Tris(dithioacetylacetonato)chromium(III)

Abstract

The synthesis of the first dithioaoetylacetonate of a Group VI transition metal has been achieved by reduction of the 3,5-dimethyl-1,2-dithiolium cation with divalent chromium. The physical properties of the dark green monomer [Cr(SacSac)3] are reported.

Influence of oxygen and sulfur donor atoms on the electrochemistry of transition metal tris chelates

“…The gradients of these plots also provide a check of the diffusion coefficients for reversible cases. The charge-transfer coefficient, a, was evaluated using the equation32 (V) (2) and fa, the rate constant for the heterogenous charge-transfer, from32 n2F*ACAEfa…”

“…A second-law deduction of the enthalpy and entropy of equilibrium I is shown in Figure 4. The straight line is the result of a least-squares treatment of the 12 data points of experiments [2][3][4] (column 8, Table I). Over the temperature range considered AH was found to be 42.0 ± 0.7 kJ moh1.…”

“…between the chemical shift of a tertiary phosphine, <5f, and the change in chemical shift upon coordination to a metal, . [1][2][3] The coordination shift of a tertiary phosphine can therefore be predicted from the equation The 31P chemical shifts of a number of phosphorus chelate complexes have been reported recently which cannot be predicted from the = + B relationship.4"7 This was first explained on the basis of ring strain; however, examination of four-, five-, and six-membered rings revealed a substantially larger degree of deshielding for the five-membered analogs. 6 We wish herein to compile and compare 31P chemical shift data for three types of phosphorus chelate complexes that exhibit such unusual deshielding effects.…”

Tris(dithiocarbamato) complexes of manganese(II), manganese(III), and manganese(IV). Electrochemical study

“…No precipitation of Mn(Pyrr(dtc))2 occurs before the 1:3 end point. The titration data are summarized by the following processes Mn2+ + 3[Pyrr(dtc)]" -> [Mn(Pyrr(dtc))3]' (7) 2[Mn(Pyrr(dtc))3]" + Mn2+ -* 3Mn(Pyrr(dtc))2 (8) There is no evidence for further degradation of Mn(Pyrr-(dtc))2 to a 1:1 species although this could be masked by solubility and kinetic considerations.…”

Thio derivatives of 1,3-diketones and their metal complexes. Dithiomalonamide and its nickel(II), Palladium(II), and platinum(II) derivatives

“…In this respect, the behavior of dithiomalonamide contrasts with that of O-ethyl thioacetothioacetate14 and of metal complexes of dithioacetylacetone. 9,11,12,26 a peak at m/e 101 and a metastable ion at m/e ~76 establish that the parent ion decays via loss of SH• behavior at a dropping-mercury electrode (dme) in acetone.…”