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Positively charged or electron-deficient.

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Ether

Compound in which an oxygen atom is bonded to two alkyl or two aryl groups, or one alkyl and one aryl group.

Chemical Kinetics

The study of rates and mechanisms of chemical reactions and of the factors on which they depend.

Coordination Sphere

The metal ion and its coordinating ligands but not any uncoordinated counter-ions.

Lanthanide Contraction

A decrease in the radii of the elements following the lanthanides compared to what would be expected if there were no f-transition metals.

Acyl Group

Compound derived from a carbonic acid by replacing the --OH group with a halogen (X), usually --Cl, general formula is O R--C--X.

Salicylaldehyde

An oily, slightly water-soluble liquid, C7H6O2, having an almondlike odor: used chiefly in perfumery and in the synthesis of coumarin.

Coulomb

Unit of electrical charge.

Oxidation-reduction Reactions

Reactions in which oxidation and reduction occur, also called redox reactions.

xanthate

A salt or ester of xanthic acid. Many xanthates have a yellow color. Xanthates are used as flotation agents in mineral processing.

Reaction Stoichiometry

Description of the quantitative relationships among substances as they participate in chemical reactions.

Dispersed Phase

The solute-like species in a colloid.

Radioactive Tracer

A small amount of radioisotope replacing a nonradioactive isotope of the element in a compound whose path (for example, in the body) or whose decomposition products are to be monitored by detection of radioctivity, also called a radioactive label.

Amine Complexes

Complex species that contain ammonia molecules bonded to metal ions.

Explosive

A chemical or compound that causes a sudden, almost instantaneous release or pressure, gas, heat and light when subjected to sudden shock, pressure, high temperature or applied potential.

Fuel Cells

Voltaic cells in which the reactants (usually gases) are supplied continuously.
A voltaic cell that converts the chemical energy of a fuel and an oxidizing agent directly into electriacl energy on a continuous basis.

Electrode Potentials

Potentials, E, of half-reactions as reductions versus the standard hydrogen electrode.

Donor Atom

A ligand atom whose electrons are shared with a Lewis acid.

Third Law of Thermodynamics

The entropy of a hypothetical pure, perfect, crystalline sustance at absolute zero temperature is zero.

Sigma Orbital

Molecular orbital resulting from head-on overlap of two atomic orbitals.

Emulsifying Agent

A sustance that coats the particles of the dispersed phase and prevents coagulation of colloidal particles, an emulsifier.