Exam 23: The Transition Elements and Their Coordination Compounds

A) State the requirement for two molecules to be optical isomers. B) A complex ion MABCD²⁺ (where A, B, C and D are different unidentate ligands) rotates the plane of polarized light. Deduce the geometry of the complex and draw the optical isomers of this ionic formula.

A certain transition metal complex has the formula MX₄²⁺. If the metal ion has a d⁸ electron configuration,what is the shape of the complex?

A certain transition element has the stable oxidation states of +2, +3, +4, +5, and +6. In which state will the element be most likely to form a covalent bond with chlorine?

A) How many unpaired 3d electrons will there be in (i) high and (ii) low-spin complexes of Co(II)? B) How can high and low-spin complexes be recognized and distinguished experimentally?

Which of the following ligands could participate in linkage isomerism?

Iron(III) forms an octahedral complex with the ligand CN¯. How many unpaired electrons are in the d orbitals of iron?

Which of the following ligands is most likely to form a high spin octahedral complex with cobalt(II)?

Which of the following transition elements can achieve the largest oxidation number?

The d_xy and the orbitals both lie in the xy plane, yet for a metal ion in an octahedral complex the energy of the d_xy orbital is lower than that of the orbital. Explain this using the arguments of crystal field theory.

Which of the following elements has the ground state electron configuration, [Xe]4f¹⁴5d¹⁰6s¹?

Of the 3d transition series of elements, zinc has the greatest atomic radius.

If a solution absorbs green light, what is its likely color?