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[(Me 3 Si)Si] 3 EtGe 9 Pd(PPh 3 ), a Pentafunctionalized Deltahedral Zintl Cluster: Synthesis, Structure, and Solution Dynamics
Author(s) -
Li Feng,
MuñozCastro Alvaro,
Sevov Slavi C.
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201603374
Subject(s) - cluster (spacecraft) , square antiprism , crystallography , atom (system on chip) , germanium , transition metal , chemistry , reactivity (psychology) , metal , single crystal , rhodium , silicon , materials science , catalysis , molecule , oxygen atom , medicine , biochemistry , alternative medicine , organic chemistry , pathology , computer science , embedded system , programming language
Abstract The title compound, which has a ten‐atom deltahedral cluster core of Ge 9 Pd, was synthesized through insertion of Pd(PPh 3 ) into the tetrasubstituted nona‐germanium cluster [(Me 3 Si)Si] 3 EtGe 9 through a reaction of the latter with Pd(PPh 3 ) 4 . This first reaction of neutral tetrasubstituted nine‐atom clusters shows that they retain reactivity despite their neutral charge. The Ge 9 Pd core is the first that incorporates a 5‐connected transition metal other than from Group VI, a noble metal in this case. Single‐crystal X‐ray diffraction shows that the ten‐atom core is a closo ‐cluster with the expected shape of a bicapped square antiprism. 1 H and 13 C NMR spectroscopy show that, in contrast to the parent tetra‐substituted [(Me 3 Si)Si] 3 EtGe 9 , the new compound does not exhibit dynamics. Relativistic DFT calculations are used to explain the differences.