Sulfido refers to the ligand species S2−. There is only one donor atom present in this ligand which is sulfur.[1] It also refers to the ligand or functional group −S, which is a sulfur atom bonded to the rest of molecule by a single bond, and has a charge of −1.

References

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  1. ^ Shriver and Atkins. Inorganic Chemistry (5th Edition). W. H. Freeman and Company, New York, 2010, pp 201.