Affiliation:
1. Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20782, USA.
Abstract
The [As@Ni
12
@As
20
]
3–
ion was prepared from As
7
3–
and Ni(COD)
2
in ethylenediamine solutions and isolated as the Bu
4
P
+
salt (As, arsenic; Ni, nickel; COD, cyclooctadiene; Bu, butyl; P, phosphorus). The anion contains an icosahedral [Ni
12
(μ
12
-As)]
3–
fragment that resides at the center of an As
20
dodecahedral (fullerene) cage to give an onion-skin–like [As@Ni
12
@As
20
]
3–
cluster with
I
h
point symmetry. The icosahedron and pentagonal dodecahedron are reciprocal platonic solids, and the 32 surface atoms form a dimpled geodesic sphere composed of 60 triangular faces. In the gas phase, the [As@Ni
12
@As
20
]
3–
ion sequentiallyloses all 21 As atoms to form a series of Ni
12
As
21–
x
clusters where 0 ≤
x
≤ 21, inclusively.
Publisher
American Association for the Advancement of Science (AAAS)
Cited by
198 articles.
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