Chromium(III) complexes with 1,2,4-diazaphospholide and 2,6-bis(N-1,2,4-diazaphosphol-1-yl)pyridine ligands: synthesis, X-ray structural characterization, EPR spectroscopy analysis, and magnetic susceptibility studies

Su Jing; Duan Lian; Zheng Wenjun

首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >Chromium(III) complexes with 1,2,4-diazaphospholide and 2,6-bis(N-1,2,4-diazaphosphol-1-yl)pyridine ligands: synthesis, X-ray structural characterization, EPR spectroscopy analysis, and magnetic susceptibility studies

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Chromium(III) complexes with 1,2,4-diazaphospholide and 2,6-bis(N-1,2,4-diazaphosphol-1-yl)pyridine ligands: synthesis, X-ray structural characterization, EPR spectroscopy analysis, and magnetic susceptibility studies

机译：具有1,2,4-二氮杂磷化物和2,6-双（N-1,2,4-二氮杂磷-1-基）吡啶配体的铬（III）配合物：合成，X射线结构表征，EPR光谱分析和磁化率研究

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Three chromium(III) 1,2,4-diazaphospholide complexes were prepared: 3,5-di-tert-butyl-1,2,4-diazaphospholide chromium(III) dichloride [(eta(2)-3,5-tBu(2)dp)Cr(THF)(2)Cl-2] (1), 3,5-di-phenyl-1,2,4-diazaphospholide chromium(III) dichloride [(eta(2)-3,5-Ph(2)dp)Cr(THF)(2)Cl-2] (2), and 2,6-bis(N-1,2,4-diazaphosphol-1-yl)pyridine chromium(III) trichloride {[2,6-bis(N-1,2,4-diazaphosphol-1-yl) pyridine] CrCl3} (3). X-ray diffraction analysis has shown that these six-coordinate complexes each have a pseudo-octahedral configuration. Electron paramagnetic resonance (EPR) spectroscopy data for complex 1 for the paramagnetic S = 3/2 system (d(3) electron configuration) confirm a Cr(III) center in the octahedral coordination environment. The magnetic susceptibility of complex 1 followed the Curie-Weiss law well between 25 and 300 K. The magnetic moment of 1 was found to be close to the spin-only magnetic moment expected for three unpaired electrons (3.87 mu(B)).

机译：制备了三种铬（III）1,2,4-二氮杂磷化物配合物：3,5-二叔丁基-1,2,4-二氮杂磷二氯化铬（III）[（eta（2）-3,5-tBu （2）dp）Cr（THF）（2）Cl-2]（1），3,5-二苯基-1,2,4-二氮杂磷二氯化铬（III）[[eta（2）-3,5 -Ph（2）dp）Cr（THF）（2）Cl-2]（2）和2,6-双（N-1,2,4-二氮杂膦-1-基）吡啶三氯化铬（III）{ [2，6-双（N-1,2,4-二氮杂膦-1-基）吡啶] CrCl3}（3）。 X射线衍射分析表明，这些六坐标络合物各自具有伪八面体构型。顺磁性S = 3/2系统（d（3）电子构型）的配合物1的电子顺磁共振（EPR）光谱数据证实了八面体配位环境中的Cr（III）中心。配合物1的磁化率在25至300 K之间很好地遵循居里-魏斯定律。发现1的磁矩接近于三个不成对电子（3.87 mu（B））预期的仅自旋磁矩。

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《Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences》 |2016年第7期|共8页
作者
Su Jing; Duan Lian; Zheng Wenjun;
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中图分类化学;
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chromium(III); 1; 2; 4-diazaphospholide; 2; 6-di(N-1; 2; 4-diazaphosphol-1-yl)pyridine; EPR analysis; magnetic susceptibility;

机译：铬（III）;1;2;4-二氮杂磷;2;6-二（N-1;2;4-二氮杂磷-1-基）吡啶;EPR分析;磁化率;

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Chromium(III) complexes with 1,2,4-diazaphospholide and 2,6-bis(N-1,2,4-diazaphosphol-1-yl)pyridine ligands: synthesis, X-ray structural characterization, EPR spectroscopy analysis, and magnetic susceptibility studies

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