CHEM 001B Lecture Notes - Lecture 2: Trigonal Pyramidal Molecular Geometry, Trigonal Bipyramidal Molecular Geometry, Trigonal Planar Molecular Geometry

• School: UC Riverside
• Department: Chemistry
• Course: CHEM 001B
• Professor: Quan Cheng

Document Summary

Clicker quiz #1: x (i put c instead of b ) Practice the molecular geometry of: h2co, ch4. Sn= 4: tetrahedral electron pair geometry, trigonal pyramidal molecular geometry. Sn = 5 (1 lone pair) trigonal bipyramidal electron-pair geometry: seesaw molecular geometry, t-shaped molecular (2 lone pair) trigonal bipyramidal electron-pair geometry. Sn = 6 (1 lone pair) octahedral electron-pair geometry: square pyramidal molecular geometry, square planar molecular geometry (2 lone pairs) octahedral electron-pair geometry. A more challenging question: geometry of the following ions: bro3, bro2. Polar bonds and polar molecules: requirements for polar molecule, polar (cid:271)o(cid:374)ds (cid:894)i. e. (cid:272)o(cid:448)ale(cid:374)t (cid:271)o(cid:374)d (cid:271)et(cid:449)ee(cid:374) ato(cid:373)s en(cid:895, non-uniform distribution of polar bonds. Polar molecules: bond dipole, separation of electrical charge created when atoms wither different en form a covalent bond, polar molecule, vectors of bond dipoles whose sum > zero. Dipole moment ( ) a quantitative expression of the polarity of a molecule.