Yttrium Polyphenylcyclopentadienyl Complexes with 1,3,5-Trimethyl-1,3,5-triazacyclohexane

Abstract

The reaction of di-, tri-, and tetraphenylcyclopentadienylpotassium with yttrium chloride tetrahydrofuranate in the presence of 1,3,5-trimethyl-1,3,5-triazacyclohexane (Me₃tach) gives complexes of the type [Cp'Y(Me₃tach)Cl₂] (Cp' = Ph₂C₅H₃ (Cp^Ph2) (I), Ph₃C₅H₂ (Cp^Ph3) (II), Ph₄C₅H (Cp^Ph4) (III). The molecular structure of complexes I–III was established by X-ray diffraction (CCDC nos. 2406644 (I), 2406645 (II), 2406646 (III)). The main structural parameters of all of the obtained monocyclopentadienyl complexes were similar, irrespective of the number of phenyl substituents in the cyclopentadienyl ligand. According to NMR spectroscopy data, compounds I and III retained their structure in THF solution.