PPT-Non-Covalent Interactions

Alexandra Kent amp Allyson Brome University of Utah Non Covalent Interactions Wiki Page http enwikipediaorgwikiNon covalentinteractions Other References Anslyn E V Dougherty D A 2006 Modern Physical Organic Chemistry Sausalito CA University Science. Ch. . 16. Covalent Compounds. Covalent bonds. form when atoms share . their valence electrons. .. Covalent compounds. are formed from 2 or more nonmetals.. Rules for Naming Covalent Compounds. 1. Prefixes are used to show how many atoms of each element are present in the compound . Why do atoms bond?. Atoms gain stability when they share electrons and form covalent bonds.. Lower energy states make an atom more stable.. Gaining or losing electrons makes atoms more stable by forming ions with noble-gas electron configurations.. 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. 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 . Valence Electrons and Bonding. The number of valence electrons (electrons in the outermost energy level) in an atom of an element determines many properties of that element, including the ways in which the atom can bond with other atoms.. . 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 .  . 1) . SeF. 6. . . ________________________________________.  . 2) . TeO. 3 . . ________________________________________.  . 3) . H. 2. O. . . ________________________________________.  . 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.. Covalent bonding. Ionic bonding. Ionic Bonding. Bonding as you’ve never imagined it. http://www.youtube.com/watch?v=BCYrNU-7SfA. Objectives. To consider the features of ionic and covalent bonds, and the compounds they make. What do these images have in common?. How are they different?. What do you know about the uses of graphite and carbon?. Learning questions. What are giant covalent molecules?. How are they similar/ different from each other?. By: Andres F Sanchez. Molecular Orbital!. Molecular Orbital- . The space that shared electrons move in. Covalent Bond- . when two atoms share electrons. Energy and Stability. Most atoms have low stability except noble gases. Covalent bonds . result from the . sharing . of electrons. between two atoms.. A covalent bond is a . two-electron bond . in which the bonding atoms share valence electrons.. A . molecule . is a discrete group of atoms held together by covalent bonds.. Ionic bonds form a . giant lattice structure. Sodium chloride is an ionic compound formed by the reaction between the metal sodium and the non-metal chlorine.. During the reaction, one electron is transferred from each sodium atom to each chlorine atom.. Elizabeth Bess. University of Utah. Non-covalent interactions with Pi systems. Overview: . Non-covalent interactions are the underpinnings of chemical selectivity, molecular recognition, and supramolecular molecules’ tertiary structure (e.g., enzymes and DNA). These through-space, rather than through-bond, interactions arise from attractions between oppositely and fully or partially charged species. One such class of non-covalent interactions are the intermolecular interactions of pi systems with other pi systems or charged species. .