No abstract

No abstract

No abstract

Five new complexes of lanthanide perchlorates with a new ligand O,O' diisopropyl N(‐4‐antipyryl) phosphoramidate (DIAP) of the general formula Ln(DIAP)4(ClO4)3 where Ln = La, Pr, Nd, Sm and Gd, have been synthesised and characterized by chemical analysis, IR(200–4000cm−1) and electronic spectra and electrical conductance data. Infrared spectral data indicate the coordination of the ligand to the metal ions in a bidentate fashion, through the C=O oxygen of the antipyrine group and the P=O group. IR and conductance values show that the three perchlorate groups are ionic. Electronic spectrum of the Nd3+ complex in the visible region, indicates reasonable covalency in the metal‐ligand bond. The available data point to an eight coordinate geometry around the metal ions, with each ligand behaving in a bidentate ‘00’ fashion.

Alamset. A substituted phosphoramidate has boon used as a ligand to lanthanidcs for the first time. New complexes of lanthanido nitrates with O,O',N-triisopropyl phosphoramidate (TIP) of the genexal formula Ln(TIP),(NOa)) wharr Ln = La --Yb and Y have been synthesisod and charactedscd by chcm_ical analysis, infrared and visible eiectronic spectra and electrical conductance.Infrared spectra indicate the coordination of the ligand to the metal ions through the oxygen of the P = O group. Ig and conductance show that the nitrate groups are all coordinated. Electronic spectral shapes have boon interpreted in terms of an eight coordinate geometry around the metal ions.Keywecds. Lanthanide nitrate complexes; triisopropyl phosphoramidato; infrared spectra; visible eleclzonic spectra; electrical conductance.