Thio anions metal complexes

A series of thio- 46 [51,168] and seleno-carboxylato complexes 47 [175] with tmns-configurations have been synthesized from the reaction of NiCl2(R3P)2 with alkali metal or 0-trimethylsilyl selenocarboxylates (Scheme 4). Telluro-carboxylato nickel complexes 48 Ni(RCOTe)2(R3P)2 are too labile to isolate, although their formation has been confirmed by their H, and Te NMR and IR spectral data [175]. The anionic thiocarboxylato nickel complex 49 is... 

In the anaerobic digester environment, one would thus expect sulfide reactions to dominate the Mo chemistry since the oxy-anions of the more reduced forms of this metal are relatively unstable (Tucker et al, 1997). For Facility J, total dissolved Mo concentration in the anaerobic digester supernatant was high (47 /rg/l Fig. 3) but the Mo(VI)/(total dissolved Mo) ratio was only 0.15, showing substantive formation of soluble species other than molybdate in the system. The dominant form of molybdenum present in the digester supernatant is unknown and is believed to be molybdenum sulfides. Formation of thio-complexes is also suggested by the ratio... 

Complexes with a d configuration contain a transition metal in the highest possible oxidation state. Since no valence electrons at the metal are left only LMCT transitions may occur (with the exception of ligand centered (LC) bands of complexes such as metalloporphyrins, see chapter 7 of this book). Typical examples are the tetrahedral oxo anions M04" and their thio... 

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