Transition Metals and Coordination Chemistry

f-block elements in period 7 of the periodic table, which consists of elements actinium (Ac) through lawrencium (Lr)

ligand in a coordination complex that donates two pairs of electrons to the central metal atom or ion

coordination complex formed between a central metal atom or ion and chelating ligands, which are ions or molecules that bond to it with more than one atom

geometric arrangement in which two identical substituents are on the same side of the central part of a molecule or an ion

central metal atom or ion surrounded by ligands, as well as bonded ions if the central part has an overall charge

number of atoms bound to the single central metal center in a coordination complex

part of a coordination complex consisting of the central metal atom or ion and all ligands surrounding it

energy difference between the higher energy $e_g$ (${d_{{z^2}}}$and ${d_{{x^2}-{y^2}}}$) and lower energy $t_{2g}$ (${d_{xy}}$, ${d_{yz}}$, and ${d_{xz}}$) symmetric orbitals

electrostatic model that is used to describe and predict energy differences between nd orbital sets in transition metal complexes

element with one or more valence electrons in a d orbital

element with 4f or 5f electrons in its valence shell

one of two or more molecules that have the same molecular formula and bond structure but differ in the positions of substituents around a rigid part of the molecule

complex in which electrons fill higher orbitals singly and the pairing energy is large relative to the crystal field splitting energy

one of two forms of a coordination complex that differ only in which of two species is a ligand and which is outside the coordination sphere

one of two or more molecules that share the same chemical formula but have different arrangements of atoms

f-block elements in period 6 of the periodic table, which consists of elements lanthanum (La) to lutetium (Lu)

ion or molecule that bonds to a central metal atom or ion as part of a coordination complex

one of two or more coordination complexes that differ in how a ligand is bonded to the central metal atom or ion

complex in which electrons preferentially pair in lower-energy orbitals and the pairing energy is small relative to the crystal field splitting energy

ligand in a coordination complex that donates a single pair of electrons to the central metal atom or ion

one of a pair of mirror-image molecules that are not identical and cannot be superimposed

energy required for two electrons to occupy a single orbital

ligand in a coordination complex that donates three or more pairs of electrons to the central metal atom or ion

one of 15 lanthanides and 2 transition metals that have similar chemical properties and are commonly found together in nature

technique by which an elemental metal is extracted from its ore through heating and melting

list of ligands ordered according to their ability to induce crystal field splitting for a common metal center

material that can conduct electric current with almost zero resistance when cooled to appropriate temperatures

geometric arrangement in which two identical substituents are on opposite sides of the central part of a molecule or an ion

element in groups 3 through 12 of the periodic table