Preparation and Catalytic Performance of Novel Dimeric Tetranuclear Zinc Complexes in Hydroamination of Alkenes at Room Temperature

Abstract

The synthesis of two novel dimeric tetranuclear zinc complexes has been described. The application of these complexes in hydroamination of unactivated alkenes showed at room temperature high catalytic activity.

alkenes - heterocycles - hydroamination - tetranuclear - zinc

References and Notes

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Single-Crystal X-ray Diffraction Data of Compound 4
C₃₄H₅₂Br₄N₄O₂Zn₄˙0.5 (toluene) (1175.98): Stoe IPDS 2T, space group C2/c (No. 15) with a = 29.1063 (12) Å, b = 17.2017 (7) Å, c = 22.2739 (9) Å, β = 126.790 (2)˚ at 200 K, Z = 8, V = 8931.0(6) Å^³, ρ = 1.749 g cm^-³, 2θ _max = 50˚, 7865 reflections collected, 6354 unique reflections (R _int = 0.0860). The structure was solved by Patterson methods (SHELXS-97 and SHELXL-97) and refined by full-matrix least-square techniques with I > 2σ(I) to R ₁ = 0.0483 and wR ₂ = 0.1190.
Single-Crystal X-ray Diffraction Data of Compound 9
C₃₄H₅₆N₄O₂Zn₄ (814.31): Oxford Diffraction Xcalibur S Sapphire, space group P6₁ (No. 169) with a = 11.21070 (10) Å, c = 50.8375 (12) Å, at 150 K, Z = 6, V = 5533.25 (15) Å^³, ρ = 1.466 g cm^-³, 2θ _max = 50˚, 41505 reflections collected, 6515 unique reflections (R _int = 0.0898). The structure was solved by Patterson methods (SHELXS-97 and SHELXL-97) and refined by full-matrix least-square techniques with I > 2σ(I) to R ₁ = 0.0605 and wR ₂ = 0.0812.
Positional parameters, hydrogen-atom parameters, thermal parameters, bond lengths and angles have been deposited as Supporting Information; CCDC-689633 (4) and 689634 (9).

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