Coordination CompoundHard
Question
A chemist wants to determine the molecular geometry of the [CoCl4]2- ion. Which of the following gives the best suggestion for a measurement and for the interetation of that measurement ?
Options
A.Using absorption spectroscopy, measure φmax then calculate ᐃ0 for octhedral geometry
B.Measure the molecule′s magnetic moment and use the result to estimate the number of unpaired spins in the molecule. If this number is low, the geometry is likely to be sqare planar; otherwise, it is likely to be tetrahedral
C.Measure the molecule′s magnmate momentand use the result to estimate the number ofupaiered spins in the molcule. If this number is low the geometry is likely to be tetrahedral; otherwise, it is likely to be aquareplannar
D.Measure the molecule′s magnetic moment and use the result to estimate the number of upaired spins in the molecule. If this number is low, the geometry, is likely to the be tetrahral; it is likely to be octahedral
Solution
In the complexes of C.N.4, square plannar geometry gives rise to low spin (spinpaired)configurations whereas tetrahedral comlexxes display high spin cinfigurations.
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