1994
DOI: 10.1002/anie.199408491
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[Mo57Fe6(NO)6O174(OH)3(H20)24]15−: A Highly Symmetrical Giant Cluster with an Unusual Cavity and the Possibility of Positioning Paramagnetic Centers on Extremely Large Cluster Surfaces

Abstract: Three hundred and twenty‐seven atoms with a combined molecular weight of 9250.9 Da make up the title compound, from which, as a cluster of the mesoscopic range, one can expect unusual material properties. A central O33 polyhedron (shown on the right) defines the unusual cavity of this giant cluster and points to interesting host‐guest chemistry. The cluster has been characterized by numerous analytical and spectroscopic methods.

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Cited by 80 publications
(37 citation statements)
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“…[14,15] The cluster anion of the corresponding compound with the lowest Mo content, (NH 4 ) 21 Figure 3 (bottom, left). [16,17] An interesting structural feature is the presence of six rather large cavities located on the outer sphere between the {Mo 17 } fragments (Figure 3, bottom). These are accessible to the coordination of further highly electrophilic metal ± oxygen fragments such as the {MoO} 4 groups, thus resultingÐin aqueous solution under specific experimental parameters (reducing conditions (NH 2 OH´HCl) and in the presence of an excess of molybdate which, according to the preparation method, is added to a solution containing 2 a)Ðin a step-by-step growth process which enables all species of the type {Mo 57x V 6 } (x 0 ± 6) to be be formed.…”
Section: Resultsmentioning
confidence: 98%
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“…[14,15] The cluster anion of the corresponding compound with the lowest Mo content, (NH 4 ) 21 Figure 3 (bottom, left). [16,17] An interesting structural feature is the presence of six rather large cavities located on the outer sphere between the {Mo 17 } fragments (Figure 3, bottom). These are accessible to the coordination of further highly electrophilic metal ± oxygen fragments such as the {MoO} 4 groups, thus resultingÐin aqueous solution under specific experimental parameters (reducing conditions (NH 2 OH´HCl) and in the presence of an excess of molybdate which, according to the preparation method, is added to a solution containing 2 a)Ðin a step-by-step growth process which enables all species of the type {Mo 57x V 6 } (x 0 ± 6) to be be formed.…”
Section: Resultsmentioning
confidence: 98%
“…All the incorporated {MoO} 4 groups (Mo 8; see Figure 3, top) which are located in the symmetry-equivalent cavities between the {Mo 17 } units are bound to three oxygen atoms also found in the parent anion 2 a. [16] Two of these are the (formerly terminal) oxygen atoms (O 1) of two neighbouring {Mo 17 Figure 3, top, and refs. [16,17]).…”
Section: Resultsmentioning
confidence: 99%
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