A Novel Molecular Metal: (Oxamide oximato) (Oxamide oxime)nickel(II). Tetracyanoquinodimethanide, [Ni(oaoH)(oaoH₂)]tcnq, and Physical Properties of its Semiconducting Pt Analogue

Abstract

<jats:p>[C<jats:sub>4</jats:sub>H<jats:sub>11</jats:sub>N<jats:sub>8</jats:sub>NiO<jats:sub>4</jats:sub>]<jats:sup>+</jats:sup>[C<jats:sub>12</jats:sub>H<jats:sub>4</jats:sub>N<jats:sub>4</jats:sub>]<jats:sup>-</jats:sup>, M<jats:sub>r</jats:sub> = 498.09 is triclinic, P1̄, a = 3.7718(6), b = 7.436(2), c = 17.511(4) Å, α = 88.67(2), β = 86.93(2), γ = 85.05(2)°, V = 488.51 Å<jats:sup>3</jats:sup>, Z = 1, d<jats:sub>c</jats:sub> = 1.69 gcm<jats:sup>-3</jats:sup>, final R<jats:sub>w</jats:sub> = 0.035 for 1454 observed independent reflections. The crystals consist of segregated regular parallel stacks of planar metal complex cations and tenq<jats:sup>-</jats:sup> counterions with intermolecular H bonds stabilizing the structure. The compound is metallic at room temperature. A metal to semiconductor transition around 230 K shows up in thermopower data, in the microwave conduc­tivity and epr around 170 K. It is not visible in the static magnetic susceptibility.</jats:p>

Synthesis And Spectral Study Of Cr(Iii), Mn(Ii), Ni(Ii) And Cu(Ii) Complexes Of Schiff Base Derived From Diacetylmonoxime With Thiourea

“…Schiff bases shows different properties including a broad range of biological activities antifungal, antibacterial, anti-malarial, antiviral, anti-allergic and anti-inflammatory, antitumor properties [2][3][4] . Schiff base oxime ligands and their complexes are widely known and studied, some oxime metal complexes are semiconducting and others have bioactive properties [5,6] . The first to identify the oxime ligands was Tschugaeff in his study of bidentate nature of vicinal dioximes, in the reaction between Ni(II) salts and dimethylglyoxime [7].…”