30 Questions
What is the most stable geometry for a coordination number of 6?
Octahedral
In which geometry are intra-ligand sulfur-sulfur interactions mentioned to stabilize the structure?
Trigonal prism
Which type of ligands can stabilize the trigonal prismatic geometry?
Dithiolate ligands
Why is the trigonal prism considered unstable compared to the octahedral geometry?
Lower energy in D3h configuration
Which coordination number is not common in transition metal complexes?
7
Which type of hepta complex does not show a clear structural preference according to the text?
[M(CN)7]n-
What is the typical pyramidalization value (θ) for d6 (LS) complexes with spy geometry?
90°
In d6 (HS) complexes, what does pyramidalization typically result in?
Planar geometry
For ML5 complexes with 5 ligands being the same, what type of geometry may be observed?
TBP or SPY
In [Cu(AA)2L] complexes, where AA = bpy or phen, the choice of ligand L determines which geometrical arrangement?
SPY
What is the preferred geometry for CN=5 [M(tridentate)L2] complexes based on flexible aliphatic chains?
SPY
How do methyl substituents affect the geometry of CN=5 [M(tetradentate)L] complexes?
Force L out of plane to create distorted TBP geometry
Which group of complexes typically exhibit trigonal planar geometry for coordination number 3?
Group 12: HgI3-
Which factor primarily determines the geometry of [Au(CH3)3]?
Molecular orbital calculations
For complexes with coordination number 4, which geometry is favored for low spin d8 configurations?
Square planar
Which factor primarily determines the geometry of complexes with monodentate ligands for configurations d0-d2, d5-d7 (high spin), and d10?
Electrostatic considerations
Which statement is true for complexes with coordination number 4?
Square planar geometry is favored for low spin complexes due to electronic stability.
Which factor primarily determines the geometry of complexes with bulky amide ligands [M(NR2)3] or [M(NR2)L2], where R = SiMe3?
Steric effects of the ligands
Which of the following configurations is most favored for square planar complexes?
d8
Which of the following statements about tetrahedral complexes is correct?
They are favored for small metal ions and large ligands.
Which of the following statements about square planar complexes with d10 configuration is correct?
They are highly favored due to the pseudo-noble gas configuration.
Which of the following is true for meridional and facial tridentate ligands?
Meridional ligands do not favor tetrahedral geometries without distortion.
Which of the following statements about the geometry of complexes with polydentate ligands is correct?
The geometry depends on the nature of the ligands.
Which of the following statements about tetrahedral complexes of Co(II) is correct?
Co(II) has no electronic difference between tetrahedral and square planar geometries.
Which coordination number is rare and has a missing vertex from the ideal icosahedral geometry?
11
Which of the following compounds exhibit the most stable icosahedral geometry for coordination number 12?
[M(A-A)6], where A-A = NO3
Which electronic factor can cause distortion in coordination compounds?
Jahn-Teller effect
Which of the following complexes typically exhibit first-order Jahn-Teller distortion with elongation?
Cu2+ (d9) complexes
Which of the following is required for a second-order Jahn-Teller effect to occur?
Non-degenerate ground state
In which geometry does the second-order Jahn-Teller effect cause a distortion towards a square pyramidal structure?
Trigonal bipyramidal
Test your knowledge on transition metal complexes with different ligands and coordination geometries. Includes examples of amide complexes, organometallic compounds, and rare earth metal complexes. Explore stereochemistry variations and exceptions related to trigonal planar structures.
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