Stepwise assembly of linearly-aligned Ru–M–Ru (M = Pd, Pt) heterotrimetallic complexes with σ-4-ethynylpyridine spacer†
Abstract
Two heterotrinuclear oligomeric complexes [trans-RuCl(CCpy-4)(dppm)2]2[MCl2] (M = Pd 2; M = Pt 3) are prepared from the metalloligand trans-[RuCl(CCpy-4)(dppm)2] (dppm = Ph2PCH2PPh2, 1). The resultant linear alignment of the metals [Ru-M-Ru] is imposed by a combinative use of trans-directed spacers and planar metals with trans-juxtaposed donor sites.