model of methane together with its displayed formula: You need to remember that each line represents a pair of shared electrons.
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