| Abstract
| - New monocyclopentadienyl complexes of tantalum(V)-bearing assisted dithiolate ligands are described along with their reactivity with xylylisocyanide.
- Cp*TaCl4 reacts with X(CH2CH2SH)2 in the presence of NEt3 to yield the correspondingthiolate complexes Cp*TaCl2(SCH2CH2)2X (X = O (1), S (2)). The crystal structure of complex2 has been determined by X-ray diffraction. The tantalum methyl complex Cp*TaMe4 reactswith X(CH2CH2SH)2, rendering Cp*TaMe2(SCH2CH2)2X (X = O (3), S (4)). They have bothbeen characterized by X-ray diffraction methods. Complex 3 reacts with xylylisocyanide toyield the imine complex Cp*Ta(η2-xylylNCMe2)(SCH2CH2)2O (6), which undergoes insertionof a second isocyanide molecule to yield an η1-iminoacyl-containing azatantalacyclobutanecompound Cp*Ta(xylylNC(Me)2CN(xylyl)(SCH2CH2)2O (5), whose structure has been alsodetermined by X-ray diffraction.
|
