Nanosized (μ12-Pt)Pd164-xPtx(CO)72(PPh3)20 (x ≈ 7) Containing Pt-Centered Four-Shell 165-Atom Pd−Pt Core with Unprecedented Intershell Bridging Carbonyl Ligands: Comparative Analysis of Icosahedral Shell-Growth Patterns with Geometrically Related Pd145(CO)x(PEt3)30 (x ≈ 60) Containing Capped Three-Shell Pd145 Core

Autor:	Lawrence F. Dahl, Evgueni G. Mednikov, M. C. Jewell
Rok vydání:	2007
Předmět:	Icosahedral symmetry Chemistry Shell (structure) General Chemistry Icosidodecahedron Crystal structure Biochemistry Catalysis Crystallography Dodecahedron Colloid and Surface Chemistry Atom Cluster (physics) Molecule
Zdroj:	Journal of the American Chemical Society. 129:11619-11630
ISSN:	1520-5126 0002-7863
DOI:	10.1021/ja073945q
Popis:	Presented herein are the preparation and crystallographic/microanalytical/magnetic/spectroscopic characterization of the Pt-centered four-shell 165-atom Pd-Pt cluster, (mu(12)-Pt)Pd(164-x)Pt(x)(CO)(72)(PPh(3))(20) (x approximately 7), 1, that replaces the geometrically related capped three-shell icosahedral Pd(145) cluster, Pd(145)(CO)(x)(PEt(3))(30) (x approximately 60), 2, as the largest crystallographically determined discrete transition metal cluster with direct metal-metal bonding. A detailed comparison of their shell-growth patterns gives rise to important stereochemical implications concerning completely unexpected structural dissimilarities as well as similarities and provides new insight concerning possible synthetic approaches for generation of multi-shell metal clusters. 1 was reproducibly prepared in small yields (
Databáze:	OpenAIRE
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