Transition Metal Chemistry Complexes Quiz
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Questions and Answers

What is the most stable geometry for a coordination number of 6?

  • Trigonal prism
  • Pentagonal bipyramid
  • Octahedral (correct)
  • Trigonal prismatic
  • In which geometry are intra-ligand sulfur-sulfur interactions mentioned to stabilize the structure?

  • Trigonal prism (correct)
  • Pentagonal bipyramid
  • Capped trigonal prism
  • Octahedral
  • Which type of ligands can stabilize the trigonal prismatic geometry?

  • Monodentate ligands
  • Dithiolate ligands (correct)
  • Bidentate ligands
  • π donor ligands
  • Why is the trigonal prism considered unstable compared to the octahedral geometry?

    <p>Lower energy in D3h configuration</p> Signup and view all the answers

    Which coordination number is not common in transition metal complexes?

    <p>7</p> Signup and view all the answers

    Which type of hepta complex does not show a clear structural preference according to the text?

    <p>[M(CN)7]n-</p> Signup and view all the answers

    What is the typical pyramidalization value (θ) for d6 (LS) complexes with spy geometry?

    <p>90°</p> Signup and view all the answers

    In d6 (HS) complexes, what does pyramidalization typically result in?

    <p>Planar geometry</p> Signup and view all the answers

    For ML5 complexes with 5 ligands being the same, what type of geometry may be observed?

    <p>TBP or SPY</p> Signup and view all the answers

    In [Cu(AA)2L] complexes, where AA = bpy or phen, the choice of ligand L determines which geometrical arrangement?

    <p>SPY</p> Signup and view all the answers

    What is the preferred geometry for CN=5 [M(tridentate)L2] complexes based on flexible aliphatic chains?

    <p>SPY</p> Signup and view all the answers

    How do methyl substituents affect the geometry of CN=5 [M(tetradentate)L] complexes?

    <p>Force L out of plane to create distorted TBP geometry</p> Signup and view all the answers

    Which group of complexes typically exhibit trigonal planar geometry for coordination number 3?

    <p>Group 12: HgI3-</p> Signup and view all the answers

    Which factor primarily determines the geometry of [Au(CH3)3]?

    <p>Molecular orbital calculations</p> Signup and view all the answers

    For complexes with coordination number 4, which geometry is favored for low spin d8 configurations?

    <p>Square planar</p> Signup and view all the answers

    Which factor primarily determines the geometry of complexes with monodentate ligands for configurations d0-d2, d5-d7 (high spin), and d10?

    <p>Electrostatic considerations</p> Signup and view all the answers

    Which statement is true for complexes with coordination number 4?

    <p>Square planar geometry is favored for low spin complexes due to electronic stability.</p> Signup and view all the answers

    Which factor primarily determines the geometry of complexes with bulky amide ligands [M(NR2)3] or [M(NR2)L2], where R = SiMe3?

    <p>Steric effects of the ligands</p> Signup and view all the answers

    Which of the following configurations is most favored for square planar complexes?

    <p>d8</p> Signup and view all the answers

    Which of the following statements about tetrahedral complexes is correct?

    <p>They are favored for small metal ions and large ligands.</p> Signup and view all the answers

    Which of the following statements about square planar complexes with d10 configuration is correct?

    <p>They are highly favored due to the pseudo-noble gas configuration.</p> Signup and view all the answers

    Which of the following is true for meridional and facial tridentate ligands?

    <p>Meridional ligands do not favor tetrahedral geometries without distortion.</p> Signup and view all the answers

    Which of the following statements about the geometry of complexes with polydentate ligands is correct?

    <p>The geometry depends on the nature of the ligands.</p> Signup and view all the answers

    Which of the following statements about tetrahedral complexes of Co(II) is correct?

    <p>Co(II) has no electronic difference between tetrahedral and square planar geometries.</p> Signup and view all the answers

    Which coordination number is rare and has a missing vertex from the ideal icosahedral geometry?

    <p>11</p> Signup and view all the answers

    Which of the following compounds exhibit the most stable icosahedral geometry for coordination number 12?

    <p>[M(A-A)6], where A-A = NO3</p> Signup and view all the answers

    Which electronic factor can cause distortion in coordination compounds?

    <p>Jahn-Teller effect</p> Signup and view all the answers

    Which of the following complexes typically exhibit first-order Jahn-Teller distortion with elongation?

    <p>Cu2+ (d9) complexes</p> Signup and view all the answers

    Which of the following is required for a second-order Jahn-Teller effect to occur?

    <p>Non-degenerate ground state</p> Signup and view all the answers

    In which geometry does the second-order Jahn-Teller effect cause a distortion towards a square pyramidal structure?

    <p>Trigonal bipyramidal</p> Signup and view all the answers

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