Synthesis and Characterization of Two “Tied-Back” Lithium Ketimides and Isolation of a Ketimide-Bridged [Cr<sub>2</sub>]<sup>6+</sup> Dimer with Strong Antiferromagnetic Coupling
作者:Greggory T. Kent、Andrew W. Cook、Peter L. Damon、Richard A. Lewis、Guang Wu、Trevor W. Hayton
DOI:10.1021/acs.inorgchem.1c00052
日期:2021.4.5
CrCl3 with 3.5 equiv of 6 results in formation of the [Cr2]6+ dimer, [Li][Cr2(N═C10H14)7] (7), which can be isolated in modest yield after work-up. Complex 7 features a Cr–Cr bond length of 2.653(2) Å. Additionally, solid-state magnetic susceptibility measurements reveal strong antiferromagnetic coupling between the two Cr centers, with J = −200 cm–1.
1个当量KN(森达的反应3)2与地层中的(ME的9-芴结果3 Si)的N = C 13 ħ 8(1后处理后以高收率)。1个当量的苯酚的加成到1所导致快速脱甲硅基和形成9-芴亚胺,HN═C的13 ħ 8(2)。的后续反应2与1个当量的LiN我镨2次的结果中去质子化和形成[李(ET的2 O)] 4 [N = C 13 H ^ 8 ] 4(3),产量高。1个当量KN(森达的反应3)2与2-金刚烷酮在室温下导致形成(ME 7天3 Si)的N = C 10 H ^ 14(4以良好的收率)。溶解4在MeOH中整齐导致快速脱甲硅烷基伴随形成2-金刚烷酮亚胺,HN═C的10 ħ 14(5)。的后续反应5与1个当量的LiN我镨2个导致形成[李(THF)]的4 [N = C 10 H ^ 14 ] 4(6)。两个3和6通过X射线晶体学进行了表征。最后,肌酐清除率的反应3与3.5当量的6个在形成[CR的结果2 ]