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Synthesis and Crystal Structure of the Highly Reduced Metalate Ba 3 [Ir(CN) 3 ]
Author(s) -
Jach Franziska,
Höhn Peter,
Senyshyn Anatoliy,
Ruck Michael,
Kniep Rüdiger
Publication year - 2012
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201200150
Subject(s) - iridium , isostructural , crystallography , crystal structure , microcrystalline , ion , cobalt , materials science , raman spectroscopy , pegmatite , chemistry , chalcogenide , neutron diffraction , inorganic chemistry , mineralogy , catalysis , physics , metallurgy , biochemistry , organic chemistry , optics
Greenish gray microcrystalline powders of Ba 3 [Ir(CN) 3 ] were prepared from pressed pellets of mixtures of Ba 2 N, iridium, NaCN, and graphite at 1020 K under inert conditions. Neutron diffraction data at 293 K revealed the crystal structure of the Ir compound ( P 6 3 / m (no. 176), a = 9.2277(8) Å, c = 5.7878(6) Å) to be isostructural to Sr 3 [Co(CN) 3 ] and Ba 3 [Co(CN) 3 ]. The trigonal‐planar complex [Ir 3 (CN) 3 ] 6– is surrounded by nine Ba 2+ ions forming a tricapped trigonal prism. Elongated C–N distances and low vibrational frequencies in the highly reduced iridium complex are similar to those observed in the corresponding cobalt compounds.