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Synthesis, X‐Ray Crystal Structure, and Fluxional Behaviour of fac ‐[Ru(CH 3 CO 2 ) 2 (PPh 3 ) 3 ] · 2 CH 3 CO 2 H
Author(s) -
Lindner Ekkehard,
Fawzi Riad,
Hiller Wolfgang,
Carvill Andrew,
McCann Malachy
Publication year - 1991
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19911241209
Subject(s) - chemistry , triclinic crystal system , norbornene , steric effects , crystallography , denticity , crystal structure , octahedron , norbornadiene , stereochemistry , bicyclic molecule , metal , catalysis , medicinal chemistry , polymerization , organic chemistry , polymer , biochemistry
[Ru 2 (μ‐O 2 CCH 3 ) 4 (O 2 CCH 3 )] reacts with excess triphenylphosphane in acetic acid to give fac ‐[Ru(O 2 CCH 3 ) 2 (PPh 3 ) 3 ] · 2CH 3 CO 2 H ( 1 ), which crystallizes in the triclinic space group P 1 − with Z=2. The three phosphane ligands are in the sterically congested facial configuration, and the distorted octahedral geometry around the metal is completed by a unidentate and chelating acetate. A variable temperature 31 P{ 1 H}‐NMR study of the complex in CH 2 Cl 2 showed the three phosphanes to be inequivalent at low temperature. On raising the temperature two separate coalescence processes are observed, ultimately making all of the phosphanes equivalent at room temperature. Complex 1 shows slight catalytic activity for the ring‐opening polymerization of bicyclo[2.2.1]hept‐2‐ene (norbornene).