Exploitation of a Very Strongly σ‐Donating Sn^II Ligand: Synthesis of a Homoleptic, Octahedral Ni^IV Complex

Abstract

Encased in stannaborates: The synthesis of the homoleptic, octahedral MIV complexes [M(SnB11H11)6]8− (M= Ni, Pd, Pt) has been reported. Spectroscopic data, together with the square‐planar structure obtained for the corresponding tetrakis‐ligated NiII complex [Ni(SnB11H11)4]6−, provide ample evidence for the extremely strong σ‐donor properties of the [SnB11H11]2− ligand.

O–O Bond activation in H2O2 and (CH3)3C-OOH mediated by [Ni(cyclam)(CH3CN)2](ClO4)2: Different mechanisms to form the same Ni(iii) product?

“…1,3-6 Moreover, a few examples of relatively stable Ni(IV) complexes are described in the literature, most of them containing strong negatively charged s-donor chelating ligands. [7][8][9][10][11][12] The interest in this topic has increased since the characterization of several nickel-containing enzymes that catalyze redox processes. 13 Thus, unraveling the factors that can modulate the redox reactivity of nickel centers, and specifically the pathways related to activation of O-O bonds, would probably allow a better understanding of the biological systems.…”

Orbital energy mismatch engenders high-spin ground states in heterobimetallic complexes

“…This contrasts with previous studies of Sn ligands, which characterize it as a relatively strong s-donor. [33][34][35][36] This discrepancy prompted us to investigate the degree of Sn character in the 3d-based MOs.…”