Misplaced Pages

Cobalt tris(diethyldithiocarbamate)

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Cobalt tris(diethyldithiocarbamate)
Names
IUPAC name Tris(diethyldithiocarbamato)cobalt
Other names Cobalt diethyl dithiocarbamate; cobalt(3+);N,N-diethylcarbamodithioate
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
PubChem CID
InChI
  • InChI=1S/3C5H11NS2.Co/c3*1-3-6(4-2)5(7)8;/h3*3-4H2,1-2H3,(H,7,8);/q;;;+3/p-3Key: JBNCRGZHNOJKHG-UHFFFAOYSA-K
SMILES
  • CCN(CC)C(=S).CCN(CC)C(=S).CCN(CC)C(=S).
Properties
Chemical formula 3Co
Molar mass 416.5 g/mol
Appearance green solid
Density 1.43 g/cm
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

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.

Synthesis, structure, bonding

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

Reactions

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

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

2 Co(Et2dtc)3 + HBF4 → BF4 + "Et2NdtcH"

See also

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. ^ 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.
Categories: