Synthesis,Structure and Magnetism of Bis[1,2,4‐tris(trimethylsilyl)cyclopentadienyl]europium |
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| Authors: | Maurits H. Kuiper Heiko Lueken Prof. Dr. |
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| Affiliation: | 1. Aachen/Germany, Institute of Inorganic Chemistry, RWTH Aachen University;2. Aachen/Germany, Institute of Inorganic Chemistry, RWTH Aachen UniversityInstitut für Anorganische Chemie der RWTH Aachen, Landoltweg 1, D‐52074 Aachen, Fax: (+)49 241 80‐92642 |
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| Abstract: | ![]()
Bis[tris(trimethylsilyl)cyclopentadienyl]europium, Eu{C5H2[Si(CH3)3]3}2 (1) , has been synthesized by a modified transmetallation route between Tl{C5H2[Si(CH3)3]3} and europium powder in toluene. 1 crystallizes in the monoclinic space group C2/c (No. 15) with a = 20.293(5) Å, b = 20.221(5) Å, c = 9.654(2) Å, β = 106.412(5)°, V = 3800.1(15) Å3, Z = 4. The unit cell contains monomeric molecules that adopt a bent metallocene conformation with two partially staggered Cp? ligands. Magnetic susceptibility measurements in the temperature range 2–300 K display ideal Curie paramagnetic behaviour of the 4f7 system with Curie constant C = 9.6 × 10?5 m3 K mol?1 corresponding to temperature independent μeff = 7.8. |
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| Keywords: | Lanthanides Europocene Redox transmetallation Thallium Paramagnetism |
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