Is SCN monodentate or bidentate?

Answers (1)

SCN is a monodentate ligand because only one donor atom gets attached to the metal at a time. However it is ambidentate in nature because either of the two atoms S or N can act as the donor atoms.

Please remember that there are instances where SCN- has used both of its donor atoms at the same time but they are attached to different metal atoms, in that case case we can call it a bridging ligand but never bidentate.

[ If any ligand has to be called a bidentate ligand it must be able to attach itself to one metal atom using two of its donor atoms.]

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