Single-crystal EPR studies of a spin-frustrated imidazolate-bridged trinuclear copper(II) complex

Cyclopentadienyl Ruthenium(II) Complexes with Bridging Alkynylphosphine Ligands: Synthesis and Electrochemical Studies

“…This distance is shorter than the Ru1ÀRu1' distance of 14.83 in 8. Although no related diruthenium compound has been crystallographically authenticated, the intermetallic distance in 7 is comparable to the metal-metal separation found by Manners and co-workers in the related squareplanar dipalladium derivatives [{PdI 2 …”

“…Thus, dppab (1) and tppab (2) were prepared from the corresponding terminal alkynes by a Ni-catalyzed cross-coupling reaction with chlorodiphenylScheme 1. Synthesis of the bidentate and tridentate ligands dppab 1 and tppab 2.…”

“…(dppe = Ph 2 PCH 2 CH 2 PPh 2 ) with bis-and trisphosphine ligands 1,4-(Ph 2 PC C) 2 C 6 H 4 (1) and 1,3,5-(Ph 2 PC C) 3 C 6 H 3 (2), prepared by Ni-catalysed cross-coupling reactions between terminal alkynes and diphenylchlorophosphine, has been investigated. Using metal-directed self-assembly methodologies, two linear bimetallic complexes, (5) species was synthesised, which is the first example of a chiral-at-ruthenium complex containing three different stereogenic centres.…”

“…In particular, transition-metal centres may introduce Lewis acidity, [1] magnetism, [2] redox activity [3] or luminescence [4] properties into metallopolymers and macrocyclic structures. The synthesis of metallomacrocycles represents an interesting area to explore the development of "hostguest" chemistry.…”

“…[10] A solution of a 1:2 ratio between [CpRuA C H T U N G T R E N N U N G (PPh 3 ) 2 Cl] and 1 in toluene heated at reflux did not yield 6, but rather gave the diruthenamacrocycle 7 as a single stable thermodynamic product. Complex 7 is likely to form through intermolecular thermal replacement of the triphenylphosphine ligand in 6 by the pending P donor atom of a second equivalent of the same ruthenium complex.…”