کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1323244 | 977275 | 2008 | 13 صفحه PDF | دانلود رایگان |
A family of N,N donor ligands [1-(NHAr)-2-(PR2NAr′)C6H4] (1a–d; Ar = 2,6-iPr2-C6H3, R = Me, Ph, Ar′ = 2,4,6-Me3-C6H2, 2-iPr-C6H4, 2,6-iPr2-C6H3) has been prepared and fully characterized by multinuclear NMR spectroscopy and X-ray crystallography. Lithiation of the N–H unit and subsequent salt metathesis protocols with ScCl3THF3 provides an avenue to organometallic scandium complexes. The resultant base-free monomeric dichlorides LScCl2, 3a–d, have been fully characterized by NMR spectroscopy as well as X-ray crystallography (3a,c,d). Alkylation of the dichlorides using LiMe results in clean formation of dialkyl complexes LScMe24a–c. Thermolysis of these materials under argon and hydrogen leads to decomposition products as a result of C–H activation of the ligand. Analysis of these results provides a qualitative assessment of the metalative resistance of each ligand framework.
The synthesis of an anilido-phosphinimine ligand system is described, and used to prepare monomeric organometallic scandium derivatives. Thermolysis of the organoscandium complexes reveal metalation at a phosphorus substituent.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 693, Issue 5, 1 March 2008, Pages 834–846