Lecture 12

Lecture 12 - CHM 11500 Lecture 12 2008 1 3-D Molecular...

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1 CHM 11500 Lecture 12 2008
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2 3-D Molecular Shape and Vision Rhodopsin is responsible for vision. Rhodopsin consists of 11- cis -retinal covalently bonded to a large protein. Note how 11- cis - retinal “fits” into the protein to allow it to bond.
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3 3-D Molecular Shape and Vision When light strikes the molecule, the shape will change via a rotation around the 11-12 bond.
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4 3-D Molecular Shape and Vision When the shape changes, the molecule no longer “fits” with the protein, and they separate. This change in shape and separation from the protein contributes to the electrical signal that travels through your neurons as “vision.”
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5 Models of 3-D Shapes Connectivity between atoms from a molecular formula, C 8 H 10 N 4 O 2 , caffeine. Gives us information about the 3-D shape, and the 3-D shape determines the function (properties) of the molecule.
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6 Lewis structures Lewis structures indicate: the atoms in a molecule or covalent ion how atoms are arranged the location and type of bonds the location of lone pairs
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7 Think/Pair/Share Question #1 How many valence electrons are found in CH 3 Cl ?
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Lecture 12 - CHM 11500 Lecture 12 2008 1 3-D Molecular...

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