CHEM 001B- Final Exam Guide - Comprehensive Notes for the exam ( 30 pages long!)
29 Mar 2018
School
Department
Course
Professor
Document Summary
Biological activity and molecular shape: chemical/physical properties are related to molecular shape, molecules have three-dimensional structure which determines their activity. Just like how your right hand and left hand are mirrored. Ex: alanine (s) one of the 20 amino acids that is incorporated into proteins, Alanine (r) only found in some bacterial cell walls. Molecular shape: lewis structures, show atoms and bonds, but not spatial orientations (3d, molecular models, show orientations and bond angles, help us understand physicochemical properties. Bond angle: angle (in degrees) defined by lines joining the centers of two atoms to the center of a third atom to which they are covalently bonded. Vsepr theory: a model predicting that the argument of valence electron pairs around the central atom minimizes repulsion to produce the lowest-energy orientation. Electron-pair geometry: the three-dimensional arrangement of bonding electron pairs and lone pairs elections around a central atom. Molecular geometry: the three-dimensional arrangement of atoms in a molecule.
