Synthesis
and Characterization of Coinage Metal Aluminum
Sulfur Species
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Abstract
The
synthesis of heterobimetallic cluster with the Al–S–M
(M = Cu and Ag) structural unit has been realized for the first time
by the reaction of aluminum-dithiol LAl(SH)<sub>2</sub> (L = HC[C(Me)N(Ar)]<sub>2</sub>, Ar = 2,6-<i>i</i>Pr<sub>2</sub>C<sub>6</sub>H<sub>3</sub>) with (MesCu)<sub>4</sub> and (MesAg)<sub>4</sub> (Mes =
2,4,6-Me<sub>3</sub>C<sub>6</sub>H<sub>2</sub>), respectively. The
isolated clusters exhibit core structures of Al<sub>2</sub>Cu<sub>4</sub>S<sub>4</sub> and Al<sub>4</sub>Ag<sub>8</sub>S<sub>8</sub>, respectively. During the formation of the [LAl(SAg)<sub>2</sub>]<sub>4</sub>, a side product of LAlS<sub>6</sub> is formed. However,
the reaction of LAl(SH)<sub>2</sub> with excess of sulfur and (MesAg)<sub>4</sub> resulted in the formation of LAlS<sub>4</sub> as the only
product soluble in organic solvents. Both of them represent rare examples
of aluminum polysulfides. All compounds were characterized by spectroscopic
methods and single crystal X-ray diffraction studies
