C. S. Tredget, S. Lawrence, Benjamin D. Ward
May 20, 2005
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Influential Citations
49
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Organometallics
Abstract
The first group 3 organometallic compounds containing the tris(3,5-dimethylpyrazolyl)methane (HC(Me2pz)3) and 1,3,5-trimethyltriazacyclohexane (Me3[6]aneN3) ligands are reported, together with the homologous 1,4,7-triazacyclononane-supported compounds and trichloride derivatives for many of the ligands. Reaction of M(CH2SiMe3)3(THF)2 (M = Sc, Y) with Me3[9]aneN3 (1,4,7-trimethyltriazacyclononane), HC(Me2pz)3, or Me3[6]aneN3 gave the corresponding tris((trimethylsilyl)methyl) derivatives M(Me3[9]aneN3)(CH2SiMe3)3 (M = Sc (1), Y (2)), M{HC(Me2pz)3}(CH2SiMe3)3 (M = Sc (3), Y (4)), and M(Me3[6]aneN3)(CH2SiMe3)3 (M = Sc (12), Y (13)). Reaction of 3 with 2,6-dimethylphenol (ArOH) gave the tris(aryloxide) derivative Sc{HC(Me2pz)3}(OAr)3 (9), and reaction of HC(Me2pz)3 with MCl3 gave M{HC(Me2pz)3}Cl3 (M = Sc (5), Y(6)). Attempts to prepare tris((trimethylsilyl)methyl) complexes with the more sterically demanding tris(3-R-pyrazolyl)methanes (R = iPr, Ph, tBu) or the related tris(pyrazolyl)methylsilane ligand were ...