trans-Diaquabis(thiosemicarbazido-κ²N,S)nickel(II) dimaleate dihydrate

Abstract

In the title compound, [Ni(CH(5)N(3)S)(2)(H(2)O)(2)](C(4)H(3)O(4))(2).2H(2)O, the Ni atom lies on a center of symmetry and is coordinated by N and S atoms from two thiosemicarbazide ligands and the O atoms of two water molecules in a distorted octahedral geometry. In the asymmetric unit, the three components are linked together by one O-H...O and two N-H...O hydrogen bonds. The packing is built from molecular ribbons parallel to the b direction, stabilized by intramolecular hydrogen bonds, and by one N-H...S and two N-H...O intermolecular hydrogen bonds. The ribbons are further connected into columns by N-H...O interactions and then into a three-dimensional network by three O-H...O hydrogen bonds.

Topological Features of Both Electron Density and Electrostatic Potential in the Bis(thiosemicarbazide)zinc(II) Dinitrate Complex

“…As previously mentioned, the [Zn(TSC) 2 ](NO 3 ) 2 complex, together with some dicarboxylic salts, has been used as the reactant in the synthesis of several supramolecular structures. 9a,g,d In each of these structures, the Zn atom within a corresponding cationic TSC building block increases its coordination number to 5 or 6, in contrast to a nickel building block, [Ni(TSC) 2 ] 2+ , which often preserves its original coordination number of 4. 9b,h,10a The rather nucleophic zone (F) could be responsible for the increase of the coordination number of Zn in the synthesis of the complexes entering the mentioned supramolecular structures.…”

“…However, recent investigations in the field of supramolecular chemistry find some of these complexes suitable building blocks or so-called “synthons” for supramolecular structures. , Owing to the fact that the thiosemicarbazide is a relatively small unit, it possesses considerable hydrogen donor capacity and therefore can be easily incorporated into hydrogen-bonding systems. Using the [M(TSC) 2 ] 2+ complex cations (M = Ni and Zn) and the anions of different dicarboxylic acids, Burrows et al have developed a synthetic method for generation of supramolecular arrays with the incorporated metal ions. , In the aggregation process for these ionic species, particular importance has been devoted to the complementary hydrogen bonding formed between the pair of donors (N 2 , N 3 ) of the thiosemicarbazide complex and the pair of acceptors that are the oxygen atoms of the carboxylate group. The complementary hydrogen bonding, which is assigned in Etter's graph set notation as a R motif, has been considered as the basis of the process of self-assembly.…”

Synthesis and crystal structure of thiosemicarbazide complexes of nickel(II) and copper(II)

“…Thus, a comparison between II and its anhydrous analogue shows that crystallization water produces significant changes not only in the crystal structure but in the symmetry of the complex as well. Structure III was solved earlier based on photo graphic experimental data [10]. For this reason, the hydrogen atoms in III were not located and the hydro gen bonds, which play an important role in crystal for mation, were not determined.…”

“…The Ni-N, Ni-S, and Ni-L ax bond lengths in such compounds are as follows: 2.075, 2.363, and 2.166 Å in trans diqua bis(thiosemicarbazido N,S)nickel(II) bis(hydrogen maleate) dihydrate [10]; 2.052, 2.407, and 2.105 Å in diaqua bis(thiosemicarbazide N,S)nickel(II) dini trate [11]; and 2.093, 2.403, and 2.063 Å in diaqua trans bis(thiosemicarbazide N + ,S)nickel(II) fuma rate [6]. An analogous situation is found in the mole cule of bis(thiacyanato N)bis(thiosemicarbazide N,S)nickel(II): Ni-N, 2.071; Ni-S, 2.428; and Ni-N NCS 2.092 Å [12].…”

Transition metal complexes with thiosemicarbazide-based ligands. XLIV. The supramolecular arrangement in the Ni(II) complexes of S-methylisothiosemicarbazide

“…According to the numerous reports, bis(thiosemicarbazide) metal complexes appeared to be very good candidates for these kinds of structures, since their adducts with different dicarboxylate anions exhibit a variety of crystalline architectures [1][2][3][4][5][6][7][8]12]. Namely, thiosemicarbazide (TSC), N 1 H 2 -N 2 H-C 3 (@S)-N 4 H 2 , behaves as a bidentate ligand coordinated through the terminal N 1 and S atoms, the remaining N atoms (the hydrazine N 2 and thioamide N 4 ) form the hydrogen bonding donor pair, suitably oriented for the interaction with the acceptor pair, i.e.…”