Ấn phẩm:
Cyclometalated platinum(II) complexes bearing eugenol as effective catalysts for hydrosilylation of phenylacetylene by triethoxysilane
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The catalytic activities of platinacyclic complexes bearing eugenol (EugH) including [Pt(μ-Cl)(Eug)] 2 (1) and [PtCl(Eug)(amine)] (2–4) [amine: pyridine/2, 4-methylpyridine/3, quinoline/4] for hydrosilylation of phenylacetylene by triethoxysilane were studied for the first time. The results showed that complexes 1–4 exhibited good catalytic abilities. With loading 0.5 mol% each of catalysts 1–4 at 70 oC without solvents and any other additives in air for 2 hours, triethoxysilane was completely converted to (E)-triethoxy(styryl)silane) (β(E) – the major product) and (triethoxy(1 -phenylvinyl)silane) (α – the minor product) with the α/β(E) molar ratio ranging from 1:2.6 to 1:2.8. Under the same reaction conditions with loading 0.1 mol% each of catalysts 2–4, the conversion of triethoxysilane was slightly reduced with an efficiency of 97–99 % and a molar ratio α/β(E) of 1:2.6 indicating the important role of Pt-(C=Calkene) in 1–4 for their catalytic activity. Furthermore, the verification of structures of complexes 2–4 by 13C NMR spectroscopy indicated that in chloroform-d1, complex 3 formed two distinct structural forms due to strong intermolecular interactions between the chloroform solvent and the complex, including a Cl3C-H...ClPt(II) hydrogen bond and a Cl2HC-Cl...Pt(II) halogen bond.
Mô tả
Vietnam Journal of Science and Technology, Vol. 63, No. 3
Tác giả
Pham, Van Thong
Dinh, Ngoc Doan Trang
Truong, Thuy Hang
Nguyen, Thi Thanh Chi
Người hướng dẫn
Nơi xuất bản
Nhà xuất bản
Viện Kỹ thuật Nhiệt đới, Viện Hàn lâm Khoa học và Công nghệ Việt Nam
Năm xuất bản
2025-06
ISSN tạp chí
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Từ khóa chủ đề
Platinum complexes , Eugenol , Hydrosilylation , Hydrogen and halogen bonds
URI
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Pham Van Thong, Dinh Ngoc Doan Trang, Truong Thuy Hang, Nguyen Thi Thanh Chi.pdf
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