|
 |
Chemistry Seminar Program
Distinguished Women in Science Seminar
Thursday, October 19th and
Friday, October 20th
Professor Cheryl Stevenson
"The Second Annulyne "
| 4:15 - 5:15 pm |
9:00 - 10:45 am |
| Thursday, Oct 19th |
Friday, Oct 20th |
| Braun Lecture Hall |
Chem Gazebo |
This seminar is free and open to the public. All Stanford University Chemistry students are encouraged to attend this special event.
About the seminar
For over 100 years [6]Annulyne (o-benzyne, ) has represented the only commonly used annulyne. It is used as a reactive intermediate for the synthesis of a wide variety of materials. The next annulyne, [8]Annulyne, was discovered much more recently, and it has been found to undergo a number of reactions that are analogous to those of [6]annulyne (e.g. it dimerizes and trimerizes), and it undergoes a variety of reactions that are quite different from those of benzyne. The new ‘world’ of [8]annulyne and its reaction products is just beginning to opening up and reveal a number of new unstable substances. Some of these new compounds required the ‘intelligent design’ of new vocabulary, e.g. annulenylene, cyclopropannulene, etc. Further, since [8]annulyne represents a dehydrogenated non-aromatic annulene, its reductive chemistry is quite different from that of benzyne. It, and some of its unstable reaction products, can be ‘tamed’ for prolonged observation via electron addition. The next (in terms of size) non-aromatic annulyne, [12]annulyne, has also been recently observed in our laboratory. It appears in several flavors as does its hydrogenated ‘progenitor,’ [12]annulene. There is more to annulenylenes, annulynes, and annulenacenes than doesn’t meet the eye.
About Stevenson:
Cheryl Stevenson graduated with a B.S.in Chemistry from San Jose State University
and earned her Ph.D. in Physical Chemistry from Texas A&M University. Her
Post-doctoral work was at The University of Texas and Iowa State University. Stevenson has spent the
last 30 years at Illinois State University were she became a Distinguished Professor in 1987.
Stevenson received the 2007 ACS National Award for Research at an Undergraduate Institution
Questions
Please contact Patricia Dwyer at 650-723-4770.
|
