Experimental and theoretical studies of a triazole ligand and complexes formed with the lanthanides

Systematics and surprises in lanthanide coordination chemistry

“…6). Others carried out the syntheses in MeCN, finding it 'very difficult to grow crystals and very few structures have been obtained' [42]; in fact they have reported the structure of just [Sm(tptz)(NO3)3(H2O)].2H2O [43]. Thus uncoordinated solvent molecules trapped in the lattice can influence crystal growth.…”

Two pseudo-N3 ligands and the catalytic activity of their ruthenium(II) complexes in transfer hydrogenation and hydrogenation of ketones

“…Synthesis and X-ray crystal structure of complex 5 Ligand 4 was prepared by means of a modified literature procedure (Chart 3) [6,8]. Condensation of pyridine-2,6-dicarbohydrazide imide (2) with 1,2-diketone (3) at heating afforded 2,6-bis(5,6-bis(iso-butyl)-1,2,4-triazin-3-yl)pyridine (iBu-BTP) (4).…”

“…Non-planar pseudo-N 3 ligands hydridotris(pyrazol-1-yl)borates (D, Tp) have also been employed to build transition metal catalysts [5]. Planar N 3 ligand 2,6-bis (5-methyl-1,2,4-triazol-3-yl)pyridine (E, BMTZP) was used to synthesize lanthanide complexes [6]. Very recently, bis(pyrazol-1-yl)pyridines (F) were reported to construct rare transition metal catalysts from our laboratories [7a,7b] and Karam's group [7c], respectively.…”

Development of Highly Selective Ligands for Separations of Actinides from Lanthanides in the Nuclear Fuel Cycle

“…45 X-ray crystallographic analysis revealed the formation of five structural types. In each case, the tridentate ligand formed 1:1 complexes and the remainder of the metal's inner coordination sphere was occupied by a combination of water molecules and nitrate ions.…”