Rare‐Earth Cyclobutadienyl Sandwich Complexes: Synthesis, Structure and Dynamic Magnetic Properties
作者： Benjamin M. Day , Fu-Sheng Guo , Sean R. Giblin , Akira Sekiguchi , Akseli Mansikkamäki
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摘要: The potassium cyclobutadienyl [K2{η4‐C4(SiMe3)4}] (1) reacts with MCl3(THF)3.5 (M = Y, Dy) to give the first rare‐earth complexes, i.e. complex anions [M{η4‐C4(SiMe3)4}{η4‐C4(SiMe3)3‐κ‐(CH2SiMe2}]2–, (2M), as their dipotassium salts. tuck‐in alkyl ligand in 2M is thought form through deprotonation of sandwich complexes [M{η4‐C4(SiMe3)4}2]– by 1. Complex 2Dy a single‐molecule magnet, but prominent quantum tunnelling. An anisotropy barrier 323(22) cm–1 was determined for an applied field 1 kOe, and S‐shaped magnetic hysteresis loops were observed up 7 K.
sci-hub.se 参考文章(44)
Masayoshi Nishiura, Fang Guo, Zhaomin Hou, Half-sandwich rare-earth-catalyzed olefin polymerization, carbometalation, and hydroarylation. Accounts of Chemical Research. ,vol. 48, pp. 2209- 2220 ,(2015) , 10.1021/ACS.ACCOUNTS.5B00219
David M. Anderson, F. Geoffrey N. Cloke, P. Anthony Cox, Norman Edelstein, Jennifer C. Green, Tanya Pang, Ausama A. Sameh, George Shalimoff, On the stability and bonding in bis(η-arene)ianthanide complexes Journal of The Chemical Society, Chemical Communications. pp. 53- 55 ,(1989) , 10.1039/C39890000053
Jennifer J. Le Roy, Liviu Ungur, Ilia Korobkov, Liviu F. Chibotaru, Muralee Murugesu, Coupling strategies to enhance single-molecule magnet properties of erbium-cyclooctatetraenyl complexes. Journal of the American Chemical Society. ,vol. 136, pp. 8003- 8010 ,(2014) , 10.1021/JA5022552
Matthew R. MacDonald, Jefferson E. Bates, Joseph W. Ziller, Filipp Furche, William J. Evans, Completing the Series of +2 Ions for the Lanthanide Elements: Synthesis of Molecular Complexes of Pr2+, Gd2+, Tb2+, and Lu2+ Journal of the American Chemical Society. ,vol. 135, pp. 9857- 9868 ,(2013) , 10.1021/JA403753J
Wenliang Huang, Paula L. Diaconescu, P4 activation by group 3 metal arene complexes Chemical Communications. ,vol. 48, pp. 2216- 2218 ,(2012) , 10.1039/C2CC17638F
Akira Sekiguchi, Tsukasa Matsuo, Hidetoshi Watanabe, Synthesis and Characterization of a Cyclobutadiene Dianion Dilithium Salt: Evidence for Aromaticity Journal of the American Chemical Society. ,vol. 122, pp. 5652- 5653 ,(2000) , 10.1021/JA0004175
Sergey N. Konchenko, Nikolay A. Pushkarevsky, Michael T. Gamer, Ralf Köppe, Hansgeorg Schnöckel, Peter W. Roesky, [{(η5-C5Me5)2Sm}4P8]: A Molecular Polyphosphide of the Rare-Earth Elements Journal of the American Chemical Society. ,vol. 131, pp. 5740- 5741 ,(2009) , 10.1021/JA901045M
Grégory Nocton, Wayne W. Lukens, Corwin H. Booth, Sergio S. Rozenel, Scott A. Medling, Laurent Maron, Richard A. Andersen, Reversible Sigma C-C Bond Formation Between Phenanthroline Ligands Activated by (C5Me5)2Yb Journal of the American Chemical Society. ,vol. 136, pp. 8626- 8641 ,(2014) , 10.1021/JA502271Q
Marc D. Walter, Corwin H. Booth, Wayne W. Lukens, Richard A. Andersen, Cerocene Revisited: The Electronic Structure of and Interconversion Between Ce2(C8H8)3 and Ce(C8H8)2 Organometallics. ,vol. 28, pp. 698- 707 ,(2009) , 10.1021/OM7012327
Wenliang Huang, Florian Dulong, Tianpin Wu, Saeed I. Khan, Jeffrey T. Miller, Thibault Cantat, Paula L. Diaconescu, A six-carbon 10π-electron aromatic system supported by group 3 metals Nature Communications. ,vol. 4, pp. 1448- ,(2013) , 10.1038/NCOMMS2473