466685-39-2Relevant academic research and scientific papers
Dimeric cyclopalladated azobenzenes: Structural differences between 2-hydroxypyridine and 2-mercaptopyridine bridged complexes
Maity, Subrata,Roy, Ramkrishna,Sinha, Chittaranjan,Sheen, Wen-Jyh,Panneerselvam, Kaliyamoorthy,Lu, Tian-Huey
, p. 202 - 209 (2007/10/03)
Binuclear chloro-bridged cyclopalladated azobenzenes [Pd(A)Cl]2 (A = ortho-metallated azobenzene or its derivatives) have been reacted with aqueous (aq.) AgNO3 followed by the addition of 2-hydroxypyridine (2-PyOH: donor centres of deprotonated form abbreviated N.O)/2-mercaptopyridine (2-PySH; donor centres of deprotonated form abbreviated N,S) in presence of Et3N to synthesis bridged dinuclear compound [Pd(A)(μ-N,O)]2-[Pd(A)(μ-N,S)]2. The compositions of the complexes have been established by elemental analyses, IR, UV-vis, 1H and 13C-NMR spectral data. The structural confirmation has been carried out by X-ray crystallography. The structures show anti-sysmmetric metallacycle in the dimer and N,O/N,S bridging arrangement. The dimer [Pd(A1)(μ-N,X)]2 shows strong Pd?Pd interaction (A1 = 2-(phenylazo)benzene). The coordination mode in [Pd(A1)(μ-N,O)]2 shows trans pyridine-N to Pd-N(azo) bond while in [Pd(A1)(μ-N,S)]2 pyridine-N is trans to the Pd-C bond. The square planes are convergent towards heterocyclic bridging side.
