1.4. Determine the number of IR active CO stretching modes for fac-[Mo(CO)=(NCCH3)3]. [HINT: Molecule has a...
How many IR-active CO stretching modes does the molecule Mn(CO)5Cl have? Please explain with figures, calculations or anything needed.
2. Determine the number and type of IR-active C=N stretching vibrations for the following two Mo(CN)74- complexes (10 points): NC ZO NC-ECN zo ZWCA Roz NGON NCS OOZ NC CN
Which vibrational modes will be IR active? Briefly Explain. a. Symmetric N-O stretching (v,N-0) for the nitrate ion, NO,? b. Symmetric C-O stretching (v,C-o) for the carbonate ion, co,'? c. Antisymmetric C-C stretching (VasC-C) for allene: H2CCH2 н.с
Cl 2. (15 points) For the SFsCl molecule: What is the point group? What is the total number of degrees of fredom -b gl 216 What is the total number of vibrational modes?3 What is the reducible representation and what are the irreducible representations of the vibrational modes? Identify which modes are Raman active, IR active, both active or neither. Determine the reducible representation. Then, determine the coefficients of the irreducible representations. Cl 2. (15 points) For the SFsCl molecule:...
Vibrational modes EXERCISE 11.17: Determine the number of IR active vi- brational modes in each of the following molecules. Note: You will have to use symmetry arguments to determine which vibrations result in a net change in the molecular dipole moment. (a) SO, (b) NO (o) NO, (d) so, 2 (e) HCN (f) co (g) H,O (h) CO2 (i) NO
4. One of the isomers of the square planar ion [PtCl2Br2]^2- has only two IR active stretching modes. Identify its point group. In your solution please include a drawing of each isomer and include symmetry elements with the point group. Thank you.
Geometry Point Group Reducible Representation For all atomic motions Vibrational modes Infrared-active modes Raman-active modes Number of IR absorptions Number of Raman emissions square planar
For a molecule to absorb radiation in the IR region of the spectrum, it must undergo a net change in its dipole moment due to its vibration. The vibration is said to be active depending on whether there is a net change in dipole moment and the molecule absorbs IR radiation, or it is said to be inactive if there is no net change in dipole moment and the molecule does not absorb IR radiation. A. State whether the C-C...
3. Consider the trigonal bipyramidal complex Fe(CO)4(PPh3) (Note: PPh3 is triphenylphosphine, P(C6H5)3. For symmetry purposes you can ignore the phenyl groups) a) Draw the two possible isomers for this complex and determine the point group for each. b) Consider IR data for one of the possible structures: Vco = 2052, 1978, and 1945 cm-1. Can this data be used to determine which of the two structures you drew in "a" is the correct structure? Determine the number of IR-active stretching...
For the hypothetical molecule (η4 -C4H4)Mo(CO)4: a. Assuming C4v geometry, predict the number of infrared-active C–O bands. b. Sketch the π molecular orbitals of cyclobutadiene. For each, indicate which s, p, and d orbitals of Mo are of suitable