26. Van't Hoff's Tetrahedral Carbon and Chirality
Ανέβηκε στις 18 Σεπ 2009
Freshman Organic Chemistry (CHEM 125)
With
his tetrahedral carbon models van't Hoff explained the mysteries of
known optical isomers possessing stereogenic centers and predicted the
existence of chiral allenes, a class of molecules that would not be
observed for another sixty-one years. Symmetry operations that involve
inverting an odd number of coordinate axes interconvert mirror-images.
Like printed words, only a small fraction of molecules are achiral.
Verbal and pictorial notation for stereochemistry are discussed.
00:00 - Chapter 1. Interpreting the Rotations of Light for Optically Active Compounds
09:25 - Chapter 2. Van't Hoff's Proof of the Existence of Chiral Allenes
19:57 - Chapter 3. Superimposition, Mirror Images and Handedness: Chirality in Alice's Looking Glass
36:24 - Chapter 4. How Special is Chirality?
41:04 - Chapter 5. Conclusion: Exploring Stereochemistry
Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses
This course was recorded in Fall 2008.
With
his tetrahedral carbon models van't Hoff explained the mysteries of
known optical isomers possessing stereogenic centers and predicted the
existence of chiral allenes, a class of molecules that would not be
observed for another sixty-one years. Symmetry operations that involve
inverting an odd number of coordinate axes interconvert mirror-images.
Like printed words, only a small fraction of molecules are achiral.
Verbal and pictorial notation for stereochemistry are discussed.
00:00 - Chapter 1. Interpreting the Rotations of Light for Optically Active Compounds
09:25 - Chapter 2. Van't Hoff's Proof of the Existence of Chiral Allenes
19:57 - Chapter 3. Superimposition, Mirror Images and Handedness: Chirality in Alice's Looking Glass
36:24 - Chapter 4. How Special is Chirality?
41:04 - Chapter 5. Conclusion: Exploring Stereochemistry
Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses
This course was recorded in Fall 2008.
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