کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1325543 1499940 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
C–H bond activation of N-heterocyclic carbene IMes by rare-earth metal alkyl complexes
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
C–H bond activation of N-heterocyclic carbene IMes by rare-earth metal alkyl complexes
چکیده انگلیسی

Excess N-heterocyclic carbene 1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene (IMes) reacted with the tris(trimethylsilylmethyl) rare-earth metal complex [Ln(CH2SiMe3)3(THF)2] (Ln = Y, Lu) in toluene to give a C2-symmetric mono(trimethylsilylmethyl) complex with two IMes’ ligands [Ln(CH2SiMe3)(IMes’)2] (IMes’ = IMes deprotonated at the ortho-methyl group of the mesityl substituent), formed by C–H bond activation of the mesityl substituents’ ortho-methyl groups. With one equivalent of IMes in THF, a mono-activated product [Ln(CH2SiMe3)2(IMes’)(THF)n] is selectively formed. The molecular structure of the lutetium compound [Lu(CH2SiMe3)2(IMes’)(THF)] in the crystal shows a strongly distorted trigonal bipyramid with a strained chelate ligand IMes’.

The N-heterocyclic carbene bis(2,4,6-trimethylphenyl)imidazol-2-ylidene (IMes) reacted with tris(trimethylsilylmethyl) complex [Lu(CH2SiMe3)3(THF)2] to give a C2-symmetric mono(trimethylsilylmethyl) complex [Lu(CH2SiMe3)(IMes’)2] as well as a mono-activated product [Ln(CH2SiMe3)2(IMes’)(THF)n].Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Organometallic Chemistry - Volume 695, Issues 25–26, 1–15 December 2010, Pages 2794–2797
نویسندگان
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