Physical Inorganic Chemistry
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ChemInform Abstract: Two Scandium Iodide Carbides Containing Dicarbon Units within Scandium Clusters: Sc6I11C2 and Sc4I6C2. Synthesis, Structure, and the Bonding of Dicarbon.
First published: September 22, 1987
Abstract
The title compounds have been prepared from ScI3, Sc strips, and graphite at 850 °C in sealed Nb containers.
ChemInform Abstract
The title compounds have been prepared from ScI3, Sc strips, and graphite at 850 °C in sealed Nb containers. Both compounds crystallize in space group P1, with Z=2 for Sc6I11C2 (I) and Z=4 for Sc4I6C2 (II). (I) contains discrete M6X12-type clusters, which are connected to pairs via four coordinated I atoms. The phase (II) consists of infinite chains of condensed clusters each containinga C2 unit, namely pairs of centric clusters of ∼ D2h symmetry that are connected via shared metal edges by a distorted-trigonal-prismatic cluster. The bonding in (I) is discussed on the basis of the results of extended Hückel calculations.
