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Media type:
E-Article
Title:
Titan- und zirkoniumorganische Verbindungen mit einfachen Phosphor-yliden / Titanium- and Zirconiumorganic Compounds of Simple Phosphorus Ylides
Description:
TiCl4 and ZrCl4 were found to form a series of adducts with trimethyl(methylene)phosphorane, none of which is soluble in common inert solvents. With dimethylaminotitanium chlorides, a dinuclear ylide 10 was obtained, containing a dititanacyclobutane ring system, in which the metal atoms are bridged by [xxx] groups. cp2TiCl2 and cp2ZrCl2 also form ylide adducts with (CH3)3P=CH2 in the ratio 1:2. The lithiated ylide converts both cp2TiCl2 and cp2TiCl into the cyclic ylide complex (C5H5)2Ti(CH2)2P(CH3)2 (13). With lithiated (CH3)3P=N–P(CH3)2=CH2, the related nitrido-bis-dimethylphosphoniummethylide derivative (15) could be isolated. 13 and 15 were characterized, inter alia by their ESR and mass spectra.