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Synthesis, Structure, and 15N NMR Studies of Paramagnetic Lanthanide Complexes Obtained by Reduction of Dinitrogen

All Rights Reserved. Synthesis, Structure, and 15N NMR Studies of Paramagnetic Lanthanide Complexes Obtained by Reduction of Dinitrogen. Evans, William J.; Rego, Daniel B.; Ziller, Joseph W. (Department of Chemistry, University of California, Irvine, CA 92697-2025, USA). Inorganic Chemistry, 45(26), 10790-10798 (English) 2006 American Chemical Society. CODEN: INOCAJ. ISSN: 0020-1669. DOCUMENT TYPE: Journal CA Section: 29 (Organometallic and Organometalloidal Compounds) Section cross-reference(s): 75 The recently discovered LnZ3/M and LnZ2Z'/M methods of redn. (Ln = lanthanide; M = alkali metal; Z, Z' = monoanionic ligands that allow these combinations to generate LnZ2 reactivity) were applied to provide the 1st crystallog. characterized dinitrogen complexes of Ce, [(C5Me5)2(THF)Ce]2(m-h2:h2-N2) and [(C5Me4H)2(THF)Ce]2(m-h2:h2-N2), so that the utility of 15N NMR spectroscopy with paramagnetic lanthanides could be detd. [(C5Me5)2(THF)Pr]2(m-h2:h2-N2) and [(C5Me4H)2(THF)Pr]2(m-h2:h2-N2) were also synthesized, crystallog. 863223-78-3 and 308847-82-7 are also in the experiment. characterized, and studied by 15N NMR methods. The data were compared to those of [(C5Me5)2Sm]2(m-h2:h2-N2). [(C5Me5)2(THF)Ce]2(m-h2:h2-N2) and [(C5Me5)2(THF)Pr]2(m-h2:h2-N2) are unlike their (C5Me4H)1- analogs in that the solvating THF mols. are cis rather than trans. Structural information on precursors, (C5Me4H)3Ce, (C5Me4H)3Pr, and the oxidn. product [(C5Me5)2Ce]2(m-O) is also presented. .