Cobalt tris(diethyldithiocarbamate)

Last updated
Cobalt tris(diethyldithiocarbamate)
Co(Et2NCS2)3.svg
Names
IUPAC name
Tris(diethyldithiocarbamato)cobalt
Other names
Cobalt diethyl dithiocarbamate; cobalt(3+);N,N-diethylcarbamodithioate
Identifiers
3D model (JSmol)
ChemSpider
PubChem CID
Properties
[(C2H5)2NCS2]3Co
Molar mass 416.5 g/mol
Appearancegreen solid
Density 1.43 g/cm3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Cobalt tris(diethyldithiocarbamate) is the coordination complex of cobalt with diethyldithiocarbamate with the formula Co(S2CNEt2)3 (Et = ethyl). It is a diamagnetic green solid that is soluble in organic solvents. [1]

Contents

Synthesis, structure, bonding

Cobalt tris(dithiocarbamate)s are typically are prepared by air-oxidation of mixtures of dithiocarbamate salts and a cobalt(II) nitrate. [2] Cobalt tris(diethyldithiocarbamate) is an octahedral coordination complex of low-spin Co(III) with idealized D3 symmetry. The Co-S distances are 267 pm. [3]

Reactions

Oxidation of Co(Et2dtc)3 occurs at mild potentials to give the cobalt(IV) derivative. [2]

Treatment of Co(Et2dtc)3 with fluoroboric acid results in the removal of 0.5 equiv of ligand giving a binuclear cation: [4]

2 Co(Et2dtc)3 + HBF4 → [Co2(Et2dtc)5]BF4 + "Et2NdtcH"

See also

Related Research Articles

Cobalt(II) chloride

Cobalt(II) chloride is an inorganic compound of cobalt and chlorine, with the formula CoCl
2
. It is a sky blue crystalline solid.

Phenanthroline

Phenanthroline (phen) is a heterocyclic organic compound. It is a white solid that is soluble in organic solvents. It is used as a ligand in coordination chemistry, forming strong complexes with most metal ions. It is often sold as the monohydrate.

Iron(III) acetate

Ferric acetate is the acetate salt of the coordination complex [Fe3O(OAc)6(H2O)3]+ (OAc is CH3CO2). Commonly the salt is known as "basic iron acetate". The formation of the red-brown complex was once used as a test for ferric ions.

Organoactinide chemistry

Organoactinide chemistry is the science exploring the properties, structure and reactivity of organoactinide compounds, which are organometallic compounds containing a carbon to actinide chemical bond.

Dithiocarbamate

A dithiocarbamate is a functional group in organic chemistry. It is the analog of a carbamate in which both oxygen atoms are replaced by sulfur atoms.

Transition metal dinitrogen complex

Transition metal dinitrogen complexes are coordination compounds that contain transition metals as ion centers the dinitrogen molecules (N2) as ligands.

High-valent iron

High-valent iron commonly denotes compounds and intermediates in which iron is found in a formal oxidation state > 3 that show a number of bonds > 6 with a coordination number ≤ 6. The term is rather uncommon for hepta-coordinate compounds of iron. It has to be distinguished from the terms hypervalent and hypercoordinate, as high-valent iron compounds neither necessarily violate the 18-electron rule nor necessarily show coordination numbers > 6. The ferrate(VI) ion [FeO4]2− was the first structure in this class synthesized. The synthetic compounds discussed below contain highly oxidized iron in general, as the concepts are closely related.

Metal bis(trimethylsilyl)amides

Metal bis(trimethylsilyl)amides are coordination complexes composed of a cationic metal with anionic bis(trimethylsilyl)amide ligands and are part of a broader category of metal amides.

Bromopentaamminecobalt(III) bromide

Bromopentaamminecobalt(III) bromide is the dibromide salt of the cobalt coordination compound with the formula [Co(NH3)5Br]2+. It is a purple, water-soluble solid. The analogous chloropentaamminecobalt(III) chloride is also well known.

Cobalt(III) nitrate is an inorganic compound with the chemical formula Co(NO3)3.

Iron tris(dimethyldithiocarbamate)

Iron tris(dimethyldithiocarbamate) is the coordination complex of iron with dimethyldithiocarbamate with the formula Fe(S2CNMe2)3 (Me = methyl). It is marketed as a fungicide.

Transition metal nitrile complexes

Transition metal nitrile complexes are coordination compounds containing nitrile ligands. Because nitriles are weakly basic, the nitrile ligands in these complexes are often labile.

Water oxidation catalysis

Water oxidation catalysis (WOC) is the acceleration (catalysis) of the conversion of water into oxygen and protons:

Transition metal pyridine complexes

Transition metal pyridine complexes encompass many coordination complexess that contain pyridine as a ligand. Most examples are mixed-ligand complexes. Many variants of pyridine are also known to coordinate to metal ions, such as the methylpyridines, quinolines, and more complex rings.

Transition metal isocyanide complexes

Transition metal isocyanide complexes are coordination compounds containing isocyanide ligands. Because isocyanide are relatively basic, but also good pi-acceptors, a wide range of complexes are known. Some isocyanide complexes are used in medical imaging.

Transition metal chloride complex Coordination complex

In chemistry, a transition metal chloride complex is a coordination complex that consists of a transition metal coordinated to one or more chloride ligand. The class of complexes is extensive.

Transition metal carboxylate complex

Transition metal carboxylate complexes are coordination complexes with carboxylate (RCO2) ligands. Reflecting the diversity of carboxylic acids, the inventory of metal carboxylates is large. Many are useful commercially, and many have attracted intense scholarly scrutiny. Carboxylates exhibit a variety of coordination modes, most common are κ1- (O-monodentate), κ2 (O,O-bidentate), and bridging.

Iron tris(diethyldithiocarbamate)

Iron tris(diethyldithiocarbamate) is the coordination complex of iron with diethyldithiocarbamate with the formula Fe(S2CNEt2)3 (Et = ethyl). It is a black solid that is soluble in organic solvents.

Transition metal dithiocarbamate complexes

Transition metal dithiocarbamate complexes are coordination complexes containing one or more dithiocarbamate ligand, which are typically abbreviated R2dtc-. Many complexes are known. Several homoleptic derivatives have the formula M(R2dtc)n where n = 2 and 3.

Marinella Mazzanti Italian chemist

Marinella Mazzanti is an Italian inorganic chemist specialized in coordination chemistry. She is a professor at EPFL and the head of the group of Coordination Chemistry at EPFL's School of Basic Sciences.

References

  1. D. Coucouvanis (2007). "The Chemistry of the Dithioacid and 1,1-Dithiolate Complexes". Progress in Inorganic Chemistry. 11: 233–371. doi:10.1002/9780470166123.ch4. ISBN   9780470166123.
  2. 1 2 Webster, Richard D.; Heath, Graham A.; Bond, Alan M. (2001). "Voltammetric, EPR and UV-VIS-NIR spectroscopic studies Associated with the Characterisation of Electrochemically Generated Tris(dithiocarbamato)cobalt(IV) Complexes in Dichloromethane". Journal of the Chemical Society, Dalton Transactions (21): 3189–3195. doi:10.1039/b104636p.
  3. Healy, PC; Connor, J. W.; Skelton, B. W.; White, A. H. (1990). "Alkyl Substituent Effects in Diamagnetic Dithiocarbamate Cobalt(III) and Nickel(II) Complexes". Australian Journal of Chemistry. 43 (6): 1083. doi:10.1071/CH9901083.
  4. Hendrickson, Alan R.; Martin, Raymond L.; Taylor, Donald (1975). "Synthesis and Properties of Dimeric Cobalt(III) Dithiocarbamate Complexes [Co2(R2dtc)5]+: X-Ray Structural Analysis of Pentakis(diethyldithiocarbamato)dicobalt(III) Tetrafluoroborate". Journal of the Chemical Society, Dalton Transactions (21): 2182. doi:10.1039/dt9750002182.