Coordination Chemistry Flashcards
(31 cards)
What is coordination chemistry?
The study of compounds formed between metal ions and ligands.
Define a ligand.
A molecule or ion that donates a pair of electrons to a metal ion to form a coordination complex.
True or False: Coordination compounds only involve transition metals.
False
What is the coordination number?
The number of ligand donor atoms that are bonded to a central metal ion.
Fill in the blank: The most common coordination numbers are __, __, and __.
2, 4, 6
What type of geometry is associated with a coordination number of 4?
Tetrahedral or square planar.
Name a common bidentate ligand.
Ethylenediamine (en).
What is a chelate?
A complex formed when a ligand binds to a metal ion at multiple points.
True or False: The larger the ligand, the more stable the coordination complex.
False
What is the difference between monodentate and bidentate ligands?
Monodentate ligands bind through one donor atom, while bidentate ligands bind through two donor atoms.
What is the role of the central metal ion in a coordination complex?
To accept electron pairs from ligands and form coordinate covalent bonds.
Name one example of a coordination complex.
Hexaamminecobalt(III) chloride [Co(NH3)6]Cl3.
What is the significance of the crystal field theory?
It explains the electronic structure and properties of coordination complexes based on the interaction between ligands and metal d-orbitals.
Fill in the blank: In octahedral complexes, the d-orbitals split into __ and __ sets.
t2g and eg
What is the term for the ability of a metal ion to form complexes with various ligands?
Complexing ability.
True or False: Coordination complexes can exhibit geometric isomerism.
True
What is the term for two or more compounds having the same formula but different arrangements of atoms?
Isomerism.
What is the color of a coordination complex primarily determined by?
The nature of the metal ion and the ligands present.
Define the term ‘metal-ligand bond.’
A coordinate covalent bond formed when a ligand donates an electron pair to a metal ion.
What is a coordination sphere?
The central metal ion and the ligands directly bonded to it.
Fill in the blank: The oxidation state of the metal in a coordination complex is determined by the __ of the ligands.
charges
What is the role of solvent in coordination chemistry?
To stabilize the coordination complex and influence its reactivity.
What does the term ‘chelate effect’ refer to?
The increased stability of chelate complexes compared to non-chelating complexes.
True or False: All ligands are neutral molecules.
False
