Discovering chemistry by The Open University

Author:The Open University
Language: eng
Format: azw3, pdf
Publisher: The Open University
Published: 2018-02-28T16:00:00+00:00

Figure 1 Lewis structures (bottom) and structural formulas (top) for CO2 and N2

In carbon dioxide, the two electron pairs between each oxygen atom and the central carbon atom represent each carbon-oxygen double bond.

Turning now to the Lewis structure of the nitrogen molecule, the three shared pairs in the nitrogen molecule are equivalent to a triple bond.

As an aside, it is worth adding that nitrogen, N2, is chemically very unreactive, in fact almost as inert as the noble gases. This stems from the great strength of this triple bond. Indeed, gaseous nitrogen finds applications where inert atmospheres are required, including manufacture of air-sensitive chemicals, and in the liquid form when extreme cold is essential (Figure 2), such as the preservation of blood and semen, and rapid freezing of food.

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