W2013CHM2311 Part 4d Notes

C2 c2 h h c h h c2 c2 pz c2 px py mo diagram of

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: a0on axis Step 3: Determine GOs for terminal atoms ⤷  can determine the GOs by imagining the combina0on of two H2 molecules Step 4: Assign symmetry labels using D4h character table. y x Square Planar AH4 D4h E 2 C4 C2 2 C2’ 2 C2” i 2S4 σh 2 σv 2 σd A1g 1 1 1 1 1 1 1 1 1 1 A2g 1 1 1 -1 -1 1 1 1 -1 -1 Rz B1g 1 -1 1 1 -1 1 -1 1 1 -1 x2-y2 B2g 1 -1 1 -1 1 1 -1 1 -1 1 xy Eg 2 0 -2 0 0 2 0 -2 0 0 (xz, yz) A1u 1 1 1 1 1 -1 -1 -1 -1 -1 A2u 1 1 1 -1 -1 -1 -1 -1 1 1 B1u 1 -1 1 1 -1 -1 1 -1 -1 1 B2u 1 -1 1 -1 1 -1 1 -1 1 -1 Eu 2 0 -2 0 0 -2 0 2 0 0 x2+y2, z2 z (x, y) y x A1g Eu B1g Extending to Tetrahedral AH4 These three orbitals have the same shape! Tetrahedral AH4 Td E 8C3 3C2 6S4 6σd A1 1 1 1 1 1 A2 1 1 1 - 1 - 1 E 2 - 1 2 0 0 (2z2- x2- y2, x2- y2) T1 3 0 - 1 1 - 1 (Rx, Ry, Rz) T2 3 0 - 1 - 1 1 (x, y, z) (xy, xz, yz) A AOs: H SALCs: A1 T x2+y2+z2 Tetrahedral AH4 For tetrahedral point groups, combining the GOs with the correct AOs of the central atom may be more clear if they are considered inside a cube and the C2 rota0on axis is considered. C2 C2 H H C H H C2 C2 pz C2 px py MO Diagram of Tetrahedral AH4 C...
View Full Document

Ask a homework question - tutors are online