Defn: That variety of xylene in which the two methyl groups are in the ortho position; a colorless, liquid, combustible hydrocarbon resembling benzene.
When toluene is treated with chlorsulphonic acid there are formed besides the ortho- and para- chlorides also ortho and para sulphonic acids.
When treated with PCl{5} in the manner already described this gave a mixture of ortho and para sulphonchlorides consisting of about ⅓ ortho and ⅔ para.
The difficulty with this method is however that the larger part of the product is the para and only a comparatively small proportion of the ortho compound is formed.
A Graflex camera was used with Seed L Ortho plates and a three-times screen, and one-fortieth of a second exposure sufficed at F 8.
The negative was made with a Goerz Dagor lens in a Lancaster reflex upon a Seed Ortho L plate.
When toluene is nitrated, the para and ortho are chiefly formed, and a very little of the meta compound.
The ortho compound crystallises in tables, and the para in needles.
Somewhat later, they found that it could be prepared from diazobenzene imide, provided a nitro group were present in the ortho or para position to the diazo group.
Auwers then concluded that the para compounds are phenolic and the ortho compounds are quinone hydrazones or act as such.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "ortho" in a variety of sentences. We hope that you will now be able to make sentences using this word.
