Bolligarla, Ramababu ; Durgaprasad, Gummadi ; Das, Samar K. (2009) A nitrogen rich Ni(II)-dithiolate system exhibiting acid-base behavior: synthesis, supramolecular structure and spectroscopy of [Bu4N]2[NiII(ppdt)2] (ppdt = pyrido[2,3-b]pyrazine-2,3-dithiolate) Inorganic Chemistry Communications, 12 (5). pp. 355-358. ISSN 1387-7003
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.inoche.2009.02.008
Abstract
The compound [Bu4N]2[Ni(ppdt)2] (1) (ppdt = pyrido[2,3-b]pyrazine-2,3-dithiolate) has been synthesized, starting from pyrido[2,3-b]pyrazine-2,3-dithiol, nickel chloride and tetrabutylammonium bromide in methanol. Compound 1 crystallizes in P21/c space group (monoclinic system). Its crystal structure is characterized by interesting C-H···S and C-H···N supramolecular weak interactions. Its solution state has been described with acid-base (protonation-deprotonation) behavior, that has rarely been investigated for a metal-dithiolene system. Compound 1 is first instance of a metal-dithiolene compound that has three ring nitrogen on each dithiolate ligand. The pH dependent changes in the charge-transfer absorption band are attributed to the protonation on an imine nitrogen of the ppdt ligand. The complex is electrochemically quasi-reversible with an oxidation potential of E1/2 = +0.46 V vs. Ag/AgCl in methanol.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Nickel(II)-dithiolene; Crystal Structure; Supramolecular Chemistry; Acid-base Behavior |
| ID Code: | 63416 |
| Deposited On: | 29 Sep 2011 04:32 |
| Last Modified: | 29 Sep 2011 04:32 |
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