small quantities in cells on a plate,
and properties are investigated by
some automated technique. It is particularly used in the development of
new drugs.
combustion A chemical reaction
in which a substance reacts rapidly
with oxygen with the production of
heat and light. Such reactions are
often free-radical chain reactions,
which can usually be summarized as
the oxidation of carbon to form its
oxides and the oxidation of hydrogen
to form water. See also flame.
commensurate lattice A lattice
that can be divided into two or more
sublattices, with the basis vectors of
the lattice being a rational multiple
of the basis vectors of the sublattice.
The phase transition between a commensurate lattice and an incommensurate lattice can be analysed using
the Frenkel–Kontorowa model. An
ion that is common to two or more
components in a mixture. In a solution of XCl, for example, the addition
of another chloride YCl, may precipitate XCl because the solubility product is exceeded as a result of the
extra concentration of Cl
_ ions. This
is an example of a common-ion
effect.
common salt See sodium
chloride.
competitive inhibition See inhibition.
combustion
136
c
octahedral
square-planar
tetrahedral
trigonal-bipyramid
Complexes
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