Factory made hot-sale Diethyl L(+)-Tartrate for Sao Paulo Manufacturer
CAS NO.：87-91-2 Name：D(-)-Tartaric Acid Function：
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An acetate is a salt formed by the combination of acetic acid with an alkaline, earthy, or metallic base. “Acetate” also describes the conjugate base or ion (specifically, the negatively charged ion called an anion) typically found in aqueous solution and written with the chemical formula C2H3O2−. The neutral molecules formed by the combination of the acetate ion and a positive ion (called a cation) are also commonly called “acetates” (hence, acetate of lead, acetate of aluminum, etc.). The simplest of these is hydrogen acetate (called acetic acid) with corresponding salts, esters, and the polyatomic anion CH3CO2−, or CH3COO−.
Most of the approximately 5 billion kilograms of acetic acid produced annually in industry is used in the production of acetates, which usually take the form of polymers. In nature, acetate is the most common building block for biosynthesis. For example, the fatty acids are produced by connecting the two carbon atoms from acetate to a growing fatty acid.
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Freshman Organic Chemistry (CHEM 125)
Within a lecture on biological resolution, the synthesis of single enantiomers, and the naming and 3D visualization of omeprazole, Professor Laurence Barron of the University of Glasgow delivers a guest lecture on the subject of how chiral molecules rotate polarized light. Mixing wave functions by coordinated application of light’s perpendicular electric and magnetic fields shifts electrons along a helix that can be right- or left-handed, but so many mixings are involved, and their magnitudes are so subtle, that predicting net optical rotation in practical cases is rarely simple.
00:00 – Chapter 1. Introduction: Challenges in Isolating Enantiomers Despite Optical Activity
06:09 – Chapter 2. Barron: A Sketch of Lord Kelvin and Chirality
12:35 – Chapter 3. Natural and Magnetic Optical Rotation
20:49 – Chapter 4. Understanding Optical Activity via the Carbonyl Chromophore
37:22 – Chapter 5. Who Cares? Chiral Switches in Life and Drugs
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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