![]() Richard Smalley, a professor of physics, chemistry, and astronomy at Rice University, was one of the leading advocates for fullerene chemistry. They also possess unique electronic and optical properties that have been put to good use in solar powered devices and chemical sensors. Because of their size and shape, fullerenes can encapsulate other molecules, so they have shown potential in various applications from hydrogen storage to targeted drug delivery systems. This type of molecule, called a fullerene, shows promise in a variety of applications. An entire class of compounds, including spheres and tubes of various shapes, were discovered based on C 60. ![]() In 1996, the Nobel Prize in Chemistry was awarded to Richard Smalley (Figure 3), Robert Curl, and Harold Kroto for their work in discovering a new form of carbon, the C 60 buckminsterfullerene molecule. ![]() (credit: United States Department of Energy)Ĭarbon soot has been known to man since prehistoric times, but it was not until fairly recently that the molecular structure of the main component of soot was discovered. What are the Lewis structures of these two molecules?įigure 3. Both of these gases also cause problems: CO is toxic and CO 2 has been implicated in global climate change. NH 3: all atoms have the correct number of electronsīoth carbon monoxide, CO, and carbon dioxide, CO 2, are products of the combustion of fossil fuels. HCCH: form a triple bond between the two carbon atoms H 3CCH 3: all atoms have the correct number of electrons Step 5: Where needed, rearrange electrons to form multiple bonds in order to obtain an octet on each atom: Step 4: Where needed, place remaining electrons on the central atom: NH 3: no terminal atoms capable of accepting electrons ![]() HCCH: no terminal atoms capable of accepting electrons Step 3: Where needed, distribute electrons to the terminal atoms: Draw a skeleton and connect the atoms with single bonds. Step 1: Calculate the number of valence electrons. Let us determine the Lewis structures of \text_(2), each atom has an octet as drawn, so nothing changes.
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