CHEM 110 Lecture Notes - Lecture 8: Trigonal Planar Molecular Geometry, Trigonal Pyramidal Molecular Geometry, Trigonal Bipyramidal Molecular Geometry

• School: NIU
• Department: Chemistry and Biochemistry
• Course: CHEM 110
• Professor: Megan Leifker

Document Summary

Basic electron pair repulsion of a full octet. There are 4 bonded atoms around the central carbon. Minimal electron repulsion when electrons are placed at the four corners of a tetrahedron. Tetrahedron is the primary structure of a full octet. There are three bonded atoms and one lone pair (four groups) A lone pair is more electronegative with a greater electron repulsion. The lone pair takes one of the tetrahedron without being visible, distorting the arrangement of electron pairs. Ammonia has a trigonal bipyramidal structure with 107o angles. Basic electron pair repulsion of a full octet with one lone pair. There are two bonded atoms and two lone pair (four groups) All 4 electron pairs are approximately tetrahedral to each other. The lone pairs take two of the corners of the tetrahedron without being visible, distorting the arrangement of electron pairs. Water has a bent or angular structure with 104. 5o bond angle.