Direct Spectroscopic Observation of Large Quenching of First-Order Orbital Angular Momentum with Bending in Monomeric, Two-Coordinate Fe(II) Primary Amido Complexes and the Profound Magnetic Effects of the Absence of Jahn− and Renner−Teller Distortions in Rigorously Linear Coordination
作者:W. Alexander Merrill、Troy A. Stich、Marcin Brynda、Gregory J. Yeagle、James C. Fettinger、Raymond De Hont、William M. Reiff、Charles E. Schulz、R. David Britt、Philip P. Power
DOI:10.1021/ja903439t
日期:2009.9.9
The monomeric iron(II) amido derivatives FeN(H)Ar*}(2) (1), Ar* = C(6)H(3)-2,6-(C(6)H(2)-2,4,6-Pr(i)(3))(2), and FeN(H)Ar(#)}(2) (2), Ar(#) = C(6)H(3)-2,6-(C(6)H(2)-2,4,6-Me(3))(2), were synthesized and studied in order to determine the effects of geometric changes on their unusual magnetic properties. The compounds, which are the first stable homoleptic primary amides of iron(II), were obtained
单体铁(II)氨基衍生物 FeN(H)Ar*}(2) (1), Ar* = C(6)H(3)-2,6-(C(6)H(2)- 2,4,6-Pr(i)(3))(2), 和 FeN(H)Ar(#)}(2) (2), Ar(#) = C(6)H(3)合成并研究了-2,6-(C(6)H(2)-2,4,6-Me(3))(2),以确定几何变化对其异常磁性能的影响。该化合物是第一个稳定的铁(II)均配伯酰胺,是通过FeN(SiMe(3))(2)}(2)与HN(SiMe(3))(2的转氨基作用获得的。 ) 被伯胺 H(2)NAr* 或 H(2)NAr(#) 消除。X射线晶体学表明它们具有严格线性(1)或弯曲(2,N-Fe-N = 140.9(2)度)铁配位。变温磁化和外加磁场穆斯堡尔谱研究揭示了磁特性对金属配位几何形状的极大依赖性。在环境温度下,线性 1 显示出 7.0-7.50 mu(B) 范围内的