Tris(2,2′-bipyridine)nickel(II) hexamolybdate

Abstract

The asymmetric unit of the title compound, [Ni(C10H8N2)3][Mo6O19], consists of one complex [(Ni(C10H8N2)3]2+ cation and one Lindqvist-type [Mo6O19]2− polyanion. The Ni2+ ion is in a distorted octa­hedral coordination by six N atoms from three chelating 2,2′-bipyridine ligands. The Lindqvist-type anion exhibits the characteristic Mo—O bond-length distribution, with the shortest bonds being the Mo—O(terminal) bonds [mean = 1.679 (2) Å] and the longest being those to the central O atom [mean = 2.318 (7) Å]. A number of C—H⋯O inter­actions contribute to the crystal packing.

Preparation and Powder XRD Analysis of Tris(2,2’-bipyridine)nickel(II) Trifluoroacetate

“…This suggests that the analysis is considered to be fit with low figures of merit: 3.62 (Rp), 5.76 (Rwp), 3.48 (Rexp), 2.745 (GOF), and 0.05 (Bragg R-Factor) as discussed by Toby [44] and found in several of so many reported metal oxides [2][3][4] and several complexes [5][6][7][8][9]. The detailed lattice parameters of this complex are described in Table 4 along with the corresponding cationic single crystal data of different counter anions, the hexamolybdate [39], the perchlorate [40], the bis(2thiobarbiturate)-Htba [41], the chloride [42], and the tetrachloridozincate [43]. It is clear that the cell parameters are quite similar to that of hexamolybdate with all parameters are slightly reduced.…”

“…Structural data obtained from cationic single crystal of [Ni(bipy)3] 2+ with various counter anions have been established [39][40][41][42][43]. Except for the tetrachloridozincate salt [43], all adopt the same symmetry, monoclinic, but different in space group, and consequently different cell parameters as described in Table 4.…”

“…Detailed cell parameters of [Ni(bipy)3] (X), where X= (TFA)2 . 6H2O*, (Mo6O19)2[39], (ClO4)2[40], (Htba)2•6H2O[41], and Cl2.5.5H2O[42], and [ZnCl4]2[43] (*This work was due to Le Bail method of Rietica program)…”

A Mononuclear Nickel(II) Complex: Synthesis, X-ray Structure, Spectroscopic Characterization and Anti-tumor Activity

“…The crystallographic structural parameters of 1 are listed in Table 1. The metal centric selected bond lengths and angles are presented in Table 2 [27][28]30]. The reported crystal structures showed different crystal systems and space groups and a comparison of structural refinement parameters between the reported structures and our structure is given in Table 3.…”

“…Among the available bio-relevant metalloenzymes, alkaline phosphatase enzyme contributes significantly to different biological functions ranging form DNA fragmentation to RNA replication to bone metabolism as well as bio-remediation of organophosphate pesticides [26]. Previously, several scientific groups made the effort to establish the crystal structures of tris(2,2'-bipyridine)nickel (II) in association with different counteranions like perchlorate, hexamolybdate, chloride, tetrachlorozincate and even 2-thiobarbiturate [27][28][29][30][31]. Herein, a tris(2,2'-bipyridine)nickel (II) thiocyanido complex has been synthesized and structurally characterized.…”