trans-[FeL2"Cl(2)] (3), are described. Compounds 2 and 3 are both mononuclear Fe(III) complexes where the metals occupy octahedral positions. In principle, L2 is expected to coordinate to metal ions through its bipyridine-type units to form a five-membered ring; however, this is not the case in compounds 2 and 3. In 2, the ligand coordinates through its pyridines and through the hydroxyl group attached to the pyrazine
of ligands and Ti‐based complexes of tetrakis‐2,3‐[5,6‐di‐R8‐pyrazino]porphyrazine (R = H, 2‐Py, Ph). UV/Vis measurements in different solvents confirm molecular aggregation, which results more pronounced in the presence of 2‐pyridil and phenyl substituents on the macrocycle edge. Because of low solubility, solid state NMR was applied for structure characterization. Additional IR and MALDI‐TOF were carried
Tetra-2,3-pyrazinoporphyrazines with Externally Appended Pyridine Rings. 5. Synthesis, Physicochemical and Theoretical Studies of a Novel Pentanuclear Palladium(II) Complex and Related Mononuclear Species
作者:Maria Pia Donzello、Elisa Viola、Xiaohui Cai、Luisa Mannina、Corrado Rizzoli、Giampaolo Ricciardi、Claudio Ercolani、Karl M. Kadish、Angela Rosa
DOI:10.1021/ic702430j
日期:2008.5.1
New palladium(II) complexes of the free-base tetrakis[2,3-(5,6-di-2-pyridylpyrazino)porphyrazine], [Py 8TPyzPzH 2], have been prepared and their physicochemical properties examined. The investigated compounds are the pentanuclear species [(PdCl 2) 4Py 8TPyzPzPd], the monopalladated complex [Py 8TPyzPzPd], and its corresponding octaiodide salt [(2-Mepy) 8TPyzPzPd](I) 8. All three Pd (II) complexes have
Tetra-2,3-pyrazinoporphyrazines with Peripherally Appended Pyridine Rings. 20. Mono- and Pentanuclear Al<sup>III</sup> and Ga<sup>III</sup> Complexes: Synthesis and Physicochemical and Photoactivity Studies
作者:Giulia Saltini、Lei Cong、Maria Pia Donzello、Claudio Ercolani、Elisa Viola、Ida Pettiti、Pavel A. Stuzhin、Karl M. Kadish
DOI:10.1021/acs.inorgchem.9b02279
日期:2019.11.18
The autocyclotetramerization of the precursor 2,3-dicyano-5,6-di(2′-pyridyl)pyrazine [(CN)2Py2Pyz] in the presence of MCl3 compounds (M = AlIII, GaIII) leads to the formation of the new mononuclear porphyrazine complexes [Py8TPyzPzMCl]·xH2O (Py8TPyzPz = tetrakis-2,3-[5,6-di(2-pyridyl)pyrazino]porphyrazinato anion). From these species, the hydroxide analogues [Py8TPyzPzMOH]·xH2O were obtained by contact
前体2,3-二氰基-5,6-二(2'-吡啶基)吡嗪[(CN)2 Py 2 Pyz]在MCl 3化合物(M = Al III,Ga III)存在下的自环四聚反应导致形成新的单核卟啉复合物[Py 8 TPyzPzMCl]· x H 2 O(Py 8 TPyzPzMz = tetrakis-2,3- [5,6-di(2-pyridyl)pyrazino] porphyrazinato阴离子)。从这些物质中,通过与热水接触获得氢氧化物类似物[Py 8 TPyzPzMOH]· x H 2 O,以及它们相应的五核物质[(PdCl 2)4 Py8 TPyzPzMCl]· X ^ h 2 ö可以通过用的PdCl反应可以容易地形成2。单核和五核大环的理化特性基于元素分析以及质量,粉末X射线和IR光谱。的UV-vis在DMF,DMSO,或解决方案的单核物种的光谱研究吡啶(ç ≈10 -5 -10 -6M)(主
Structural, UV−Visible, and Electrochemical Studies on 2,3-Dicyano-5,6-di-2-pyridylpyrazine, [(CN)<sub>2</sub>Py<sub>2</sub>Pyz], Related Species and Its Complexes [(CN)<sub>2</sub>Py<sub>2</sub>PyzMCl<sub>2</sub>] (M = Pt<sup>II</sup>, Pd<sup>II</sup>)
作者:Xiaohui Cai、Maria Pia Donzello、Elisa Viola、Corrado Rizzoli、Claudio Ercolani、Karl M. Kadish
DOI:10.1021/ic8023277
日期:2009.8.3
give the macrocycle tetrakis[5,6-di(2-pyridyl)-2,3-pyrazino]porphyrazine, [Py8TPyzPzH2], bearing externally four dipyridinopyrazine fragments, reacts with bis(benzonitrile)dichloroplatinum(II), [(C6H5CN)2PtCl2], in CH3CN, affording the monometalated species [(CN)2Py2PyzPtCl2]. Single-crystal X-ray work on this compound shows that PtII is bound to [(CN)2Py2Pyz] through the two pyridine N atoms (“py−py”