PPT-Organometallic

Reagents CarbonMetal Bonds R X R M Nucleophilic carbon Organometallic Reagents same for Ar X is an oxidationreduction reaction carbon is reduced . 423/523 Problem set 3 1. Rationalise the following observations: (a) On going from Fe(CO) 5 to Fe(CO) 3 (PPh 3 ) 2 , absorptions in the IR spectrum at 2025 and 2000 cm - 1 are replaced by bands Chemistry. 2. Catalysis. Organometallic. Chemistry. . The Players. Introducing Wilkinson’s Catalyst, RhCl(PPh. 3. ). 3. Organometallic. Chemistry. . The Players. Understanding. Wilkinson’s Catalyst, RhCl(PPh. C344. Overview. Asymmetric catalysis. Lab overview. Organometallic reactions. Chiral GC analysis. Optical Activity. Asymmetric Catalysis. Asymmetric Synthesis. Stereoselectivity. . Diastereomeric. excess. 8-7. If the carbonyl carbon of an aldehyde or ketone could be attacked by a nucleophilic carbon atom, R:. -. , instead of a hydride ion, both an alcohol and a new carbon-carbon bond would be formed.. Compounds. B.Sc. III. Organic Chemistry. Organometallic Compounds. Organometallic. compound:. a compound that contains a carbon-metal bond. In this chapter, we focus on . organometallic. compounds of Mg, Li, and Zn. Chemistry Department, College of Science, King Saud University. http://fac.ksu.edu.sa/melnewehy. Organic Halogen Compounds. Classes and Nomenclature of Halogen Compounds. - Alkyl halides. , . R-X.. - Depending on the type of carbon to which the halogen is attached, . Reactions and Catalysis. Ligand loss or gain. Dissociation/Substitution. Oxidative addition. Reductive elimination. Nucleophilic displacement. Ligand modification. Insertion. Carbonyl insertion (methyl migration). hemistry. . VSEPR Theory:. . According . to the valence shell electron pair repulsion theory (VSEPR theory), the geometry of a covalent compound depends upon the number and arrangement in the space of electron pairs present in the valence shell of the central atom. This number is half of the summation of electrons present in the valence shell of the central atom and the electrons contributed by the combining atoms. Thus in the case of H. Nature of coordinative bond. Back-bonding. Bonding of metals to . p. -systems. Valence bond and hybridization. Each bond treated independently from the environment. Resonance concept. Impossibility to explain molecular geometries.