TY - JOUR
T1 - Crystal structure of [(1,2,3,4,11,12-η)-anthracene]tris(trimethylstannyl)cobalt(III)
AU - Brennessel, William W.
AU - Ellis, John E.
PY - 2014/10/4
Y1 - 2014/10/4
N2 - The asymmetric unit of the title structure, [Co(η6-C14H10){Sn(CH3)3}3], contains two independent molecules. Each anthracene ligand is η6-coordinating to a CoIII cation and is nearly planar [fold angles of 5.4 (3) and 9.7 (3)°], as would be expected for its behaving almost entirely as a donor to a high-oxidation-state metal center. The slight fold in each anthracene ligand gives rise to slightly longer Co - C bond lengths to the ring junction carbon atoms than to the other four. Each CoIII cation is further coordinated by three Sn(CH3)3 ligands, giving each molecule a three-legged piano-stool geometry. In each of the two independent molecules, the trio of SnMe3 ligands are modeled as disordered over two positions, rotated by approximately 30%, such that the C atoms nearly overlap. In one molecule, the disorder ratio refined to 0.9365 (8):0.0635 (8), while that for the other refined to 0.9686 (8):0.0314 (8). The molecules are well separated, and thus no significant intermolecular interactions are observed. The compound is of interest as the first structure report of an η6-anthracene cobalt(III) complex.
AB - The asymmetric unit of the title structure, [Co(η6-C14H10){Sn(CH3)3}3], contains two independent molecules. Each anthracene ligand is η6-coordinating to a CoIII cation and is nearly planar [fold angles of 5.4 (3) and 9.7 (3)°], as would be expected for its behaving almost entirely as a donor to a high-oxidation-state metal center. The slight fold in each anthracene ligand gives rise to slightly longer Co - C bond lengths to the ring junction carbon atoms than to the other four. Each CoIII cation is further coordinated by three Sn(CH3)3 ligands, giving each molecule a three-legged piano-stool geometry. In each of the two independent molecules, the trio of SnMe3 ligands are modeled as disordered over two positions, rotated by approximately 30%, such that the C atoms nearly overlap. In one molecule, the disorder ratio refined to 0.9365 (8):0.0635 (8), while that for the other refined to 0.9686 (8):0.0314 (8). The molecules are well separated, and thus no significant intermolecular interactions are observed. The compound is of interest as the first structure report of an η6-anthracene cobalt(III) complex.
KW - NMR data
KW - anthracene
KW - cobalt
KW - crystal structure
KW - flat-slipped coordination mode
KW - trimethylstannyl ligands
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U2 - 10.1107/S1600536814021709
DO - 10.1107/S1600536814021709
M3 - Article
C2 - 25484731
AN - SCOPUS:84908621330
SN - 1600-5368
VL - 70
SP - 312
EP - 315
JO - Acta Crystallographica Section E: Structure Reports Online
JF - Acta Crystallographica Section E: Structure Reports Online
IS - 11
ER -