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Lithium, Tin(II), and Zinc Amino-Boryloxy Complexes: Synthesis and Characterization.

ABSTRACT: Analogous to the ubiquitous alkoxide ligand, metal boroxide and boryloxy complexes are an underexplored class of hard anionic O^- ligand. A new series of amine-stabilized Li, Sn(II), and Zn boryloxy complexes, comprising electron-rich tetrahedral boron centers have been synthesized and characterized. All complexes have been characterized by one-dimensional (1D), two-dimensional (2D), and DOSY NMR, which are consistent with the solid-state structures unambiguously determined via single-crystal X-ray diffraction. Electron-rich μ²- (Sn and Zn) and μ³- (Li) boryloxy binding modes are observed. Compounds 6-9 are the first complexes of this class, with the chelating bis- and tris-phenol ligands providing a scaffold that can be easily functionalized and provides access to the boronic acid pro-ligand, hence allowing facile direct synthesis of the resulting compounds. Computational quantum chemical studies suggest a significant enhancement of the π-donor ability of the amine-stabilized boryloxy ligand because of electron donation from the amine functionality into the p-orbital of the boron atom.

SUBMITTER: Straiton AJ

PROVIDER: S-EPMC9930121 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature

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Lithium, Tin(II), and Zinc Amino-Boryloxy Complexes: Synthesis and Characterization.

Straiton Andrew J AJ McMullin Claire L CL Kociok-Köhn Gabriele G Lyall Catherine L CL Parish James D JD Johnson Andrew L AL

Inorganic chemistry 20230128 6

Analogous to the ubiquitous alkoxide ligand, metal boroxide and boryloxy complexes are an underexplored class of hard anionic O<sup>-</sup> ligand. A new series of amine-stabilized Li, Sn(II), and Zn boryloxy complexes, comprising electron-rich tetrahedral boron centers have been synthesized and characterized. All complexes have been characterized by one-dimensional (1D), two-dimensional (2D), and DOSY NMR, which are consistent with the solid-state structures unambiguously determined via single- ...[more]

PMID: 36708353

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Dataset Information

Lithium, Tin(II), and Zinc Amino-Boryloxy Complexes: Synthesis and Characterization.

Publications

Lithium, Tin(II), and Zinc Amino-Boryloxy Complexes: Synthesis and Characterization.

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