¹³C_carbene nuclear magnetic resonance chemical shift analysis confirms Ce^IV[double bond, length as m-dash]C double bonding in cerium(iv)-diphosphonioalkylidene complexes.

ABSTRACT: Diphosphonioalkylidene dianions have emerged as highly effective ligands for lanthanide and actinide ions, and the resulting formal metal-carbon double bonds have challenged and developed conventional thinking about f-element bond multiplicity and covalency. However, f-element-diphosphonioalkylidene complexes can be represented by several resonance forms that render their metal-carbon double bond status unclear. Here, we report an experimentally-validated ¹³C Nuclear Magnetic Resonance computational assessment of two cerium(iv)-diphosphonioalkylidene complexes, [Ce(BIPM^TMS)(ODipp)₂] (1, BIPM^TMS = {C(PPh₂NSiMe₃)₂}^2-; Dipp = 2,6-diisopropylphenyl) and [Ce(BIPM^TMS)₂] (2). Decomposing

SUBMITTER: Baker CF 

PROVIDER: S-EPMC10732143 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature