Synthesis, properties, and x-ray characterization of aquo and hydroxo complexes of cobalt(II) and nickel(II) with poly(tertiary phosphines)

Preparation and properties of sandwiched trinuclear palladium(II) complexes with tridentate phosphine and phosphine sulfide ligands

“…3,2001) and the collected data were reduced using the program CrystalStructure (Rigaku and MSC, version 3.8, 2006). Empirical absorption corrections were applied.…”

“…The iodine atom (I4) in 3$4CHCl 3 was found to be disordered over two sites in a ratio of 0.5:0.5. The structure of 4$4CHCl 3 …”

“…Structure, properties, and reaction mechanisms of five-coordinate trigonal-bipyramidal d 8 metal complexes have been investigated so far by using the tripodal tetradentate ligands with soft donors such as tris [2-(diphenylphosphino)ethyl]phosphine (pp 3 ) [1e12], tris [2-(diphenylphosphino)ethyl]amine (np 3 ) [3e5,13e15], tris [2-(diphenylarsino)ethyl]amine (nas 3 ) [4,6,13]. On the other hand, employing tripodal tridentate ligands is of interest because equivalent coordination of the three donor atoms of the tripodal ligands does not make usual square-planar or trigonal-bipyramidal structures of the d 8 metal complexes.…”

“…In this work, we have attempted selective oxidation of the central phosphino group of pp 3 to give the Pd(II) complex with the tripodal tridentate ligand considering that the phosphine phosphorus is a good donor for Pd (II) while the phosphine oxide is scarcely coordinated to Pd(II). The coordination behavior of the pp 3 monooxide ligand (pOp 3 ) was compared with that of 1,1,1-tris(diphenylphosphinomethyl)ethane (i-p 3 ), which is a smaller tripodal tridentate ligand with shorter carbon chains.…”

Metallionen in einseitig von H-Brücken begrenzten Hohlräumen: ein Redoxpaar koordinativ ungesättigter paramagnetischer Co-OH-Komplexe

“…Co-OH-Komplexe sind zwar bekannt, doch sind viele davon mehrkernig und enthalten verbrückende Hydroxoliganden. [10] Tatsächlich wurden nur zwei strukturell charakterisierte monomere Co-OH-Komplexe beschrieben: [11] ein quadratisch-pyramidaler Low-Spin-Co II -OH-Komplex [12] und der sechsfach koordinierte Komplex [Co(terpy)(h 2 -CO 3 )(OH)] (terpy 2,2':6',2''-Terpyridin). [13] Überdies sind Co III -Komplexe normalerweise diamagnetisch, während 2 und 3 paramagnetisch sind.…”