Chemistry 1301A/B Lecture Notes - Lecture 6: Valence Bond Theory, Sigma Bond, Orbital Hybridisation

• School: Western University
• Department: Chemistry
• Course: Chemistry 1301A/B
• Professor: James Noel

Document Summary

Molecular orbital theory and intermolecular forces, and physical properties (intro) It has electron density above and below the plane of the molecule. Cis/trans isomerism: (cid:862)iso(cid:373)ers(cid:863) are molecules with the same molecular formula, but with different arrangements of atoms (different geometry. , single bonds can rotate, but you cannot rotate around double bonds because they are fixed. This means that we can have cis/trans isomers because they cannot turn: trans = opposite (kitty-corner, cis = on the same side. A triple bond consists of one sigma bond and two pi bonds. *for the exam you should know how to count up the sigma and pi bonds when given a molecule. Boron hydrides (cid:894)*(cid:374)ote that this is i(cid:374)te(cid:396)esti(cid:374)g, (cid:271)ut it (cid:449)o(cid:374)(cid:859)t (cid:271)e tested i(cid:374) this (cid:272)ou(cid:396)se(cid:895: compounds containing b h bonds; called boranes, bh3 is an electron deficient molecule; leads to unusual bonding features. ****** everything after this point is not on the midterm exam.