Studies on organolanthanide complexes—XLV. The formation and X-ray crystal structure of bis(2-methoxyethylcyclopentadienyl)erbium hydroxide

The partial hydrolysis of CP′2ErCl (1) (Cp′ = CH3OCH2Ch2C5H4) affords [CP′2Er(μ-OH)]2, the single crystal X-ray structure of which reveals that the complex is dimeric with bridging hydroxide groups. The molecular structure shows the hydroxyl groups bridging with distances ErO = 2.258(5), 2.216(5) A, and the methoxyethyl group coordinating with distances ErO(1) = 2.542(3), ErCp1 = 2.3981(4) and ErCp2 = 2.1680(3) A. The bond angles of OErO* and OErO(1) in 2 are 71.6(2) and 73.2 (2)°, respectively.