| slovo | definícia |
optical isomer
(gcide) | Isomer \I"so*mer\ ([imac]"s[-o]*m[~e]r), n. [See Isomeric.]
(Chem.)
A compound which is isomeric with another body or compound; a
compound having the same chemical composition as another
compound; a member of an isomeric series.
[1913 Webster +PJC]
Note: An isomer may be a structural isomer, in which some
of the atoms are bonded to different atoms (as in
CH3.CH2.NH2 and CH3.NH.CH3), or an {optical
isomer}, in which the number and types of chemical
bonds are identical, but the arrangement of the atoms
in three-dimensional space is different; the latter are
also called stereoisomers.
[PJC] |
| | podobné slovo | definícia |
optical isomerism
(gcide) | Isomerism \I*som"er*ism\, n. (Chem.)
The state, quality, or relation, of two or more isomeric
substances.
[1913 Webster]
Physical isomerism (Chem.), a former term for {optical
isomerism}.
optical isomerism (Chem.), the condition or relation of
certain (isomeric) substances, which, while chemically
identical (in that they have the same composition, the
same molecular weights, and the same ultimate
constitution), are yet physically different, as in their
action on polarized light, as dextro- and l[ae]vo-tartaric
acids, or the sugars galactose and glucose. In such
compounds there is usually at least one unsymmetrical
carbon atom and typically more than one. See
Unsymmetrical.
[1913 Webster +PJC] |
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