Synthesis and Reactions
Mo6Cl12 is prepared by the reaction of molybdenum(V) chloride with molybdenum metal:
- 12 MoCl5 + 18 Mo → 5 Mo6Cl12
This reaction proceeds via the intermediacy of MoCl3 and MoCl4, which also are reduced by the presence of excess Mo metal. The reaction is conducted in a tube furnace at 600–650 °C.
Once isolated, Mo6Cl12 undergoes many reactions with retention of the Mo612+ core. Heating in concentrated HCl gives (H3O)2. The terminal chloride ligands, labeled "ausser" are readily exchanged:
- (H3O)2 + 6 HI → (H3O)2 + 6 HCl
Under more forceful conditions, all 14 ligands can be exchanged, to giving salts of 2- and 2-.
Read more about this topic: Molybdenum(II) Chloride
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