Synthesis and electrochemical characterization of [Ru(NCCH3)6]2+, tris(acetonitrile) tris(pyrazolyl)borate, and tris(acetonitrile) tris(pyrazolyl)methane ruthenium(II) complexes

► An improved synthesis for hexakis(acetonitrile) ruthenium(II) tetrafluoroborate. ► Improved syntheses of tris(acetonitrile) tris(pyrazolyl)borato complexes. ► New synthesis of tris(acetonitrile) tris(pyrazolyl)methano ruthenium(II) complexes. ► Ru3+/2+ redox potentials of these complexes can be tuned in a 427 mV range.