CHM 2210 Chapter Notes - Chapter 1: Fluorine, Phenol, Steric Effects

• School: University of Florida
• Department: Chemistry
• Course: CHM 2210
• Professor: port

Document Summary

Place numbers on the substituent going away from the parent chain on the longest straight chain. Group below is called a (2-methylbutyl) i) ii) iii) iv) For every valence electron, a dot is placed around the atom. Boron has three valence electrons, so it can make only three bonds. A bond is considered the sharing of two electrons between two adjacent nuclei. Ligand bond = lewis acid-base bond i. http://www. youtube. com/watch?feature=player_detailpage&v=eufpzfawwco iii) iv) v) vi) vii) viii) In most cases, with the exception of ligand bonds, one electron from each atom goes into forming the bond. Difference in electronegativity between two atoms <1. 5, covalent. Difference in electronegativity between two atoms <2. 0, ionic. Difference in electronegativity between two atoms >1. 5 and <2. 0, polar-covalent. Two types of covalent bonds, sigma and pi. Sigma bonds have electron density shared between the two nuclei. Pi bonds have no electron density shared between the two nuclei, just above and below.