From Wikipedia, the free encyclopedia
In
chemistry
, a
thioxanthate
is an
organosulfur compound
with the formula RSCS
2
X. When X is an alkali metal, the thioxanthate is a salt. When X is a transition metal, the thioxanthate is a
ligand
, and when X is an organic group, the compounds are called thioxanthate esters. They are usually yellow colored compounds that often dissolve in organic solvents. They are used as precursors to some catalysts,
froth flotation
agents, and additives for lubricants.
Preparation and reactions
[
edit
]
The alkali metal thioxanthates are produced by treating a thiol with a base in the presence of
carbon disulfide
, as illustrated by the preparation of sodium ethyl thioxanthate:.
[1]
- EtSH + NaOH + CS
2
→ EtSCS
?
2
Na
+
+ H
2
O
Sodium ethyl thioxanthate is similar structurally to
sodium ethyl xanthate
.
Alkylation
of such thioxanthate anions gives thioxanthate esters, as illustrated by the preparation of ethyl methyl thioxanthate:
- EtSCS
?
2
Na
+
+ MeI → EtSCS
2
Me + NaI
Thioxanthate esters are also called esters of
trithiocarbonate
.
See also
[
edit
]
References
[
edit
]
- ^
Haiduc, I. "1,1-Dithiolato Ligands" in Comprehensive Coordination Chemistry II Edited by McCleverty, J. A.; Meyer, T. J 2004, volume 1, pp. 349-376.
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Hydrocarbons
(only C and H)
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Only
carbon
,
hydrogen
,
and
oxygen
(only C, H and O)
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Only one
element,
not being
carbon,
hydrogen,
or oxygen
(one element,
not C, H or O)
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Other
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