Chromium is an interesting transition metal that is important in metallurgy and is also found in many oxidation states in many different types of coordination compounds. Consider the coordination compound Rb2[Cr(O)Cls] (one oxide ligand and five chloride ligands). a. Determine the oxidation state and d-configuration for the chromium atom. HINT: Use the periodic table to deduce the charge of an oxide ligand. b. State the coordination number for this coordination compound and the expected geometry. Are there any isomers expected for this compound? If there are, draw structures of the isomers. C.

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Chapter21: Transition Metals And Coordination Chemistry
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Answer question 1; parts a,b,c,d
Chromium is an interesting transition metal that is important in metallurgy and is
also found in many oxidation states in many different types of coordination compounds.
Consider the coordination compound Rb2[Cr(O)Cls] (one oxide ligand and five chloride
ligands).
a. Determine the oxidation state and d-configuration for the chromium atom. HINT: Use
the periodic table to deduce the charge of an oxide ligand.
b. State the coordination number for this coordination compound and the expected
geometry.
Are there any isomers expected for this compound? If there are, draw structures of the
isomers.
C.
d. Rb2[Cr(O)Cls] is observed to be reddish purple in color and have a wavelength of
maximum absorbance at 588 nm. If it were possible to make Rb2[Cr(O)(NH:)s], would
you expect the wavelength of maximum absorbance to shift to longer or shorter
wayelengths? Explain your answer.
Transcribed Image Text:Chromium is an interesting transition metal that is important in metallurgy and is also found in many oxidation states in many different types of coordination compounds. Consider the coordination compound Rb2[Cr(O)Cls] (one oxide ligand and five chloride ligands). a. Determine the oxidation state and d-configuration for the chromium atom. HINT: Use the periodic table to deduce the charge of an oxide ligand. b. State the coordination number for this coordination compound and the expected geometry. Are there any isomers expected for this compound? If there are, draw structures of the isomers. C. d. Rb2[Cr(O)Cls] is observed to be reddish purple in color and have a wavelength of maximum absorbance at 588 nm. If it were possible to make Rb2[Cr(O)(NH:)s], would you expect the wavelength of maximum absorbance to shift to longer or shorter wayelengths? Explain your answer.
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