Chlorous anhydride

In his Confessions d un chimiste ordinaire (1981), Jacques mused that this state of affairs exists partly because chemists rarely write about their discipline for the general public like their biologist and physicist colleagues. And chemists have contributed to the view of their metier as a descriptive, empirical science. Recalling a late-nineteenth-century course he attended at the Sorbonne, Lespieau remarked in 1913, "Four and a half hours was all the time devoted to generalities if one had doubled this time, it would not have been detrimental to the seventeenth property of chlorous anhydride. "5... 

Preparatum.—By the action of water upon chlorous anhydride —... 

D. I. Mendeleeff noted that a mixture of equal volumes of chlorine, chlorine di-and tri-oxides has a density corresponding with the value observed by N. A. E. Millon, and therefore inferred that Millon s gas probably contains a mixture of approximately equal volumes of chlorine dioxide, C102, chlorine trioxide, C1203, and chlorine. There is, however, no unimpeachable evidence which justifies even this assumption and it is now suppposed that the existence of the chlorine trioxide, the anhydride of chlorous acid, has not been established. 

Having considered the explosive chlorates, the explosive properties of chlorine dioxide, C102 should also be mentioned. Chlorine dioxide is a mixed chlorous-chloric anhydride... 

Chlorous Acld(called Chlorige Saure in Ger), HC102, mw 68.47. Thi-s acid, like hypochlorous (HCIO) and chloric (HClOa) acids, has never been isolated. It exists only in aq solns, or as salts calledChlorites(qv). Chlorous acid may be considered as a deriv of the unknown anhydride C1203. It was first prepd in an impure state by M. Martens in 1836 and by N.A.E. Millon in 1841 by dissolving C102 in water. A better method of prepn is to treat Ba chlorite with an equiv amt of dil H2S04 after filtering off the... 

D. Oxidation with Fremy s Salt, Ammonium Nitrate-Acetic Anhydride, Dioxygen-terr-butoxide, Sodium Periodate, Chlorous Acid... 

Robson (183) reported that the following compounds are known to repress the formation of chlorine dioxide from chlorous acid pyrophosphates (4) amines, especially ethylenediamine (184), and hydrogen peroxide, The repressors probably complex, or perhaps they react with one of the intermediates formed during the decomposition. The following compounds, on the other hand, are known to promote the production of chlorine dioxide from chlorous acid aldehydes, especially formaldehyde, and organic anhydrides such as acetic anhydride (3, 154). According to Masschelein... 

The gas condenses to a liquid at about 4°C. It is the anhydride of hypo-chlorous acid that is, it reacts with water to give hypochlorous acid ... 

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