Group 4 Metal Complexes of Nitrogen-Bridged Dialkoxide Ligands: Synthesis, Structure, and Polymerization Activity Studies

Autor:	Loïc Toupet, Jean-François Carpentier, Christian W. Lehmann, Laurent Lavanant
Rok vydání:	2005
Předmět:	Zirconium Stereochemistry Organic Chemistry chemistry.chemical_element Metathesis Toluene Inorganic Chemistry Metal chemistry.chemical_compound Elimination reaction Crystallography Monomer chemistry Polymerization visual_art Alkoxide visual_art.visual_art_medium Physical and Theoretical Chemistry
Zdroj:	Organometallics. 24:5620-5633
ISSN:	1520-6041 0276-7333
DOI:	10.1021/om0505817
Popis:	Neutral soluble titanium(IV) and zirconium(IV) complexes of new amino-dialkoxide ligands {OCR2CH2N(CH2Ph)CH2CR2O}2- ({ONOR}2-) have been prepared. Alcohol and alkane elimination reactions from {ONOR}H2 (R = Me, 1; p-tol, 2) and salt metathesis routes from Li2{ONOMe} in situ-generated afford {ONOMe}Ti(OiPr)2 (3), {ONOR}2M (R = Me, M = Ti, 5; Zr, 6; R = p-tol, M = Zr, 7), {ONOMe}Zr(CH2Ph)2 (8), {ONOMe}ZrCl2(THF)n (n = 0, 9; n = 1, 10), {ONOMe}Zr(NMe2)2 (11), and {ONOR}TiCl2 (R = Me, 13; R = p-tol, 14) in good yields. X-ray crystallographic studies showed that 3, 8, 13, and 14 adopt in the solid state mononuclear structures, with coordination of the nitrogen atom to the metal center. Dinuclear structures with bridging alkoxide and amido ligands were observed for 6 and a mixed amido-{ONOMe}Zr complex (12) isolated in the preparation of 11. NMR data are consistent with the existence of a single monomeric species in toluene solution for all complexes, except 11 and dichlorozirconium complexes 9 and 10, for whic...
Databáze:	OpenAIRE
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