TY - JOUR
T1 - Synthesis and Structural Characterization of Trioxo(η5-ethyltetramethylcyclopentadienyl)rhenium, a Half-Sandwich Complex of Heptavalent Rhenium
AU - Okuda, Jun
AU - Herdtweck, Eberhardt
AU - Herrmann, Wolfgang A.
PY - 1988
Y1 - 1988
N2 - A single-crystal X-ray structure determination of trioxo(η5-ethyltetramethylcyclopentadienyl)rhenium(VII), (η5-C5Me4Et)ReO3 (1), has been performed. A three-legged piano-stool structure with the five-membered-ring ligand being centrally η5-bonded to the trioxorhenium fragment is found. While the Re-O bond lengths (166.4 (4)-171.6 (4) pm) are consistent with double bonds, the Re-C(ring) distances (238.5 (4)-243.0 (4) pm) are unusually long in comparison to those in any low-valent half-sandwich complexes of rhenium described in the literature. This effect stems from the pronounced trans influence of the three strongly π-donating terminal oxo ligands. Compound 1 crystallizes from dichloromethane/n-hexane in the orthorhombic space group P212121 with cell dimensions a = 849.6 (1) pm, b = 1310.2 (2) pm, c = 1075.3 (2) pm, V= 1197 × 106 pm3, and ρ(calcd) = 2.128 g·cm-3 (Z = 4).
AB - A single-crystal X-ray structure determination of trioxo(η5-ethyltetramethylcyclopentadienyl)rhenium(VII), (η5-C5Me4Et)ReO3 (1), has been performed. A three-legged piano-stool structure with the five-membered-ring ligand being centrally η5-bonded to the trioxorhenium fragment is found. While the Re-O bond lengths (166.4 (4)-171.6 (4) pm) are consistent with double bonds, the Re-C(ring) distances (238.5 (4)-243.0 (4) pm) are unusually long in comparison to those in any low-valent half-sandwich complexes of rhenium described in the literature. This effect stems from the pronounced trans influence of the three strongly π-donating terminal oxo ligands. Compound 1 crystallizes from dichloromethane/n-hexane in the orthorhombic space group P212121 with cell dimensions a = 849.6 (1) pm, b = 1310.2 (2) pm, c = 1075.3 (2) pm, V= 1197 × 106 pm3, and ρ(calcd) = 2.128 g·cm-3 (Z = 4).
UR - https://www.scopus.com/pages/publications/0001759776
U2 - 10.1021/ic00280a032
DO - 10.1021/ic00280a032
M3 - Article
AN - SCOPUS:0001759776
SN - 0020-1669
VL - 27
SP - 1254
EP - 1257
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 7
ER -