Disulfonyl bisisocyanate

Disulfonyl bisisocyanate
Disulfonyl bisisocyanate
Are common
Systematic ; name	Disulfonyl bisisocyanate
Traditional names	Disulfuryl cyanate; disulfuryl isocyanate
Chem. formula	S 2 O 5 (NCO) 2
Physical properties
condition	colorless liquid or crystals
Molar mass	228.16 g / mol
Density	1.76 g / cm³
Thermal properties
T. melt.	26.8 ° C
T. Kip.	46 0.2 mm Hg ° C
T.	120-130 ° C

Disulfonyl bisisocyanate — an inorganic compound, isicianic disulfuric anhydride with the formula S ₂ O ₅ (NCO) ₂ , a colorless liquid or crystals, decomposes in water.

Content

Getting

The reaction of bromine cyan and sulfur trioxide, followed by fractional distillation of the reaction products:

{\mathsf {2SO_{3}+2BrCN\ {\xrightarrow {-20^{o}C}}\ SO_{2}(NCO)_{2}+Br_{2}+SO_{2}}}

{\ displaystyle {\ mathsf {2SO_ {3} + 2BrCN \ {\ xrightarrow {-20 ^ {o} C}} \ SO_ {2} (NCO) _ {2} + Br_ {2} + SO_ {2}} }}

{\mathsf {SO_{2}(NCO)_{2}+SO_{3}\ {\xrightarrow {-20^{o}C}}\ SO_{2}(NCO)_{2}}}

{\ displaystyle {\ mathsf {SO_ {2} (NCO) _ {2} + SO_ {3} \ {\ xrightarrow {-20 ^ {o} C}} \ SO_ {2} (NCO) _ {2}} }}

Physical Properties

Disulfonyl bisisocyanate forms a colorless liquid or crystals.

Chemical Properties

Reacts violently with water to form aminosulfonic acid :

{\mathsf {S_{2}O_{5}(NCO)_{2}+3H_{2}O\ {\xrightarrow {}}\ 2NH_{2}SO_{3}H+2CO_{2}}}

{\ displaystyle {\ mathsf {S_ {2} O_ {5} (NCO) _ {2} + 3H_ {2} O \ {\ xrightarrow {}} \ 2NH_ {2} SO_ {3} H + 2CO_ {2} }}}

Decomposes when heated to form the sulfonyl bisisocyanate :

{\mathsf {S_{2}O_{5}(NCO)_{2}\ {\xrightarrow {120-130^{o}C}}\ SO_{2}(NCO)_{2}+SO_{3}}}

{\ displaystyle {\ mathsf {S_ {2} O_ {5} (NCO) _ {2} \ {\ xrightarrow {120-130 ^ {o} C}} \ SO_ {2} (NCO) _ {2} + SO_ {3}}}}

Literature

Manual on inorganic synthesis: B 6 tons / Ed. Brower G. .. - M .: Mir, 1985. - T. 2. - 338 p.
Nekrasov B.V. Fundamentals of General Chemistry .. - 3rd ed., Rev. and additional .. - M .: "Chemistry", 1973. - T. 1. - 656 p.