A Schrock-Type Germylene Complex: (η<sup>5</sup>‑C<sub>5</sub>H<sub>4</sub>Et)<sub>2</sub>(PMe<sub>3</sub>)HfGe(SiMe<sup>t</sup>Bu<sub>2</sub>)<sub>2</sub>
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The stable group 4 metal germylene complex (η5-C5H4Et)2(PMe3)HfGe(SiMetBu2)2 (2) is readily available by the reaction of the 1,1-dilithiogermane (tBu2MeSi)2GeLi2 with (η5-C5H4Et)2HfCl2 in toluene at −50 °C, followed by treatment with trimethylphosphine. The hafnium–germanium bond distance of 2.6705(5) Å in 2 is indicative of its double-bond character, being ca. 3–7% shorter than the usual Hf–Ge single bonds. The novel hafnium germylene derivative is classified as a Schrock-type complex, featuring a negatively polarized nucleophilic germanium center.
创建时间：
2016-02-13
