کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1325943 977411 2006 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, reactivity and crystal structures of platinum (II) and platinum (IV) cyclometallated compounds derived from 2- and 4-biphenylimines
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Synthesis, reactivity and crystal structures of platinum (II) and platinum (IV) cyclometallated compounds derived from 2- and 4-biphenylimines
چکیده انگلیسی

The reaction of [Pt2Me4(μ-SMe2)2] with ligands 4-C6H5C6H4CHNCH2CH2NMe2 (1a) and 2-C6H5C6H4CHNCH2CH2NMe2 (1b) carried out in acetone at room temperature produced compounds [PtMe2{4-C6H5C6H4CHNCH2CH2NMe2}] (2a) and [PtMe2{2-C6H5C6H4CHNCH2CH2NMe2}] (2b), respectively, in which the imines act as bidentate [N,N′] ligands. Cyclometallated [C,N,N′] compounds [PtMe{4-C6H5C6H3CHNCH2CH2NMe2}] (3a) and [PtMe{2-C6H5C6H3CHNCH2CH2NMe2}] (3b), were obtained by refluxing toluene solutions of compounds 2a or 2b. Reaction of [Pt2Me4(μ-SMe2)2] with ligands 4-C6H5C6H4CHNCH2Ph (1c) and 2-C6H5C6H4CHNCH2Ph (1d) produced compounds [PtMe{4-C6H5C6H3CHNCH2Ph}SMe2] (5c) and [PtMe{2-C6H5C6H3CHNCH2Ph}SMe2] (5d) containing a [C,N] ligand, from which triphenylphosphine derivatives 6c and 6d were also prepared. In all cases, metallation took place to yield five-membered endo-metallacycles and formation of seven-membered or of exo-metallacycles was not observed. The reactions of 3a, 3b, 6c and 6d with methyl iodide were studied in acetone and gave the corresponding cyclometallated platinum (IV) compounds. All compounds were characterised by NMR spectroscopy and compounds 3b, 4a, 6c and 6d were also characterised crystallographically.

New [C,N,N′] and [C,N] cyclometallated platinum (II) compounds derived from 2- and 4-biphenylimines are reported along with their reactions with PPh3 and methyl iodide. The relative position of the two phenyl rings can be related to the steric crowding in the coordination sphere of these compounds.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Organometallic Chemistry - Volume 691, Issue 3, 15 January 2006, Pages 444–454
نویسندگان
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