The novel chelating PNP pincer ligand 2,5-bis((diphenylphosphino)methyl)-1H-pyrrole (1) was prepared and its nickel coordination chemistry explored. The reaction with Ni(COD)(2) led to a diamagnetic dinuclear nickel(I) complex (4) which was also obtained by the reaction of the square planar Ni(II) complexes [(PNP-Ph(2))NiX] (X = Cl (2), X = I (3)) with Li(Et(3)BH).

The oxidative addition of cyclic ditelluride 1-oxa-5,6-ditelluraspirooctane, Te(2)C(5)H(8)O, to bis(triphenylphosphine)(norbornene)platinum(0), [Pt(PPh(3))(2)(eta(2)-nb)], and to [1,8-bis(diphenylphosphino)naphthalene](norbornene)platinum(0), [Pt(dppn)(eta(2)-nb)], lead to the formation of dinuclear and mononuclear tellurolato platinum(ii) complexes, respectively, as a consequence of Te-Te bond...

Representative models of the different geometries observed for uranyl complexes with fully deprotonated p-R-hexahomotrioxacalix[3]arene (R = tert-Bu, Me) ligands, among which is the rare trigonal geometry, have been investigated using all-electron scalar relativistic density functional theory (DFT). Optimized structures of complexes incorporating triethylammonium (HNEt3+) and 4-methylpiperidini...

Two Ni(II) complexes with the formula [{Ni(dppf)}2{(L1)2}](PF6)2 (Ni-I) and [{Ni(dppe)}2{(L1)2}](PF6)2 (Ni-II) were prepared by reacting [Ni(dppf)Cl2] [Ni(dppe)Cl2] (dppf = 1,1′-Bis-(diphenylphosphino)ferrocene; dppe 1,2-Bis-(diphenylphosphino)ethane) secondary amine piperazine derived ligand disodium bis-(dithiocarbamate)piperazine ((piper(dtc)2 L1) counter anion PF6−. These characterized elem...

t X-rayy crystal structures of a series of cationic (P-P)palladium(3,3-(CH3)2-C3H3) complexes (P-P = dppe (1,2bis(diphenylphosphino)ethane),, dppf (l,l'-bis(diphenylphosphino)ferrocene), DPEphos) and the (Xantphos)Pd(C3H5)BF44 complex have been determined. In the solid state structure, the phenyl rings of the ligandss are oriented in the direction of the non-symmetrically bound [3,3-(CH3)2-C3H3...

A series of bis(diphenylphosphino)amine ligands with a donor group attached to the nitrogen linker have been prepared. Metalation of these ligands with chromium trichloride provides precursors to highly active, relatively stable, and selective catalysts for trimerization and tetramerization of ethylene. It has been demonstrated in oligomerization reactions performed at 1 and 4 atm of ethylene t...