Comparison of Ce(iv)/Th(iv)-alkynyl complexes and observation of a <i>trans</i>-influence ligand series for Ce(iv).

ABSTRACT: Organometallic cerium(iv) complexes have been challenging to isolate and characterize due to the strongly oxidizing nature of the cerium(iv) cation. Herein, we report two cerium(iv) alkynyl complexes, [Ce(TriNOx)(C[triple bond, length as m-dash]C-SiMe₃)] (1-Ce^TMS) and [Ce(TriNOx)(C[triple bond, length as m-dash]C-Ph)] (1-Ce^Ph) (TriNOx^3- = tris(2-tert-butylhydroxylaminato)benzylamine), that include terminal alkyne moieties. The isostructural thorium analogue [Th(TriNOx)(C[triple bond, length as m-dash]C-SiMe₃)] (1-Th^TMS) was also synthesized and compared with 1-Ce^TMS in bond distance, ¹³C-NMR spectra, vibrational spectra and electronic structure. The Ce-C bond distances were 2.501(3) Å for

SUBMITTER: Yang Q 

PROVIDER: S-EPMC12379718 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature