Mid$term Practice Exam 2
Chem 341: Inorganic Chemistry Name
1) True or False Questions. If the statement is true, then place a T in the answer
column. If the statement is false, then cross out the offending word in the statement and
change it to make the statement true. (5 pts each)
a) A homoleptic octahedral inorganic complex will have at least 21 degrees
of freedom.
c) The A2 vibrational mode for a molecule with C2v symmetry is Raman
forbidden.
d) The dxy and dxz orbital in D2h symmetry transform as different irreducible
representations.
,e) As the symmetry of a molecule decreases, the number of irreducible
representations that are needed to define the d-orbitals increases.
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, Mid$term Practice Exam 2
3) Electronic Structures of Transition Metal Complexes. Answer the following questions and
show all work.
a) You are given a compound with a magnetic moment of 3.7 µB. The transition metal ion
in the compound is unknown, but the ligand is CN– and the counterion is K+. Elemental
analysis is consistent with K3[M(CN)6]. Using the magnetic moment, determine the
identity of the metal ion and give it’s ground term symbol. (15 pts)
b) Which has the larger d-orbital splitting, [Ni(OH 2)6]2+ or [NiCl4]2–? Draw the d- orbital
splitting diagram and label the orbitals using the irreducible representations from the
appropriate character table. (10 pts)
Chem 341: Inorganic Chemistry Name
1) True or False Questions. If the statement is true, then place a T in the answer
column. If the statement is false, then cross out the offending word in the statement and
change it to make the statement true. (5 pts each)
a) A homoleptic octahedral inorganic complex will have at least 21 degrees
of freedom.
c) The A2 vibrational mode for a molecule with C2v symmetry is Raman
forbidden.
d) The dxy and dxz orbital in D2h symmetry transform as different irreducible
representations.
,e) As the symmetry of a molecule decreases, the number of irreducible
representations that are needed to define the d-orbitals increases.
1 of 4 /25
, Mid$term Practice Exam 2
3) Electronic Structures of Transition Metal Complexes. Answer the following questions and
show all work.
a) You are given a compound with a magnetic moment of 3.7 µB. The transition metal ion
in the compound is unknown, but the ligand is CN– and the counterion is K+. Elemental
analysis is consistent with K3[M(CN)6]. Using the magnetic moment, determine the
identity of the metal ion and give it’s ground term symbol. (15 pts)
b) Which has the larger d-orbital splitting, [Ni(OH 2)6]2+ or [NiCl4]2–? Draw the d- orbital
splitting diagram and label the orbitals using the irreducible representations from the
appropriate character table. (10 pts)
