(Terpyridine)ruthenium trichloride is the coordination complex with the formula RuCl3(terpy), where terpy is terpyridine.

It is a brown paramagnetic solid that is a precursor to other complexes of ruthenium, mainly by substitution of the chloride ligands.

The complex has octahedral geometry.

[1] The synthesis of this complex was reported for the first time in 1980, it was prepared by mixing ruthenium trichloride and terpyridine in ethanol, heating the mixture to reflux conditions[2] A later synthetic protocol uses a similar approach by heating ruthenium trichloride with a DMF solution of terpyridine.

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