Embracing ligands. Synthesis, characterisation and the correlation between<sup>59</sup>Co NMR and ligand field parameters of Co(<scp>iii</scp>) complexes with a new class of nitrogen–thioether multidentate ligand
作者:Clint A. Sharrad、Germán E. Cavigliasso、Robert Stranger、Lawrence R. Gahan
DOI:10.1039/b313189k
日期:——
spin-allowed 1A1g → 1T1g and 1A1g → 1T2g and spin forbidden 1A1g → 3T1g and 1A1g → 3T2g bands, octahedral ligand-field parameters (10Dq, B and C) have been determined. DFT calculations suggest that significant interaction between the d–d and CT excitations occurs for the complexes. The calculations offer an explanation for the observed deviations from linearity of the relationship between 59Co magnetogyric
六齿的合成 配体2,2,10,10-四(亚甲基胺)-4,8-二硫十一烷(PrN 4 S 2安培),2,2,11,11-四(亚甲胺)-4,9-二硫十二烷(BuN 4 S 2安培) )和1,2-双(4,4-亚甲基胺)-2-噻吩基)苯(XyN 4 S 2 amp)的报道和配合物[Co(RN 4 S 2 amp)] 3+ (R = Pr, Bu,Xy)以单晶X射线研究为特征。低温(11 K)吸收光谱已在Nafion胶片中进行了测量。从观察到的位置来看,八面体的自旋允许的1 A 1g → 1 T 1g和1 A 1g → 1 T 2g以及自旋禁止的1 A 1g → 3 T 1g和1 A 1g → 3 T 2g谱带配体场参数(10 D q,B和C)已经确定。DFT计算表明,配合物在d-d和CT激发之间发生了显着的相互作用。这些计算为观察到的59 Co磁羟基比率与β(ΔE)-1 (β =肾上腺素比率;ΔE为1