Inorganic Chemistry & Coordination Compounds Flashcards
7 cards from real CPC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Inorganic Chemistry & Coordination Compounds flashcards as text
What is the coordination number of the central metal ion in [Co(NH3)6]3+?
Answer: 6
The coordination number equals the number of ligands directly bonded to the central metal; in [Co(NH3)6]3+, six NH3 molecules coordinate to cobalt.
Which of the following best describes a chelating ligand?
Answer: A ligand that binds to the metal at two or more donor atoms, forming a ring
Chelating (polydentate) ligands coordinate through two or more donor atoms simultaneously, forming a ring structure with the metal center.
What is the ground-state electron configuration of Fe2+?
Answer: [Ar] 3d6
Neutral Fe is [Ar] 3d6 4s2; losing two electrons removes the 4s electrons first, yielding [Ar] 3d6 for Fe2+.
In an octahedral crystal field, which d-orbitals constitute the eg set?
Answer: dx²−y² and dz²
The eg set (dx²−y² and dz²) points directly toward the six ligands along the axes and is destabilized more than the t2g set.
What type of isomerism is exhibited by [Co(NH3)4Cl2]NO2 and [Co(NH3)4ClNO2]Cl?
Answer: Ionization isomerism
Ionization isomers produce different ions in solution; the first complex releases NO2− while the second releases Cl− as the counter ion.
The color of transition metal coordination compounds arises primarily from which electronic transition?
Answer: d-d transitions
Visible color in transition metal complexes typically results from d-d transitions, where electrons are promoted between crystal-field-split d-orbital levels.
What is the oxidation state of manganese in KMnO4?
Answer: +7
With K at +1 and four oxygens at −2 each (total −8), the sum must equal zero, requiring Mn to be +7.