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Isomeric   Listen
adjective
isomeric  adj.  (Chem.) Having the same chemical composition and molecular weight; having the same number of atoms of each kind in the molecule; said of chemical compounds with known chemical composition. This property used to be called metameric to distinguish it from other forms of isomerism. Note: Formerly the term isomeric applied also to comopounds having the same percentage chemical composition, even if the number of atoms in a molecule differed. In the 1913 dictionary isomeric was defined as: "Having the same percentage composition; said of two or more different substances which contain the same ingredients in the same proportions by weight, often used with with. Specif.:
(a)
Polymeric; i. e., having the same elements united in the same proportion by weight, but with different molecular weights; as, acetylene and benzine are isomeric (polymeric) with each other in this sense. See Polymeric.
(b)
Metameric; i. e., having the same elements united in the same proportions by weight, and with the same molecular weight, but with a different structure or arrangement of the ultimate parts; as, ethyl alcohol and methyl ether are isomeric (metameric) with each other in this sense. See Metameric."






Collaborative International Dictionary of English 0.48








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"Isomeric" Quotes from Famous Books



... radical were combined; this supplementary requisite was due to the discovery of the isomerism of silver fulminate and silver cyanate by Justus von Liebig in 1823, and to M. Faraday's discovery of butylene, isomeric ...
— Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 - "Chtelet" to "Chicago" • Various

... example, indeed, furnishes a most characteristic illustration of our theory. In the case just now assumed we arrive at the oxychloride; when, however, the metal and chlorine change places in the water molecule, the isomeric hypochlorous salts are the result. It is true that such cases of isomerism are as yet unknown, but we do know that certain metals, in our present state of knowledge, yield oxychlorides only, while others only form hypochlorous salts. This condition ...
— Scientific American Supplement No. 822 - Volume XXXII, Number 822. Issue Date October 3, 1891 • Various

... asserts that the germs of this fungus get into the urine after it has been passed. Urates appear in division B. These indicate waste of flesh, as in fevers, consumption, prolonged physical efforts, etc. Division C pictures urates of ammonia. These appear in alkaline decomposition of the urine; it is isomeric with uric acid in acid urine. In division D is represented urate of soda, which is present in the tissues of persons suffering from gout. The crystals shown in division E consist of the ...
— The People's Common Sense Medical Adviser in Plain English • R. V. Pierce

... artificially. Chemists have discovered the art of building them up from the simpler to the more complex, and do not doubt that they will eventually produce the most complex. Moreover, the phenomena attending isomeric change give a clue to those movements which are the only indications we have of life in its lowest forms. In various colloidal substances, including the albuminoid, isomeric change is accompanied by contraction or expansion, and consequent ...
— Essays: Scientific, Political, & Speculative, Vol. I • Herbert Spencer



Words linked to "Isomeric" :   isomerism



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