Coordination Complexes and Absorption Spectra
30 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which type of ligands can cause asymmetrical negative field in a complex?

  • Anions (correct)
  • Neutral molecules
  • Metal atoms
  • Cations

    • What effect does the repulsion between metal d orbitals and ligands have in an octahedral coordination entity?

  • Raises energy of d x^2-y^2 and d z^2 orbitals (correct)
  • Removes degeneracy of the d orbitals
  • Increases degeneracy of the t2g set
  • Lowers energy of dxy, dyz, and dxz orbitals

    • What is the reason for the splitting of d orbitals in a complex?

  • Absence of negative charges
  • Presence of neutral molecules
  • Attraction between ligands and metal d orbitals
  • Repulsion between ligands and metal d orbitals (correct)

    • Which set of orbitals experiences more repulsion and is raised in energy in an octahedral complex?

    <p>d x^2-y^2 and d z^2</p> Signup and view all the answers

    What does the removal of degeneracy of the d orbitals result in?

    <p>Three orbitals of lower energy (t2g set) and two orbitals of higher energy (eg set)</p> Signup and view all the answers

    Which crystal field causes the lifting of degeneracy of d orbitals due to its nature?

    <p>Octahedral crystal field</p> Signup and view all the answers

    What is the coordination number of the complex [Cr(en)3]Cl3?

    <p>6</p> Signup and view all the answers

    Which complex exhibits ionisation isomerism?

    <p>[Co(NH3)5Br]SO4</p> Signup and view all the answers

    Why does NiCl4 have a +2 oxidation state while Ni(CO)4 has a zero oxidation state?

    <p>Presence of CO ligand pairs up d electrons in Ni(CO)4.</p> Signup and view all the answers

    How many optical isomers can exist for [Pt(NH3)BrCl(NO2)]?

    <p>2</p> Signup and view all the answers

    Which ligand leads to the hybridization of d2sp3 in a coordination complex?

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

    What type of isomers are possible for the complex Fe4[Fe(CN)6]3?

    <p>Ionisation and linkage isomers</p> Signup and view all the answers

    What term did Werner propose for the number of groups bound directly to the metal ion?

    <p>Secondary valence</p> Signup and view all the answers

    Which complex corresponds to the color yellow in the formulation of cobalt(III) chloride-ammonia complexes?

    <p>[Co(NH3)6]Cl3</p> Signup and view all the answers

    What is the common empirical formula for the last two compounds in Table 5.1?

    <p>CoCl3.4NH3</p> Signup and view all the answers

    What does a 1:2 electrolyte signify in the context of cobalt(III) chloride-ammonia complexes?

    <p>One mole of cobalt with two moles of ammonia</p> Signup and view all the answers

    According to Werner's theory, what satisfies the primary valences in coordination compounds?

    <p>Negative ions</p> Signup and view all the answers

    How many types of linkages did Werner propose metals to show in coordination compounds?

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

    Why does the complex [Ti(H2O)6]3+ appear violet in color?

    <p>Due to absorption of light corresponding to the energy of the blue-green region.</p> Signup and view all the answers

    Why is [Ti(H2O)6]Cl3 colorless when heated to remove water?

    <p>Due to the absence of ligands causing crystal field splitting.</p> Signup and view all the answers

    Which coordination entity absorbs light in the ultraviolet region?

    <p>[CoCl(NH3)5]2+</p> Signup and view all the answers

    What is the color observed for [Co(CN)6]3– coordination entity?

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

    What electronic configuration does titanium ([Ti]) have in the complex [Ti(H2O)6]3+?

    <p>[Ar] 4s^2 3d^1</p> Signup and view all the answers

    What causes the color of coordination compounds according to crystal field theory?

    <p>d-d transition of electrons.</p> Signup and view all the answers

    Which compound is used for the hydrogenation of alkenes?

    <p>[(Ph3P)3RhCl]</p> Signup and view all the answers

    In black and white photography, which complex ion is formed by dissolving undecomposed AgBr?

    <p>[Ag(S2O3)2]</p> Signup and view all the answers

    What type of therapy involves the use of chelating ligands to remove excess metals from plant/animal systems?

    <p>Chelate therapy</p> Signup and view all the answers

    Which compound is used in the treatment of lead poisoning?

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

    Which platinum compound effectively inhibits the growth of tumors?

    <p>cis-platin</p> Signup and view all the answers

    Coordination compounds are used as catalysts for which processes?

    <p>Hydrogenation of alkenes</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser