Synthesis, Structural Analysis, and Catalysis for Suzuki–Miyaura Coupling Reactions of Tetradentate N^C^C^N and Tetracarbene C^C^C^C Nickel–N‐Heterocyclic Carbene Complexes DOI Open Access

Chuanqiu Gao,

Wen‐Qi Luo,

Xiao Xiao

и другие.

Applied Organometallic Chemistry, Год журнала: 2025, Номер 39(2)

Опубликована: Янв. 19, 2025

ABSTRACT Four novel Ni(II)– N ‐heterocyclic carbene (Ni–NHC) complexes were synthesized and characterized by NMR, ESI–MS, SEM, TEM, EDS mapping, XPS, single‐crystal X‐ray diffraction (XRD) analysis. Ni–NHC 7 8 are intramolecular tetradentate ^ C NHC N‐cyclometalated [1L + 1M] complex featuring coplanar of azole quinoline rings, 11 is an interligand tetracarbene ‐cyclometalated [2L with two six‐membered, conformation boat‐shaped, structural units. Complex 9@Ni–NHC a softly fluffy black powder the surface morphology tightly arranged honeycomb‐like pore structure may be containing very small amount Ni 0 state. DFT calculations suggested enhanced stability for . Cyclic voltammetry studies shown that , have similar redox properties pairs peaks, displays only one reversible process half‐wave potentials at E 1/2 = −0.864 V. All found to efficient catalysts Suzuki–Miyaura cross‐coupling reaction, display better catalytic activity than exhibit comparable Pd(OAc) 2 catalyst, which attributed intraligand chelating coordination conjugate effect between rings.

Язык: Английский

Synthesis, Structural Analysis, and Catalysis for Suzuki–Miyaura Coupling Reactions of Tetradentate N^C^C^N and Tetracarbene C^C^C^C Nickel–N‐Heterocyclic Carbene Complexes DOI Open Access

Chuanqiu Gao,

Wen‐Qi Luo,

Xiao Xiao

и другие.

Applied Organometallic Chemistry, Год журнала: 2025, Номер 39(2)

Опубликована: Янв. 19, 2025

ABSTRACT Four novel Ni(II)– N ‐heterocyclic carbene (Ni–NHC) complexes were synthesized and characterized by NMR, ESI–MS, SEM, TEM, EDS mapping, XPS, single‐crystal X‐ray diffraction (XRD) analysis. Ni–NHC 7 8 are intramolecular tetradentate ^ C NHC N‐cyclometalated [1L + 1M] complex featuring coplanar of azole quinoline rings, 11 is an interligand tetracarbene ‐cyclometalated [2L with two six‐membered, conformation boat‐shaped, structural units. Complex 9@Ni–NHC a softly fluffy black powder the surface morphology tightly arranged honeycomb‐like pore structure may be containing very small amount Ni 0 state. DFT calculations suggested enhanced stability for . Cyclic voltammetry studies shown that , have similar redox properties pairs peaks, displays only one reversible process half‐wave potentials at E 1/2 = −0.864 V. All found to efficient catalysts Suzuki–Miyaura cross‐coupling reaction, display better catalytic activity than exhibit comparable Pd(OAc) 2 catalyst, which attributed intraligand chelating coordination conjugate effect between rings.

Язык: Английский

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