Asymmetric and symmetric triazenido cyclopalladated complexes: Synthesis, structural analysis and DFT calculations
摘要:
The reaction of [Pd{dmba}(mu-N-3)](2) (dmba = N,N-dimethylbenzylamine) with 1-(2-fluorophenyl)-3-(4-nitrophenyl)triazenido (L-1) or 1,3-bis(4-nitrophenyl)triazenido (L-2) anions, in methanol, and subsequent treatment with pyridine (py) allows the preparation of the corresponding cyclopalladated compounds [Pd(dmba)(L-1)(py)] (1) and [Pd(dmba)(L-2)(py)].py (2). The acentric mononuclear entities of (1) and (2) are connected by weak intermolecular non-classical C-H ... C hydrogen bonds, which results in 2-D arrangements by translation, along the [1 0 0] and [0 0 1] crystallographic directions, respectively. (C) 2014 Elsevier B.V. All rights reserved.
作者:Manfredo Hörner、Lorenzo do C. Visentin、Marisa Dahmer、Jairo Bordinhao
DOI:10.1107/s0108270102004602
日期:2002.5.15
In the title complex, [Pd(C12H8FN4O2)(2)(C5H5N)(2)] or trans-[Pd(FC6H4N==N-NC6H4NO2)(C5H5N)(2)], the Pd atom lies on a centre of inversion in space group P (1) over bar. The coordination geometry about the Pd2+ ion is square planar, with two deprotonated 3-(2-fluorophenyl)-1-(4-nitrophenyl)triazenide ions, FC6H4N==N-NC6H4NO2-, acting as monodentate ligands (two-electron donors), while two neutral pyridine molecules complete the metal coordination sphere. The whole triazenide ligand is not planar, with the largest interplanar angle being 16.8 (5)inverted perpendicular between the phenyl ring of the 2-fluorophenyl group and the plane defined by the N==N-N moiety. The Pd-N(triazenide) and Pd-N(pyridine) distances are 2.021 (3) and 2.039 (3) Angstrom, respectively.