Bhaduri, Sumit ; Gupta, Nalinava Sen ; Lahiri, Goutam Kumar ; Mathur, Pradeep (2004) Studies on the reactions of dihydrogen with salts of platinum carbonyl cluster anions (chini clusters) and redox active countercations Organometallics, 23 (15). pp. 3733-3740. ISSN 0276-7333
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Official URL: http://pubs.acs.org/doi/abs/10.1021/om049833e
Related URL: http://dx.doi.org/10.1021/om049833e
Abstract
Reactions of An[Pt12(CO)24] (A = methylene blue (MB+), safranine O (Saf+), nicotinamide benzyl chloride (BNA+), n = 2; A = methylviologen (MV2+), n = 1) with dihydrogen in DMF and DMSO have been studied. Spectroscopic (NMR, ESR, and UV-vis) monitoring shows selective and total reduction of MB+, Saf+, and MV2+ to MBH, SafH, and MV+. respectively, accompanied by conversion of [Pt12(CO)24]2- to [Pt9(CO)18]2-. No BNAH (analogue and model for NADH) is formed in the reaction of [BNA]2[Pt12(CO)24] with dihydrogen. However, in the reactions of BNA+Cl-, [Saf]2[Pt12(CO)24], and dihydrogen, BNAH is formed in small quantities in DMSO and quantitatively in a biphasic system (water and dichloromethane). The redox behaviors of MB+, Saf+, MV2+, and BNA+ as chloride salts have also been studied in DMF by cyclic voltammetry, and the data have been used to rationalize some of the observed reactions. The dihydrogen-driven, [Bu4N]2[Pt12(CO)24]-catalyzed transport of A+ (A+ = MB+, Saf+) as AH through a liquid membrane has also been studied.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| ID Code: | 2152 |
| Deposited On: | 08 Oct 2010 09:04 |
| Last Modified: | 17 Jan 2011 10:52 |
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