Synthesis and physical studies of lanthanide(III) complexes of N,N-bis(2-hydroxyethyl)glycinate (bicinate, bicH2−): molecular and crystal structure of [Gd(O2CMe)(bicH2)(phen)(H2O)](ClO4).phen.3H2O (phen=1,10-phenanthroline)

Synthesis and characterisation of Fe6 and Fe12 clusters using bicine

“…However, the only reported polynuclear complex with the bicine ligand is a hexa-nuclear [Fe 6 (Bic) 6 ] wheel [12] where each bicine ligand is tri-deprotonated. Previously, mono-deprotonated bicine has been used to prepare mononuclear copper and lanthanide complexes [13,14] and a one-dimensional polymeric manganese chain complex [15]. Herein, we report the synthesis and characterisation of two new Fe 6 and Fe 12 complexes with bicine, which display novel core topologies.…”

The succinamate(−1) ligand in 4f-metal chemistry: First example of amide coordination in the double-chain 1D coordination polymer catena-aquatris(succinamato(−1))erbium(III)

“…b Solid-state (diffuse reflectance) spectra. c For the definition of the bonding parameters b, d (%) and b 1/2 , see text and [27] and [28]. d Calculated from the wavenumbers of the 4 I 15/2 !…”

“…All nonhydrogen atoms were refined anisotropically. calculated from the solid-state (diffuse reflectance) f-f spectra by standard equations [27,28], indicate that the interaction between Er III and Ho III and the ligands (LH À , H 2 O) is essentially electrostatic and that there is a minor participation of 4f orbitals in bonding [27,28].…”

“…IR assignments in Table 1 have been given in comparison with the data obtained for lithium succinamate (assumed to contain a ''free'' carboxylate group) and by studying the literature data [15,28]; they have also been assisted by NH/ND and OH/OD isotopic substitutions [25]. Owing to the presence of two different types of amide groups in 1 and 2, two m(C@O) and two [30].…”

The benzoate/nitrate/2,2′:6′,2″-terpyridine ‘blend’ in lanthanide(III) chemistry: Relevance to the separation of lanthanides and actinides by solvent extraction

“…3 P 2 , 3 P 1 , 3 P 0 and 1 D 2 transitions, respectively [17]. For 1, the values of the bonding parameters b (nephelauxetic ratio), d (Sinha's parameter) and b 1/2 (covalent factor), calculated from the solid-state electronic spectra by standard equations [17,18], are 0.995, +0.50 and 0.050, respectively; the corresponding values for 2 are 0.994, +0.60 and 0.055. These values indicate that the interaction between Pr III and the ligands is essentially electrostatic and that there is a minor participation of the 4f orbitals in bonding [17,18].…”