For [Fe2L3](PF6)4, L= C25H20N4
Amax= 0.232 at wavelength 570.6 nm, 17525.41cm-1"
E= 11600 L/mol/cm
Comment on the value of E. Do you think the colour in this complex arises from d-d transitions? Does your answer make sense considering the structure of your ligand?
In the given complex, the iron is present in +2 oxidation state, which gives a d6 configuration and is capable for having d-d transitions. Since d-d transitions are forbidden due to centrosymmetry present in octahedral complexes, these transitions give less color intensities and hence show lower E values.
A= ECL , where A is the absorption , E is molar extinction coefficient, C is the Concentration and L is the length of the sample holder.
Complexes which show higher E values must have high absorption ,here in the given complex the value of E is not due to just d-d transitions but also due the ligand involved. The given ligand is azobenzene which is composed of two phenyl rings interconnected by a N=N bond. It is a π acceptor ligand and will show π-π and π-π* transitions which have high absorption value since they are Laporte allowed and spin allowed as well. Hence the ligand will have a great effect on the E value
For [Fe2L3](PF6)4, L= C25H20N4 Amax= 0.232 at wavelength 570.6 nm, 17525.41cm-1" E= 11600 L/mol/cm Comment on...
The extinction coefficient for FD&C Blue Dye #1 is 138,500 cm-L/mol at 630 nm. A chemist collected the following data at 630 nm. She also found that the absorbance of an FD&C Blue Dye #1 solution of unknown concentration was 0.295. Use your graphing calculator to generate a standard curve from this data set, and use it to determine the concentration of the unknown solution. Express the answer in micromolar (notice micro means 10-6) Concentration of Blue Dye (M) Absorbance...
1. Monochromatic blue light of wavelength 440-nm passes through a 3300 lines/cm diffraction grating and the interference pattern is observed on a screen. (a) Determine the interference angle for the 2nd order bright fringe. (5 points) (b) If a screen is 0.75-m away, how far (in cm) is the 2nd order bright fringe from the center? Show all steps. [3 points) (c) Sketch the path taken by this light to reach the center, the 1st and 2nd order bright fringes....
1. Monochromatic blue light of wavelength 440-nm passes through a 3300 lines/cm diffraction grating and the interference pattern is observed on a screen. (a) Determine the interference angle for the 2nd order bright fringe. 15 points) (b) If a screen is 0.75-m away, how far (in cm) is the 2nd order bright fringe from the center? Show all steps. [3 points) (c) Sketch the path taken by this light to reach the center, the 1st and 2nd order bright fringes....
Just answer part c and d and make sure your answer is properly
readable.
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Percent by mass of dye in Fruit Loops cereal 11.56*100 QUESTIONS: 1. If the molar extinction coefficient (E) of a compound is 2.5 x 108 moli'cmat $28 nm and the Abs Cat 528 nm) 0.254 Dind the concentration of that solution. (assume a path length of 1.0 cm) 2. If a student measures a sample that gives an Abs = 1.85 at the 2max, is this data reliable? If not, then what might they do to improve their data? 3....
I need help with Part A through Part E. The help is
greatly appreciated!
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