Synthesis of Terminal Uranium(IV) Disulfido and Diselenido Compounds by Activation of Elemental Sulfur and Selenium

Abstract

Rare stakes: Terminal uranium(IV) disulfido and diselenido compounds, Tp*2U(E2) (E=S, Se), were synthesized by the activation of elemental chalcogens. Structural, spectroscopic, computational and magnetic studies of these species establish their tetravalency and highly polarized U-E bonds.

Reactivity of uranium(iv) bridged chalcogenido complexes UIV–E–UIV(E = S, Se) with elemental sulfur and selenium: synthesis of polychalcogenido-bridged uranium complexes

“…(Table 2). These bond distances are at the shorter end of known S-S bond lengths observed in other uranium 1,19,50,[57][58][59][60][61] and transition metal complexes, [62][63][64][65][66] featuring the persuldo ligand S 2…”

“…14,19,37,43 The Se1-Se2 bond distance of 2.377(1)Å is comparable to the respective bond lengths in transition metal 32,33,44,45 and lanthanide complexes 32,[46][47][48][49] as well as uranium perselenide complexes (2.293(2)Å-2.401(4)Å). 39,50 Additionally, the U(IV)-Se 2…”

Actinide‐Mediated Catalytic Addition of EH Bonds (E=N, P, S) to Carbodiimides, Isocyanates, and Isothiocyanates

“…[10] In addition to hydroelementation reactions, lanthanide complexes have been applied as catalysts for the addition of EÀHb onds (E = N, P) to carbodiimides,i socyanates,a nd isothiocyanates,y ielding the respective guanidine, phosphaguanidine,a nd thiourea derivatives,r espectively, [11] which have found wide application as ligands for coordination compounds, [12] in the field of medicinal [13] and materials chemistry, [14] as well as synthons in organic chemistry. [16] Similarly,t he synthesis of actinide complexes with various phosphido, [17] sulfido [18] and dithiolene [19] ligands was reported, and the reactivity of selected examples toward stoichiometric amounts of carbon dioxide and carbon disulfide was studied. [16] Similarly,t he synthesis of actinide complexes with various phosphido, [17] sulfido [18] and dithiolene [19] ligands was reported, and the reactivity of selected examples toward stoichiometric amounts of carbon dioxide and carbon disulfide was studied.…”

Synthesis and characterization of hydrotris(3-phenylpyrazolyl)borate ligands on low-valent uranium

“…[19] In previous work from our group, we have demonstrated the utility of the Tp* ligand to support low-valent uranium. [18,[20][21][22][23][24][25][26][27][28][29][30][31] However, the steric protection of this ligand is limited due to the small size of the methyl groups.…”