Thiocyanate complexes of the lanthanides, Am and Cm

Abstract

The trivalent actinide thiocyanate complexes of Am and Cm are synthesized for the first time along with their lanthanide homologues allowing comparison of the lanthanide and actinide bonding.

η3‐Coordination and Functionalization of the 2‐Phosphaethynthiolate Anion at Lanthanum(III)**

“…[18] Besides aminor shift of the PN ligand singlet resonance in the 31 P{ 1 H} NMR spectrum (C 6 D 6 )from d = 9.9 ppm for 1-I to d = 10.1 ppm for 3 and an ew broad singlet resonance at d = 142.6 ppm in the 13 C{ 1 H} NMR spectrum, adominant absorption band in the IR spectrum at n = 2008 cm À1 indicated the coordination of thiocyanate. [19] Similarly,t he coordination of the azide anion in complex 4 was inferred from ashift of the PN ligand resonance in the 31 P{ 1 H} NMR spectrum (C 6 D 6 )to d = 5.1 ppm and as trong IR absorption band at n = 2113 cm À1 . [20] X-ray quality crystals of complex 2 could be grown by slow evaporation of ac oncentrated toluene solution at room temperature (Figure 1).…”

Unprecedented η3-Coordination and Functionalization of the 2-Phosphaethynthiolate Anion at Lanthanum(III)

“…[18] Besides a minor shift of the PN ligand singlet resonance in the 31 P{ 1 H} NMR spectrum (C6D6) from δ = 9.9 ppm for 1-I to δ = 10.1 ppm for 3 as well as a new broad singlet resonance at δ = 142.6 ppm in the 13 C{ 1 H} NMR spectrum, a dominant absorption band in the IR spectrum at ν = 2008 cm -1 most clearly indicated the successful coordination of thiocyanate. [19] Similarly, the successful coordination of the azide anion in complex 4 was inferred from a shift of the PN ligand resonance in the 31 P{ 1 H} NMR spectrum (C6D6) to δ = 5.1 ppm and a strong IR absorption band at ν = 2113 cm -1 . [20] X-ray quality crystals of complex 2 could be grown by slow evaporation of a concentrated toluene solution at room temperature ( Figure 1).…”

Advancing understanding of actinide(iii) (Ac, Am, Cm) aqueous complexation chemistry

“…These acetate structures constitute rare examples of minor actinides characterized by single crystal X-ray diffraction. [27][28][29][30]…”