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- Determine the symmetry point groups of the mer- and fac- isomers of the complex [Re(CO)3(NCMe)3] and deduce the irreducible symmetry representations generated by the three stretching vibrations of the C triple bond to N ligands in each of the isomers. [Regard NCMe as a linear ligand.] Also for each isomer discussed, state with reasoning which vibrations are IR active, and which are Raman active and how many bands will be observable in IR and Raman spectra. How can you distinguish the two isomers using their vibrational spectra?What point group is produced if an octahedral (Oh) complex is distorted by stretching two trans M-L bonds and compressing another two trans bonds? D4h D2d D2h C4vBy using the given 1) electronic absorption spectrum, 2) the Tanabo-Sugano diagram for d3 complex in octahedral ligand field and 3) the absorption/emission spectra, explain the following: a) Ligand field states (to support your explanation show the filling of the orbitals) b) Radiative transitions (to support your explanation refer to fluorescence, phosphorescence and Stokes’ shift)
- Find the point groups of all the possible geometrical isomers for the complex MA2B2C2 in which there is ‘octahedral’ coordination around the central atom M and where the ligands A, B, and C are treated as structureless points. Which of the isomers are chiral?What is the point group and polarity of perbromobenzene?Draw the full molecular orbital diagram for [Fe(H2O )6] +2. Each MO must have a drawing of the interaction and the appropriate Mulliken symbol. Approximate ligands down to their lone pairs, and derive the point group from only the geometry created by those donating atoms..
- Can you tell me the point group of the following Complex.What are the point groups of a tetragonally compressed tetrahedral and square planar geometry of this complex?Use resonance forms to show that the dipolar sigma complex shown in the sulfonationof benzene has its positive charge delocalized over three carbon atoms and its negativecharge delocalized over three oxygen atoms.
- Consider the octahedral complex [FeBr6] 4−. In water solution it has an absorption peak at 864 nm with a molar absorptivity (ε) of 3.6 L mol-1 cm-1 . (a) What is the energy (in wavenumbers, cm-1 ) of the absorption peak? Show all workDetermine the symmetry representations of CO stretching vibrations of a Mn(CO)5Br complex, which has a pseudo-octahedral structure with CO ligands at five corners and a Br ligand at the sixth corner. Which of the CO stretching vibrations are active in IR absorption and which in Raman spectra? can you show graphicallyCalculate ∆ in kJ/mol if a d1 complex has an absorption maximum at 545 nm.