Cobalt tris(diethyldithiocarbamate)

Cobalt tris(diethyldithiocarbamate)

Names
IUPAC name Tris(diethyldithiocarbamato)cobalt
Other names Cobalt diethyl dithiocarbamate; cobalt(3+);N,N-diethylcarbamodithioate
Identifiers
CAS Number	13963-60-5
3D model (JSmol)	Interactive image
ChemSpider	67160271
PubChem CID	13981569
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-3 Key: JBNCRGZHNOJKHG-UHFFFAOYSA-K
SMILES CCN(CC)C(=S)[S-].CCN(CC)C(=S)[S-].CCN(CC)C(=S)[S-].[Co+3]
Properties
Chemical formula	[(C2H5)2NCS2]3Co
Molar mass	416.5 g/mol
Appearance	green 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.

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 D₃symmetry. 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 → [Co₂(Et₂dtc)₅]BF₄ + "Et₂NdtcH"

See also

• Iron tris(diethyldithiocarbamate) - a related dimethyldithiocarbamate complex of iron