Synthesis, structure and solid-state electrical conductivity of bis(1,2-diphenylethylene-1,2-dithiolate)nickel(II)

Abstract

One nickel(II)-dithiolene complex bis(1,2-diphenylethylene-1,2-dithiolate)nickel(II) has been synthesized and crystallographically characterized. The complex is square planar at its metal centre. The compound in its solid-state is found to conduct electricity at room temperature. Variation of conduction is also found on raising the temperature. Instead of a metal…metal orbital overlap, the electron density is expected here to pass through some other covalent and electrostatic bonds of the compound in solid-state resulting in electricity conduction.

The quest for single component molecular metals within neutral transition metal complexes

“…135 In the case of [Ni(dpedt) 2 ] 136 (dpedt: 1,2-diphenyl-1,2-ethylenedithiolate, Chart 3), as a compressed pellet, displays a semiconductor behaviour with a s RT of 9.47 Â 10 À6 S cm À1 . [137][138][139][140] A series of BTM complexes with ligands based on the 1,2-ethylenedithiolate, bearing CF 3 groups, [M(tds) 2 ] (tds: [bis(trifluoromethyl)-ethylene]diselenolate, M: Ni and Pt) was also prepared, however their properties were not reported. [141][142][143] The synthesis of a few other neutral BTM complexes with different ligands can be found in literature, however their transport properties were not reported, since these compounds were prepared in a different context than SCMM.…”

The rigidity and chelation effect of ligands on the hydrogen evolution reaction catalyzed by Ni(ii) complexes

“…5 To obtain cost-effective electrocatalysts, metal complexes based on Ni, [6][7][8] Co, [9][10][11] Zn, 12 Cu, 13 Mn, 14 Fe, 15 and Pd 16 have been reported as electrocatalysts showing substantial hydrogen evolution reaction (HER) activity. 17 Dithiolene-based metal complexes are another class of complexes that are conductive 18 and electrocatalytically active, 19 and exhibit non-linear optical properties. 20,21 The MN 2 S 2 chromophore promotes the ease of electron transfer, and therefore facilitates the electrocatalytic reactions and the strong solution luminescence 22 with solvatochromism 23 (indicative of coordination unsaturation with changes in coordination geometry).…”