Spectral and electrochemical studies on oxoisothiocyanatobis (pyrrolidinyldithiocarbamato) molybdenum (V)
TL;DR: In this article, the complex oxoisothiocyanatobis(pyrrolidinyldithiocarbamato)molybdenum(V), MoO(NCS) (pyrroldtc) 2 was prepared.
Abstract: The complex, oxoisothiocyanatobis(pyrrolidinyldithiocarbamato)molybdenum(V), MoO(NCS) (pyrroldtc) 2 was prepared. The IR spectra of the complex suggest that the thiocyanate group is attached through nitrogen and the presence of MoO 3+ moiety. The voltammograms of the complex in acetonitrile exhibited a pronounced cathodic wave at −0.23 V vs S.C.E. which was attributed to Mo(V)/Mo(IV) couple. The magnetic, epr and electrochemical studies indicate that the compound is mononuclear and molybdenum is in +5 oxidation state.
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TL;DR: In this paper, the infrared spectra of dithiocarbamato and N−alkyldithiamato complexes with various metals have been obtained in the range between 4000 and 280 cm-1.
Abstract: The infrared spectra of dithiocarbamato and N‐alkyldithiocarbamato complexes with various metals have been obtained in the range between 4000 and 280 cm—1. The spectra of their deuterated forms have also been obtained to confirm the band assignments. A normal‐coordinate analysis has been carried out for the 1:1 (metal/ligand) model of the dithiocarbamato PtII complex. The results indicate that the Pt–S stretching bands are at 375 and 288 cm—1 and the corresponding Pt–S stretching force constant is 2.1×105 dyn/cm. The effects of changing the metal and of alkyl substitution on the electronic structure of these compounds have been inferred from the infrared spectra.
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TL;DR: The biological role of molybdenum, biophysical studies of the molybordenum atoms, and aspects of coordination chemistry that bear on the understanding of Molybdo-enzymes are discussed in this paper.
Abstract: The biological role of molybdenum, biophysical studies of the molybdenum atoms in molybdo-enzymes, and aspects of coordination chemistry that bear on the understanding of molybdo-enzymes.
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TL;DR: The complexes OMoX 2 L 2 (L = S 2 )CNEt 2 ) 2 and OMoXL 2 (X = Cl, Br) as mentioned in this paper showed the lack of atom transfer ability of tungsten(VI) relative to its molybdenum analog.
Abstract: The complexes OMoX 2 L 2 (L = S 2 )CNEt 2 ) 2 react with Na 2 S 2 O 4 to yield OMoL 2 (X = Cl), with PhNCO to yield (PhN)MoX 2 L 2 (X = Cl), with PPh 2 Et to give MoX 2 (PPh 2 Et)L 2 (X = Cl, Br), and with OMol 2 to produce OMoXL 2 (X = Cl, Br). The epr spectra of OMoXL 2 display halogen superhyperfine splitting [A( 35,37 Cl) = ∼3 gauss; A(bb]79,81Br) = 12.3 gauss). Reaction of WCl 6 with NaL in MeOH yields the new complex OWCl 2 L 2 which either does not react at all or gives no characterizable products with the above reagents. The results demonstrate the lack of atom transfer ability of tungsten(VI) relative to its molybdenum analog.
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