Group 17 elements hydrogen halides

Because of the weakness of the Si-N bond, ring cleavage of cyclosilazanes occurs upon treatment with halides of main group elements. For more than 20 years after the synthesis of the six-membered ring (Me2SiNH)3, only the substitution reaction of the N-bonded hydrogen by one trimethylsilyl group was known.30... 

These compounds are liquids or low melting solids with characteristic foul and persistent odors. They can be stored under an inert atmosphere in the refrigerator for long periods without decomposition. At 20° they decompose slowly to diorgano ditellurium derivatives while in air, tellurium is deposited. Protic agents such as water, hydrogen halides, and alcohols cleave the tellurium-group TV element bond. 

Except for trimethylboron, which is a gas at room temperature, the trialkylborons are colorless liquids, but the triarylborons are crystalline. Unlike the alkyl derivatives of other elements of the Third Group, alkylborons are monomeric they are unaffected by water but react with halogens and hydrogen halides, yielding organic boron halides. 

Formation of H2 from hydrogen halides 1 Reaction with elemental group-IA metals 5,... 

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