Bis[N,N-diisobutyl-N′-(2-thienylcarbonyl)thioureato]nickel(II)

Abstract

In the title complex, [Ni(C14H21N2OS2)2], the NiII ion is in a square‐planar coordination enviroment. The ligands assume a cis arrangement with respect to each other around the NiII ion, which lies on a crystallographic twofold rotation axis running parallel to the c axis. The title complex is isostructural with the copper(II) analogue.

Synthesis and Characterization of Novel Thiourea Derivatives and Their Nickel and Copper Complexes

“…The bond length is C-N shorter than a normal single C-N bond. This is due to strong delocalization in the chelate rings [42][43][44].…”

Nickel(II) complexes of N′-(2-thienylcarbonyl)thiocarbamates O-alkyl-esters: Structural and spectroscopic characterization and evaluation of their microbiological activities

“…[Ni(ttpte) 2 ] and [Ni(tthxe) 2 ] exhibit square-planar geometries for their coordination spheres as imposed by the crystallographic symmetries. The bond lengths between atoms of the co-ordination rings are within the range reported for similar complexes, both derived from thioureas [26][27][28] and from thiocarbamates. In particular, the values obtained for [Ni(ttete) 2 ] are similar to those presented for the analogous compound [Ni(ttpre) 2 ] [25].…”

Thermochemistry of Cu(II) and Ni(II) complexes with N,N-di-n-butyl-N′-thenoylthiourea and N,N-di-iso-butyl-N′-thenoylthiourea

“…Due to their low volatility, the enthalpies of sublimation of the four metal complexes could not be measured, although the similarity of their crystalline structures [12,13] suggests similar values for their enthalpies of sublimation.…”

“…being d Á D g cr H m , the differences between the molar enthalpies of sublimation of the nickel and copper complexes which are expected to be very small due to the similarity of their crystal structures [12,13]. To derive the enthalpy of the metal-metal, Ni(II) to Cu(II), exchange reaction the standard molar enthalpies of formation of Ni(g) and Cu(g), at T = 298.15 K, respectively, (429.7 ± 0.4) kJ Á mol À1 [21] and (338.3 ± 0.4) kJ Á mol À1 [21] were used, D r;exchange=metal H m ðL ¼ nbtuÞ ¼ þð161 AE 14Þ kJ Á mol À1 ; D r;exchange=metal H m ðL ¼ ibtuÞ ¼ þð159 AE 15Þ kJ Á mol À1 ; thus, for the two ligands, the enthalpies of the metal-metal, Ni(II) to Cu(II), were found to be equal.…”

“…Those ligands form isostructural [12,13] copper(II) and nickel(II) square planar complexes with a cis-O 2 S 2 coordination sphere.…”