Oh snap! Lecture videos might not load due to connection issues to source servers. Sorry for inconvenience.
2217 views

Lec 23 - Valence Theory and Constitutional Structure (1858)

"Lec 23 - Valence Theory and Constitutional Structure (1858)" Freshman Organic Chemistry (CHEM 125) Youthful chemists Couper and Kekulé replaced radical and type theories with a new approach involving atomic valence and molecular structure, and based on the tetravalence and self-linking of carbon. Valence structures offered the first explanation for isomerism, and led to the invention of nomenclature, notation, and molecular models closely related to those in use today. 00:00 - Chapter 1. Archibald Couper: "Look to the Elements" 10:25 - Chapter 2. Tetravalence and Self-Linking of Carbon 19:39 - Chapter 3. Kekule's Advancements in Chemical and Molecular Notation 38:32 - Chapter 4. 3-D Molecular Models: From Brass Strips to Croquet-Balls Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses This course was recorded in Fall 2008.

Video is embedded from external source so download is not available.

Channels: Chemistry (General)

Tags: Isomers Kekulé Couper Molecular Models Nomanclature

Uploaded by: ( Send Message ) on 05-09-2012. Dnatube suggest users to have interest in drug testing, mesothelioma, insurance, medical lawyers.

Duration: 48m 47s

No content is added to this lecture.

Go to course:

This video is a part of a lecture series from of Yale

Lecture list for this course

Lec 1 - How Do You Know?

Lec 2 - Force Laws, Lewis Structures and Resonance

Lec 3 - Double Minima, Earnshaw's Theorem and Plum-Puddings

Lec 4 - Coping with Smallness and Scanning Probe Microscopy

Lec 5 - X-Ray Diffraction

Lec 6 - Seeing Bonds by Electron Difference Density

Lec 7 - Quantum Mechanical Kinetic Energy

Lec 8 - One-Dimensional Wave Functions

Lec 9 - Chladni Figures and One-Electron Atoms

Lec 10 - Reality and the Orbital Approximation

Lec 11 - Orbital Correction and Plum-Pudding Molecules

Lec 12 - Overlap and Atom-Pair Bonds

Lec 13 - Overlap and Energy-Match

Lec 14 - Checking Hybridization Theory with XH_3

Lec 15 - Chemical Reactivity: SOMO, HOMO, and LUMO

Lec 16 - Recognizing Functional Groups

Lec 17 - Reaction Analogies and Carbonyl Reactivity

Lec 18 - Amide, Carboxylic Acid and Alkyl Lithium

Lec 19 - Oxygen and the Chemical Revolution (Beginning to 1789)

Lec 20 - Rise of the Atomic Theory (1790-1805)

Lec 21 - Berzelius to Liebig and Wöhler (1805-1832)

Lec 22 - Radical and Type Theories (1832-1850)

Lec 24 - Determining Chemical Structure by Isomer Counting (1869)

Lec 25 - Models in 3D Space (1869-1877); Optical Isomers

Lec 26 - Van't Hoff's Tetrahedral Carbon and Chirality

Lec 27 - Communicating Molecular Structure in Diagrams and Words

Lec 28 - Stereochemical Nomenclature; Racemization and Resolution

Lec 29 - Preparing Single Enantiomers and the Mechanism of Optical Rotation

Lec 30 - Esomeprazole as an Example of Drug Testing and Usage

Lec 31 - Preparing Single Enantiomers and Conformational Energy

Lec 32 - Stereotopicity and Baeyer Strain Theory

Lec 33 - Conformational Energy and Molecular Mechanics

Lec 34 - Sharpless Oxidation Catalysts and the Conformation of Cycloalkanes

Lec 35 - Understanding Molecular Structure and Energy through Standard Bonds

Lec 36 - Bond Energies, the Boltzmann Factor and Entropy

Lec Last - Potential Energy Surfaces, Transition State Theory and Reaction Mechanism

Dnatube: Sciencific and Medical video site.