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Ligand that exerts a strong crystal or ligand electrical field and generally forms low spin complexes with metal ions when possible.

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Polyene

A compound that contains more than one double bond per molecule.

Half-Reaction

Either the oxidation part or the reduction part of a redox reaction.

Effective Collisons

Collision between molecules resulting in a reaction, one in which the molecules collide with proper relative orientations and sufficient energy to react.

 

Dissociation Constant

Equilibrium constant that applies to the dissociation of a comples ion into a simple ion and coordinating species (ligands).

20 interesting chemistry facts

20 interesting chemistry facts.

Homonuclear

Consisting of only one element.

Band

A series of very closely spaced, nearly continuous molecular orbitals that belong to the crystal as a whole.

Effective Nuclear Charge

The nuclear charge experienced by the outermost electrons of an atom, the actual nuclear charge minus the effects of shielding due to inner-shell electrons.
Example: Set of dx2-y2 and dz2 orbitals, those d orbitals within a set with lobes directed along the x-, y-, and z-axes.

Absolute Zero

The zero point on the absolute temperature scale, -273.15°C or 0 K, theoretically, the temperature at which molecular motion ceases. The concept of an absolute zero temperature was first deduced from experiments with gases. When a fixed volume of gas is cooled, its pressure decreases with its temperature. Absolute zero physically possesses quantum mechanical zero-point energy.

Valence Bond Theory

Assumes that covalent bonds are formed when atomic orbitals on different atoms overlap and the electrons are shared.