کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10244833 47706 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phosphine-bound zinc halide complexes for the coupling reaction of ethylene oxide and carbon dioxide
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Phosphine-bound zinc halide complexes for the coupling reaction of ethylene oxide and carbon dioxide
چکیده انگلیسی
Phosphine adducts of zinc(II) halides, ZnX2L2 (X = Cl, Br, I; L = PMe2Ph, PEt3, PBu3, PPh3, PCy3), prepared by the reaction of ZnX2 with two equivalents of corresponding phosphines, showed high activities for the coupling reaction of CO2 and ethylene oxide to produce ethylene carbonate. The catalytic activity of ZnX2L2 was hardly affected by the nucleophilicity of the phosphine ligands, with the exception of ZnX2(PCy3)2, but depended strongly on the nature of halide ligands. An active species containing ethoxyphosphonium ligands, Zn3Br6[μ-OCH2CH2-P(C6H5)3]3, was isolated and characterized by X-ray crystallography, elemental analysis, and NMR spectroscopy. The mechanistic pathway for the formation of active species and cyclic carbonates is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 232, Issue 1, 15 May 2005, Pages 80-84
نویسندگان
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