What is the name of the compound #"SI"_6"#?

1 Answer
Nov 10, 2015

The name of the compound #"SI"_6"# is sulfur hexiodide.


Since sulfur and iodine are nonmetals, this is a binary molecular compound. A binary molecular compound is named so that its subscript numbers are indicated as Greek prefixes in its name. However, if the first element has a subscript of 1 (understood), the prefix mono - is not used. The name of the second element in the compound loses one or two syllables, and it ends with the suffix #("-ide")#. The compound #"SI"_6"# is named sulfur hexiodide, as the prefix for #6# is hexa -, and the name for iodine is changed to iodide.