In contrast, both tetrahedral and square planar coordination has been observed upon complexation of chelating phosphine ligands. A combination of crystallographic and magnetic susceptibility data for (depe)Fe-(Mes)2 (depe = 1,2-bis(diethylphosphino)ethane) established a tetrahedral molecular geometry ...
网络四面体和平面四边形配合物
ChemInform Abstract: Mo(OH)n+ 4 (n = 0, 2), Tetrahedral or Square‐Planar? The dn‐d10‐n Hole Formalism for π‐Donor and π‐Acceptor Ligand Fields.theory, structuremolybdenum, MoFenske-Hall MO calculations are used to probe the electronic structure and bonding of d0 and d2 monomeric...
-methylsalicylaldiminato)nickel(II), its isomers and clusters containing up to ten molecules of the complex have shown that the metal chelate rings are intrinsically planar and their step-like distortion observed in the solid state is caused by the factors relevant to the crystal packing conditions...
A Chiral Cleft Ligand for Tetrahedral (T-4), Square Planar (SP-4), Trigonal Bipyramidal (TB-5), Square Pyramidal (SPY-5), and Octahedral (OC–6) Complexes Two tetradentate bispinene-bipyridine type ligands, each with six stereogenic carbon centers, were synthesized from (-)-alpha-pinene. ...
The square planar complexes 1–3 consist of a diamagnetic central Ni(II) ion and two strongly antiferromagnetically coupled ligand π-radicals as has been deduced from correlated ab initio calculations; they are singlet diradicals. The tetrahedral complexes 4–6 consist of a paramagnetic high-spin...
Tetrahedral versus square-planar NiS4 core in solid-state bis(dithioimidodiphosphinato)nickel(II) chelates. Crystal and molecular structures - Rösler, Silvestru, et al. - 1996 () Citation Context ... − ligand [5]. Moreover, the nature of the R and R ′ peripheral groups of the [...
Four tetracoordinate Ni(II) complexes have been prepared, structurally characterized, and subjected to magnetometric studies. The complexes [Ni(PPh3)(2)(NCS)(2)], [Ni(dppp)(NCS)(2)], and [Ni(dppm)Br-2] are planar and thus diamagnetic. The complex [Ni(biqu)Br-2] is quasi-tetrahedral...
8 Evans W J , Keyer R A , Ziller J W. Tetrahedral versus square planar arrangement of cyclopentadienyl ligands in bimetallic organosamarium complexes. X2ray crystal structure of [ (C5H4Me) 2 ( THF) Sm (渭2Cl) ] 2. J . Organomet . Chem. , 1993 , 450 :...
Tetrahedral versus square planar arrangement of cyclopentadienyl ligands in bimetallic organosamarium complexes. X-ray crystal structure of [(C,H,Me) 2(THF)Sm( p-Cl)], William J. Evans, Roy A. Keyer and Joseph W. ZillerThe effects of cyclopentadienyl ring size on the ...