Facile Construction of Yttrium Pentasulfides from Yttrium Alkyl Precursors: Synthesis, Mechanism, and Reactivity.

Author(s) Zhang, F.; Zhang, J.; Zhou, X.
Journal Inorg Chem
Date Published 2017 Feb 20
Abstract

Treatment of the yttrium dialkyl complex Tp(Me2)Y(CH2Ph)2(THF) (Tp(Me2) = tri(3,5 dimethylpyrazolyl)borate, THF = tetrahydrofuran) with S8 in a 1:1 molar ratio in THF at room temperature afforded a yttrium pentasulfide Tp(Me2)Y(κ4-S5) (THF) (1) in 93% yield. The yttrium monoalkyl complex Tp(Me2)CpYCH2Ph(THF) reacted with S8 in a 1:0.5 molar ratio under the same conditions to give another yttrium pentasulfide [(Tp(Me2))2Y](+)[Cp2Y(κ4-S5)](-) (10) in low yield. Further investigations indicated that the S5(2-) anion facilely turned into the corresponding thioethers or organic disulfides, and released the redundant S8, when it reacted with some electrophilic reagents. The mechanism for the formation of the S5(2-) ligand has been investigated by the controlling of the reaction stoichiometric ratios and the stepwise reactions.

DOI 10.1021/acs.inorgchem.6b02747
ISSN 1520-510X
Citation Inorg Chem. 2017;56(4):20702077.

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