dithionicadj.

/dʌɪθʌɪˈɒnɪk/

/dɪθɪˈɒnɪk/

Etymology: < di- comb. form + Greek θεῖον sulphur + -ic suffix. (The formative -thionic is used for a group of compounds containing H₂O₆, in combination with two or more atoms of sulphur.)

Chemistry.

In dithionic acid, a synonym of hyposulphuric acid, H₂S₂O₆, a dibasic acid not isolated in the pure state, but forming crystallizable salts, called dithionates n.

/daɪˈθaɪənət/

ΚΠ

1854 J. Scoffern in Orr's Circle Sci. Chem. 285 Hyposulphuric acid (Dithionic acid).

1868 H. Watts Dict. Chem. V. 637 Dithionic Acid, when concentrated as highly as possible, is an inodorous, strongly acid, hydrated liquid, of specific gravity 1·347; on attempting to concentrate it further, it resolved into sulphuric acid and sulphurous oxide..The dithionates are permanent at ordinary temperatures.

1883 J. T. Taylor Hardwich's Man. Photogr. Chem. (ed. 9) 97 All the acids being unstable with the exception of the Dithionic.

This entry has not yet been fully updated (first published 1897; most recently modified version published online March 2022).

thionic adj.

Brit.

/ˌθʌɪˈɒnɪk/

U.S.

/ˌθaɪˈɑnɪk/

in thionic acids, group name for the acids represented by the formula H₂S_nO₆, where n = 2, 3, and perhaps 6 (these acids are called dithionic, trithionic, tetrathionic, pentathionic, and hexathionic acid).

ΘΚΠ

the world > matter > chemistry > chemical substances > acids > [noun] > acids-named > containing sulphur > thionic acid

thionic acids1880

1880 Jrnl. Chem. Soc. 37 593 A qualitative reaction, by which pentathionic acid is clearly distinguished from any other of the thionic acids.

单词	dithionic
释义	dithionicadj. /dʌɪθʌɪˈɒnɪk//dɪθɪˈɒnɪk/ Etymology: < di- comb. form + Greek θεῖον sulphur + -ic suffix. (The formative -thionic is used for a group of compounds containing H₂O₆, in combination with two or more atoms of sulphur.) Chemistry. In dithionic acid, a synonym of hyposulphuric acid, H₂S₂O₆, a dibasic acid not isolated in the pure state, but forming crystallizable salts, called dithionates n. /daɪˈθaɪənət/ ΚΠ 1854 J. Scoffern in Orr's Circle Sci. Chem. 285 Hyposulphuric acid (Dithionic acid). 1868 H. Watts Dict. Chem. V. 637 Dithionic Acid, when concentrated as highly as possible, is an inodorous, strongly acid, hydrated liquid, of specific gravity 1·347; on attempting to concentrate it further, it resolved into sulphuric acid and sulphurous oxide..The dithionates are permanent at ordinary temperatures. 1883 J. T. Taylor Hardwich's Man. Photogr. Chem. (ed. 9) 97 All the acids being unstable with the exception of the Dithionic. This entry has not yet been fully updated (first published 1897; most recently modified version published online March 2022). > as lemmas dithionic thionic adj. Brit. /ˌθʌɪˈɒnɪk/ , U.S. /ˌθaɪˈɑnɪk/ in thionic acids, group name for the acids represented by the formula H₂S_nO₆, where n = 2, 3, and perhaps 6 (these acids are called dithionic, trithionic, tetrathionic, pentathionic, and hexathionic acid). ΘΚΠ the world > matter > chemistry > chemical substances > acids > [noun] > acids-named > containing sulphur > thionic acid thionic acids1880 1880 Jrnl. Chem. Soc. 37 593 A qualitative reaction, by which pentathionic acid is clearly distinguished from any other of the thionic acids. extracted from thio-comb. form < adj.1854 as lemmas
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dithionicadj.

> as lemmas