CHEM 301 Lecture Notes - Lecture 4: Tetrahedron, Trigonal Planar Molecular Geometry, Antibonding Molecular Orbital
Document Summary
Condensed structural formulas: co(cid:374)de(cid:374)sed stru(cid:272)tural for(cid:373)ulas sho(cid:449) stru(cid:272)tural (cid:858)groupi(cid:374)gs(cid:859) (cid:449)ithout sho(cid:449)i(cid:374)g all the individual bonds, atoms bonded to central atoms are listed after the central atom. If two or more identical groups, parentheses and a subscript may be used to represent them. Wave properties of electrons: standing wave vibrates in fixed location, wavelength=n,l,ml: mathematical description of energy, size, shape, and orientation of the orbitals, node- where amplitude =0. If waves interact constructively, resulting orbital is lower in energy than the original atomic orbitals; a bonding molecular orbital results. If waves interact destructively, resulting orbital is higher in energy: an antibonding molecular orbital results. Bonding mo: head-to-head o(cid:448)eerlap of ao(cid:859)s results i(cid:374) high ele(cid:272)tro(cid:374) de(cid:374)sit(cid:455) (cid:271)e(cid:449)t(cid:449)ee(cid:374) (cid:374)u(cid:272)lei bonds, may be formed by s-s, p-p, s-p, or hybridized orbital overlapped, centered along intermolecular axis. * antibonding mo: bonding mo is lower in energy than original atomic/hybrid orbitals, antibonding mo is higher in energy than either of the atomic/hybrid orbitals or .
