Include pi-bonding in the MO-scheme for O, complexes 1) How many vectors will you use. 2) Work out the reducible representation for the SALCS and attempt to draw the corresponding MO that includes the pi-bonding scheme.

cyclobutadiene is very unsatble, why metal complex are stable? (use mo structure to explain)

State whether Sc is paramagnetic and how you know

1. Using the MO scheme provided below, calculate the bond order for the ligand-metal bonds in a ML6 complex where M=Co2+ and NH3: Recall that independent of the ligand, the eg orbitals that are 10Dq above the t2g orbitals are always o*. M ML6 6L O* 4p d,?.? d,? 2 х - у 4s 3d dy dyz dyz sp3 Op Os

6. Below (top of next page) are shown two possible configurations for a metal center with six cyanide (CN): a trigonal prism (A) and the trigonal anti-prism (B). a. Assign the point groups for A and B assuming the M-C bond distances are the same and that the C-N bond distances are the same. Also, all C-M-C bond angles for nearest neighbor cyanide ligands are 90°. b. Determine the irreducible representations for the C-N stretching vibrations in A and B (you will first need to find the reducible for these modes and then reduce that representation). c. d. Identify the number of IR and Raman active modes for A and B. State and explain whether one can distinguish between the two possible geometries using only IR spectroscopy. N=3 XX N A B