Chapter 19: Q60E (page 814)
The complex ion is paramagnetic with unpaired electron. The complex ion has five unpaired electrons. Where does SCN lie in spectrochemical series with respect torole="math" localid="1663874323843" .
The thiocyanate comes after cyanate ligand in the spectrochemical series
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Carbon monoxide is toxic because it binds more strongly to iron in hemoglobin (Hb) than does . Consider the following reactions and approximate standard free energy changes:
Using these data, estimate the equilibrium constant value at 258C for the following reaction:
Name the following coordination compounds.
There are three salts that contain octahedral complex ions of chromium ions and have the molecular formula . Treating 0.27 g of the first salt with a strong dehydrating agent resulted in a mass loss of 0.036 g. Treating 270 mg of the second salt with the same dehydrating agent resulted in a mass loss of 18 mg. The third salt did not lose any mass when treated with same dehydrating agent. Addition of excess aqueous silver nitrate to 100.0-mL portions of 0.100 M solutions of each salt resulted in the formation of different masses of silver chloride; one solution yielded 1430 mg ; another, 2870 mg ; the third, 4300 mg . Two of the salts are green and one is violet. Suggest structural formulas for these salts, defending your answer on the basis of the preceding observations. State which salt is most likely to be violet.
A coordination compound of cobalt(III) contains four ammonia molecules, one sulfate ion, and one chloride ion. Addition of aqueous solution to an aqueous solution of the compound gives no precipitate. The addition of aqueous to an aqueous solution of the compound produces a white precipitate. Propose a structure for this coordination compound.
A compound related to acetylacetone is 1,1,1- trifluroacetylacetone (abbreviated Htfa):
Htfa forms complexes in a manner similar to acetylacetone. (See Exercise 43.) Both Be2+ and Cu2+ form complexes with tfa having the formula M(tfa)2. Two isomers are formed for each metal complex.
a. The Be2+ complexes are tetrahedral. Draw the two isomers of Be(tfa)2. What type of isomerism is exhibited by Be(tfa)2?
b. The Cu2+ complexes are square planar. Draw the two isomers of Cu(tfa)2 What type of isomerism is exhibited by Cu(tfa)2?
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