PPT-Non-Covalent Pi-System Interactions

Elizabeth Bess University of Utah Noncovalent interactions with Pi systems Overview Noncovalent interactions are the underpinnings of chemical selectivity molecular recognition and supramolecular molecules tertiary structure eg enzymes and DNA These throughspace rather than throughbond interactions arise from attractions between oppositely and fully or partially charged species One such class of noncovalent interactions are the intermolecular interactions of pi systems with other pi systems or charged species . What is the arrangement of the electrons around each chlorine atom in Cl. 2. ?. 2, 8, 8. This is the same as the electron configuration of an atom of which noble gas?. Argon. When atoms bond . covalently. Chapter 9 ~ most compounds, including those in living organisms, are covalently bonded. What You’ll Learn. I will analyze the nature of a covalent bond. I will name covalently bonded groups of atoms. Including Naming. Note: We likely won’t make it to covalent nomenclature, this is the one students find FAR easier than ionic. Please refer to the videos and naming hand out for help with this, and as always office hours, discussions, and . . and Structure. IB Chemistry. Topic 4. . Bond - A force that holds . atoms . together and . makes . them . function as a . unit.. 4.1 Ionic Bonding. An . ion. is a charged particle. Ions form from atoms or from groups of atoms by . Ball-and-stick model. Molecular . Compounds. OBJECTIVES:. Distinguish. between the melting points and boiling points of . molecular. compounds and . ionic. compounds.. Molecular . Compounds. OBJECTIVES:. Transferases and hydrolases catalyze group transfer reactions. Acyl transfer:. Hexo. kinase. catalyzes a phosphoryl transfer from ATP to glucose. Glycosidases. are hydrolases, catalyzing hydrolysis of . Bonding. Bonding models for methane, CH. 4. . Models are NOT reality. Each has its own strengths and limitations.. Ga . Standards. Students know . atoms combine to form molecules by sharing electrons to form covalent or metallic bonds or by exchanging electrons to form ionic bonds.. Alexandra Kent & Allyson Brome. University of Utah. Non Covalent Interactions. Wiki Page. : . http. ://en.wikipedia.org/wiki/Non-. covalent_interactions. . Other References: . Anslyn. , E. V., Dougherty, D. A. (2006). Modern Physical Organic Chemistry. Sausalito, CA. University Science.. Types of bonds. Ionic bonding. results from electrostatic attractions among ions, which are formed by the . transfer. of one or more electrons from one atom to another.. Covalent bonding. results from . Ionic bonds . result when electrons are transferred between atoms. Covalent bonds . result when valence electrons are shared between atoms. Types of Bonds. Formed between a . metal. and a . non-metal. Transferases and hydrolases catalyze group transfer reactions. Acyl transfer:. Hexo. kinase. catalyzes a phosphoryl transfer from ATP to glucose. Glycosidases. are hydrolases, catalyzing hydrolysis of . Mrs. Page. Essential Idea. Lewis (electron dot) structures show the electron domains in the valence shell and are used to predict molecular shape. .. Nature of Science. Scientists . use models as representatives of the real world – the development of the model of molecular shapes (VSEPR) to explain observable properties.. Covalent Bonds. Covalent bonds:. occur between two or more . nonmetals. ; electrons are . shared. not transferred (as in ionic bonds). The result of sharing electrons is that atoms attain a more stable electron configuration.. Paul Deitel, CEO. Deitel & Associates, Inc.. Contact Information. Paul Deitel, CEO. Deitel & Associates, Inc.. Twitter: @deitel/@. pdeitel. Facebook. : . http://tinyurl.com/deitelfacebook. deitel@deitel.com.