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A Missing Structural Link in the Werner Series of Cobalt(III) Complexes: The Crystal Structure of Δ‐(–) 589 ‐Tris(ethylenediamine)cobalt(III) Iodide Monohydrate
Author(s) -
Grant Gregory J.,
Noll Bruce C.,
Lee John P.
Publication year - 2019
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.201900087
Subject(s) - ethylenediamine , orthorhombic crystal system , cobalt , iodide , octahedron , crystallography , chemistry , crystal structure , tris , absolute configuration , molecule , chirality (physics) , stereochemistry , inorganic chemistry , physics , organic chemistry , biochemistry , nambu–jona lasinio model , chiral symmetry breaking , quantum mechanics , quark
Alfred Werner's historic resolution of Δ/Λ‐[Co(en) 3 ] 3+ (where en = ethylenediamine) provided conclusive evidence for octahedral geometry coordination compounds and the first example of chirality in an inorganic molecule. Herein, we report the historically significant structure and absolute configuration of Δ‐(–) 589 ‐tris(ethylenediamine) cobalt(III) iodide monohydrate, Δ‐[Co(en) 3 ]I 3 ( 1 ), the missing crystallographic piece in the series of [Co(en) 3 ] 3+ complexes. Complex 1 crystallizes in an orthorhombic space group P 2 1 2 1 2 1 with unit cell dimensions of a = 8.4016(10), b = 11.2573(13), c = 18.825(2) Å, V = 1780.4(4) Å 3 , and Z = 4. The absolute configuration of the complex cation [Co(en) 3 ] 3+ is Δ and the en ligands adopt a λλδ configuration.