Tri(cyclopentadienyl)americium(III)

Abstract

inclined towards [loo] at 138 + 5 ' . The calculation shows a very small deviation from the plane (010) (about 5 O in the direction [OlO]) and an inclination towards [loo] of 140 3~ 5 '.With ro = 0.98 A, (XYZ)H = 0.75, 0.18, 0.61. Results for a-KNH2 agree with the assumptions of Juza and collaborators 191. It thus appears that a direct relation exists for crystalline hydroxo compounds between the course of the electrostatic equipotential lines near the proton-carrying particles and the positions of the protons, by means of which the latter can be estimated. Moreover the occurrence of bent hydrogen bonds can be traced to the interaction of the protons with their lattice neighbors, and the angle O-H...O can be calculated quite accurately.Received: November 18th, 1965 [Z 110/943 IE] German version: Angew. Chem. 78, 113 (1966) KzMn3S4

The Energy Gap of the Lowest Manifolds in Americium Triscyclopentadienide

“…Synthesis and chemical properties 243 Am(III) triscyclopentadienide was prepared using the procedure described by BAUMGÄRTNER et al [3] for the synthesis of the 241 3 do not exhibit any difference in sensitivity to air and oxygen or in their decomposition by water or dilute acid, which is accompanied by gas evolution and the formation of pink Am 3+ solutions.…”

“…2 mark the averaged molar susceptibility directly determined on powder samples with masses from 80 to 100 mg at a given temperature and corrected only for diamagnetic contribution [18] of the ligands and of the central ion(x diam for Am(C s Hs) 3 : 235 · 10" 6 e. m. u. / mole).…”

“…These difficulties were greatly reduced in this study by using long-lived 243 Am [8] (r 1/2 = 7700 y) and below is reported an investigation of the spectroscopic, magnetic and crystallographic properties of freshly prepared 243 Am(C 5 H s ) 3 .…”

“…Previous investigations of the magnetic behaviour of Am 3+ [1 ], in particular the temperature dependence of the magnetic susceptibility of 241 Am(C s H 5 ) 3 [2], which was first prepared by BAUMGÄRTNER et al [3], have shown a marked discrepancy with spectroscopic studies [4 -7].…”

Americium

“…Dropwise addition of aqueous Am 3þ (pH 4.5) to warm, slightly less than stoichiometric amounts of ammonium benzoylacetone yields pale-rose Am(C 10 H 6 F 3 O 2 ) 3 · 3H 2 O. Both compounds decompose in air at [1] (Asprey et al, , 1951(Asprey et al, , 1954b; [2] (Keller and Schreck, 1969); [3] (Karraker, 1975(Karraker, , 1977; [4] (Baumgärtner et al, 1966a(Baumgärtner et al, , 1977Kanellakopoulos et al, 1970Kanellakopoulos et al, , 1978Seaborg, 1972); [5] (Danford et al, 1970;Moore, 1970;Sakanoue and Amano, 1975); [6] (Lebedev et al, 1960b(Lebedev et al, , 1962); [7] (Burns and Danford, 1969;Danford et al, 1970;Bagnall, 1972;Sakanoue and Amano, 1975); [8] (Davydov et al, 1975); [9] (Keller et al, 1965a(Keller et al, , 1966; [10] (Eyring et al, 1952;Yakovlev and Kosyakov, 1958b;Lebedev et al, 1960a;Weigel et al, 1966;…”