Inorganic Chemistry, Vol.47, No.21, 9730-9732, 2008
First Paramagnetic 4d Transition-Metal Complex with a Redox-Active Tetrathiafulvalene Derivative, [Ru(salen)(PPh3)(TTF-CH=CH-Py)]BF4 [salen(2-) = N,N'-Ethan-1,2-diylbis(salicylidenamine), PPh3 = Triphenylphosphine, TTF-CH=CH-Py=4-(2-Tetrathiafulvalenylethenyl)pyridine]
The first paramagnetic 4d transition-metal complex with a redox-active tetrathiafulvalene ligand has been synthesized. The preparation, X-ray structure, electrochemistry, and electron paramagnetic resonance measurements of [Ru(salen)(PPh3)(TTF-CH=CH-Py)](BF4) [1(BF4)] are reported. The crystal structure reveals that the paramagnetic Ru-III (s = 1/2) center is in a tetragonally elongated octahedral geometry and the TTF-CH=CH-Py ligand is coordinated to the axial position of the Ru-III ion through the nitrogen atom of the pyridine group. Thus, 1 (BF4) is an attractive precursor to study future pi-4d interactions in dual-property conducting and magnetic materials.