Chemistry:Chloro(tetrahydrothiophene)gold(I)

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Chloro(tetrahydrothiophene)­gold(I)
Chloro(tetrahydrothiophene)gold(I).png
Chloro(tetrahydrothiophene)gold(I)-from-xtal-1993-CM-3D-balls.png
Identifiers
3D model (JSmol)
ChemSpider
Properties
C4H8AuClS
Molar mass 320.58 g·mol−1
Appearance White to off-white powder
Structure
orthorhombic
Pmc21, No. 26
a = 6.540(1) Å, b = 8.192(1) Å, c = 12.794(3) Å
4
Related compounds
Related compounds
chloro(dimethyl sulfide)gold(I), bromo(tetrahydrothiophene)gold(I)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Chloro(tetrahydrothiophene)gold(I), abbreviated (tht)AuCl, is a coordination complex of gold. Like the dimethyl sulfide analog, this compound is used as an entry point to gold chemistry. The tetrahydrothiophene ligand is labile and is readily substituted with other stronger ligands.

Preparation

This compound may be prepared by the reduction of tetrachloroauric acid with tetrahydrothiophene:[1]

HAuCl
4
+ 2 SC
4
H
8
+ H
2
O → AuCl(SC
4
H
8
) + OSC
4
H
8
+ 3 HCl

The complex adopts a linear coordination geometry, as is typical of many gold(I) compounds. It crystallizes in the orthorhombic space group Pmc21 with a = 6.540(1) Å, b = 8.192(1) Å, c = 12.794(3) Å with Z = 4 formula units per unit cell. The bromide congener is isostructural.[2]

It is somewhat less thermally labile compared to (Me2S)AuCl, but is still sensitive to temperature and light.

References

  1. Uson, R.; Laguna, A.; Laguna, M. (2007). "(Tetrahydrothiophene)Gold(I) or Gold(III) Complexes". Inorg. Synth. 26: 85–91. doi:10.1002/9780470132579.ch17. ISBN 9780470132579. 
  2. Ahrland, Sten; Dreisch, Klaus; Norén, Bertil; Oskarsson, Ake (1993). "Metal-metal interactions in chain compounds of gold(I): syntheses and crystal structures of chlorotetrahydrothiophenegold(I), bromotetrahydrothiophenegold(I) and iodotetrahydroselenophenegold(I)". Materials Chemistry and Physics 35 (3–4): 281–289. doi:10.1016/0254-0584(93)90144-B.