X-ray Structure of a Ruthenium Dinuclear Complex Incorporating 4,4′-Bis(cyanamidophenylethynyl)benzene as a Ligand, a Conjugated Bridge Two Nanometers in Length

Abstract

Keywords: Ruthenium / Bridging ligands / N ligands / X-ray structureThe reaction of [Ru(bpy)(tpy)(Ipcyd)] + (bpy = 2,2Ј-bipyridine, tpy = 2,2Ј:6Ј,2ЈЈ-terpyridine, Ipcyd = 4-iodophenylcyanamide anion) with diethynylbenzene in a Sonogashira cross-coupling reaction gives an unprecedentedly long and conjugated dinuclear complex [{[Ru(bpy)(tpy)] 2 (µ-dcpeb)}(BPh 4 ) 2 ]· 4(PhCH 3 ) (dcpeb = dicyanamidophenylethynylbenzene dianion). The crystal structure data are as follows: crystal sys-

Synthesis of new potential ligands for metal complex wires: 2-pyridinmethyl-{4-[(2-pyridinylmethylimino)-methyl]-benzylidene}amines

“…By comparison with various bis-bidentate and bis-tridentate ligands for the synthesis of known bimetallic or polymetallic complexes in the literature, 17,18 we describe here bis-bidentate ligands, for which the synthesis is relatively easy. Their synthesis from benzene-1,4-dicarbaldehyde could certainly be generalised to a large variety of other aromatic di-aldehydes.…”

(Terpyridine)(acetylacetonate)ruthenium(II) complex with a zwitterionic form of phosphoniophenylcyanamide ligand

“…The chloride ligand on Ru(tpy)(acac)Cl is easily displaced in refluxing ethanol/water by adding AgBF 4 , permitting the synthesis of [Ru(tpy)(acac)L], where L is an anionic ligand such as 4-Iodophenylcyanamide (or Ipcyd). This ligand is of particular interest since it can serve as precursor to bimetallic complexes [8]. and zinc powder in DMF.…”

Crystal Structure of N,N,N’,N’-tetra-[(3,5-dimethyl-1-pyrazolyl) methyl]-para-phenylenediamine

“…We are currently working on the synthesis and coordination of mono-tripodal nitrogen ligands, such as N,N-bis-[(3,5-dimethyl-1-pyrazolyl) methyl] alkylamines [ 3 ] to gain insight into the coordination behaviour of larger ligand systems containing at the same time nitrogens of pyrazolyl groups as potential N-donor atoms, and a delocalised π-conjugated spacer as aryldiamine. This research effort is directed to the preparation of new mixed valence transition metal complexes for catalysis, with a particular interest in electronic communication [ 4 , 5 ]. The X-ray structure of N,N,N’,N’-tetra-[(3,5-dimethyl-1-pyrazolyl)methyl] para -phenylenediamine ( 4 ) ( Scheme1 ) was determined to establish its spatial conformation.…”