Department of Chemistry, Bar-Ilan University, Ramat Gan, 52 900, Israel.
Dalton Trans. 2012 Jan 7;41(1):47-9. doi: 10.1039/c1dt11868d. Epub 2011 Nov 15.
Herein, the N-R substituted N,O-phenol-pyrazole redox-active pro-ligands, (R)LH (R = Me, Pr) are reported together with their corresponding bis-Cu(R)L(2) complexes (2 and 3, respectively). The latter are reversibly oxidised to the corresponding stable Cu(II)-phenoxyl radical complexes 2(+) and 3(+). The properties of the tetrahedrally distorted complexes 2 and 3 (and those of 2(+) and 3(+)) are being compared to those of the square-planar H-bonded complex 1 (bis-Cu(H)L(2)) and those of 1(+). These studies have permitted H-bonding and steric effects on the redox, spectroscopic and chemical properties of Cu(II)-phenolate and Cu(II)-phenoxyl radical species to be established.
本文报道了 N-R 取代的 N,O-苯并吡唑氧化还原活性前配体 (R)LH（R = Me，Pr），以及它们相应的双 Cu(R)L(2)配合物（分别为 2 和 3）。后者可被可逆氧化为相应的稳定的 Cu(II)-苯氧自由基配合物 2(+)和 3(+)。四配位的配合物 2 和 3（以及 2(+)和 3(+)）的性质与平面正方形氢键配合物 1（双 Cu(H)L(2)）和 1(+)的性质进行了比较。这些研究确立了氢键和空间位阻效应对 Cu(II)-苯氧酸盐和 Cu(II)-苯氧自由基物种的氧化还原、光谱和化学性质的影响。
