Explain about monohalides, Chemistry

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Q. Explain about Monohalides?

Monohalides of the type M2X2, (where X = F, C1 and Br) are formed only by 0. S and Se. Oxygen monofluoride decomposes above 25 K. These monohalides have got structures similar to H2, O2, having E-E bonds.

Monohalides of Te and Po are not formed because Te-Te and Po-Po bonds are not stable.  The monohalides are slowly hydrolysed to give the oxoacid,

2Se2Cl2+ 2H2O -------------------> H2SeO2+ 3Se+ 4HCl

Sulphur can readily be dissolved into sulphur monochloride. S2, CI2 to give chlorosulphanp s,  such as. S3 CI2 , S4,Cl2 and so on upto S100 CI2.


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