Benedikt, Rudolf, 1852-1896, Knecht, Edmund, 1861-1925 · London : G. Bell and Sons · leaf 80
ience sake the carbon atoms of the benzene ring are numbered from 1 to 6, beginning usually at the top and proceeding to the right hand. By this means it is possible to express a constitutional formula without making a diagram. The position (1, 2) is known as the ortho, (1, 3) as the meta, and (1,… … Ortho. Meta. Para.
Coal-tar colors
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