Structural Study of Nickel(II), Copper(II), and Palladium(II) Complexes of 2-Pyridineformamide 3-Hexamethyleneiminylthiosemicarbazone

Abstract

Reduction of 2-cyanopyridine by sodium in the presence of 3-hexamethyleneiminylthiosemicarbazide produces 2-pyridineformamide 3-hexamethyleneiminylthiosemicarbazone, HAmhexim. Complexes with nickel(II), copper(II) and palladium(II) have been prepared and the following complexes structurally characterized:Coordination is via the pyridyl nitrogen, imine nitrogen and thiolato or thione sulfur atom when coordinating as the anionic or neutral ligand, respec- Strukturuntersuchungen von Nickel(II)-, Kupfer(II)-und Palladium(II)-Komplexen von 2-Pyridinformamid-3-hexamethyleniminylthiosemicarbazonInhaltsübersicht. 2-Pyridinformamid-3-hexamethyleniminylthiosemicarbazon, HAmhexim, wird durch Reduktion von 2-Cyanopiridin mit Natrium in Gegenwart von 3-Hexamethyleniminylthiosemicarbazid hergestellt. Die Komplexe mit Nickel(II), Kupfer(II) und Palladium(II) wurden synthetisiert und die folgenden Komplexe durch Kristallstrukturanalysen charakterisiert: [Ni(Amhexim)OAc], [{Cu(Amhexim)} 2 C 4 H 4 O 4 ]·2DMSO·H 2 O, [Cu(HAmhexim)Cl 2 ] und [Pd(Amhexim)Cl]. Die Koordination der Liganden erfolgt über das Pyridylstickstoffatom, das Iminstickstoffatom und

Syntheses, Structures and Photoluminescence of a Series of Transition Metal-Cyanopyridine Polymers

“…The bond lengths of Cu-Cl range from 2.288(1) to 2.865(1) Å with an average value of 2.576(1) Å, which are normal and comparable with the counterparts found in the literatures. [18][19][20][21][22][23][24][25] The bond length of Cu-N py is 2.022(3) Å, which is similar to those reported previously. [26][27][28] The CuCl 4 N 2 octahedra interconnect to each other via two µ 2 -Cl atoms, giving a 1-D chain parallel to the a-axis [ Fig.…”

“…The bond length of Cu-Cl is between 2.2886(7) and 2.920(2) Å, which is close to that of 1 and comparable to those documented. [18][19][20][21][22][23][24][25] The bond length of Cu-N py is 2.028(2) Å, similar to that of 1. The CuCl 4 N 2 octahedra connect together through two µ 2 -Cl atoms, yielding a 1-D chain running along the a-axis [ Fig.…”

Synthesis, characterization, crystal structure and electrochemical behavior of a nickel(II) complex of 5,6-dihydro-2H-pyran-3-aldehyde thiosemicarbazone

“…In particular, the shifts in m(C@N) and m(NAN) provide evidence for coordination through the azomethine nitrogen atom [31][32][33]. The appearence of a new band at 480 cm À1 which correspond to the m(NiAN) vibration band is another indication of the involvement of nitrogen of the azomethine group in coordination [34][35][36]. The uncomplexed ligand exhibits the thioamide IV band at 795 cm À1 .…”

“…This is a consequence of the coordination of sulfur from the C@S(NH2) group as reported earlier [27,39]. The new band at 390 cm À1 assigned to m(NiAS) vibration [27,[34][35][36][37][38] is additional evidence for the involvement of the CAS group in bonding. The solid state electronic spectrum (Nujol mull) of the [Ni(DPTSC) 2 Á EtOH shows three bands at 23,753, 19,230 and 15,504 cm À1 assigned to 1 A 1g !…”

“…Moreover, N-heterocyclic thiosemicarbazones have attracted the greatest attention in recent years, and many reports involve crystal structures of these thiosemicarbazones and/or their metal complexes [14][15][16][17][18][19][20][21][22][23][24]. However, less attention has been given to O-heterocyclic thiosemicarbazones [25][26][27].…”