Pyrazole and Pyrazolate as Ligands in the Synthesis and Stabilization of New Palladium(II) and (III) Compounds
作者:Francisco Estevan、Pipsa Hirva、Albert Ofori、Mercedes Sanaú、Tanja Špec、MAngeles Úbeda
DOI:10.1021/acs.inorgchem.5b02506
日期:2016.3.7
paddlewheel dinuclear palladium(II) compounds with pyrazolato bridging ligands described and characterized in the literature. In the process of the synthesis of 2a, a new tetranuclear intermediate compound, [Pd4μ-(C6H4)PPh2}4(μ-pz)2(μ–OH)2] (3a), has been isolated and structurally characterized. Compounds of the general formula [Pd2μ-(C6H4)PPh2}2Br2(R,R′2pzH)2] (R = R′ = H, 4a; R = Br; R′ = H, 4b;
吡唑/吡唑酸酯作为配体的多功能性允许合成和结构表征四种不同类型的新型原金属钯化合物,对此进行了DFT计算以研究其相对稳定性。[钯2 μ-(C 6 H ^ 4)PPH 2 } 2 μ-(R,R' 2 PZ)} 2 ](R = R'= H,2a中; R = Br的,R'= H,2b的; R = CH 3,R'= H,2c中; R = H,R'= CH 3,2D ; R = Br的,R'= CH 3,图2e)与化合物外型二齿吡唑并苯二酚是第一种具有吡唑并桥联配体的桨轮双核钯(II)化合物,在文献中有描述和表征。在合成2a的过程中,一种新的四核中间体化合物[Pd 4 μ-(C 6 H 4)PPh 2 } 4(μ-pz)2(μ-OH)2 ](3a)已被合成。分离并具有结构特征。通式的化合物[钯2 μ-(C 6 H ^ 4)PPH 2 } 2溴2(R,R' 2 PZH)2](R = R'= H,4A