1380495-17-9Relevant academic research and scientific papers
Ni(II) and Pd(II) organometallic and coordination complexes with a new tridentate N,N,O-donor ligand
Esqueda, Cristina,Alvarado-Monzon, Jose C.,Andreu-de-Riquer, Gabriel,Alfredo Gutierrez, J.,Leon-Rodriguez, Luis M. De,et al.
, p. 11 - 18 (2012/08/28)
Nickel and palladium organometallic [M(R)(NNO)] (R = CH 2 CMe 2 C 6 H 5 ; M = Pd, 1, Ni, 2; R = Me, M = Pd,3, Ni, 4; R = CH 2 SiMe 3 , M = Ni, 5) and coordinati on [MCl(NNO)] (M = Pd(II), 6, Ni(II), 7), [Ni(NNO) 2 ], 8, complexes containing the potentially tridentate Schiff base NNO-donor ligandwhich is the condensation product of 2-hidroxynaphtaldehyde and N-benzy lethylenediamine, were prepared and characterized by elemental analysis,IR and NMR spectroscopy. The crystal structure of 8 was determined by s ingle X-ray diffraction measurements. Complexes 1-6 had a square planar structure with the ligand being tridentate through the NNO atoms. On theother hand compound 7 presented a conformational equilibrium in dissolu tion at room temperature and a rigid square-planar structure at 220 K. The crystal structure of 8 indicated a monoclinic lattice, with a P2(1)/cspace group, a = 13.1799(8), b = 14.5556(9), c = 17.5018(11) ?, b = 98.0420 (10)°, Z = 4. The central Ni atom in 8 was in a N 4O 2 coordination sphere formed by two NNO Schiff base ligands. In this structure two of the Ni-N bonds trans to the oxygen atoms were significantly longer than the other two Ni-N bonds, 2.0175(17), 2.2761(17) versus 2.0070(17), 2.1794(14) ?. The two oxygen phenol atoms of the chelating ligands were cis and the distances of the Ni(II)-O(phenol) bond were 2.0410(14) and 2.0415(14) ?, respectively.
