What's the sulfur oxide with its lowest oxidation number?

1 Answer
May 29, 2015

The sulfur oxide with the lowest oxidation number for sulfur is cyclo-undecasulfur monoxide, #"S"_11"O"#.

The common oxides of sulfur are #"SO"_3# and #"SO"_2#.

The oxidation numbers of sulfur in these compounds are +6 and +4, respectively.

But there are oxides in which sulfur has an even lower oxidation number.

  • #"SO"# and #"S"_2"O"_2# (oxidation number = +2)
  • #"S"_2"O"# (oxidation number = +1)
  • #"S"_6"O"_2# (oxidation number = #+2/3#)
  • #"S"_7"O"_2# (oxidation number = #+4/7#)

There are sulfur oxides with general formula #"S"_n"O"#.

The oxide with the largest value of #n# is #"S"_11"O"# (oxidation number = #+2/11#).

These oxides all consist of a ring of sulfur atoms with an oxygen atom attached to one of the sulfurs.

For example, the structure of #"S"_8"O"# is

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