8. Compounds and Complexes Flashcards
What is an anion?
a negatively charged ion
What is a cation?
a positively charged ion
What is a coordinate bond?
a covalent bond between a Lewis acidic metal ion and a Lewis basic ligand in which both electrons originate from the ligand
What is a coordination complex?
acoordination complexconsists of a central atom or ion, which is usually metallic and is called thecoordinationcentre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents
What is a coordination number?
the number of donor atoms coordinated to a metal ion
What is a counter ion?
an ion that balances the charge on a cationic or anionic complex ion
What is dissociation?
a general process in which molecules separate into smaller particles
What is a donor atom?
an atom of a ligand in a complex that is directly coordinated to the transition metal ion
What is Kepert theory?
a modification of VSEPRtheoryused to predict the 3-dimensional structures of transitional metal complexes
What is a Lewis acid?
an electron-pair acceptor
What is a Lewis base?
an electron-pair donator
What is a ligand?
a molecule or an anion that can coordinate to a transition metal ion to form a complex
What is a octahedral conformation?
describes a molecule in which a central atom is surrounded by six atoms located at the vertices of an imaginary octahedron
What is an oxoanion?
a negatively charged ion containing two or more elements, one of which is oxygen
What is a square planar conformation?
a geometry adopted by 4-coordinate complexes in which the four M-L bonds point to the corners of a square
