TY - JOUR
T1 - Binuclear Binuclear complexes of rhodium or copper with pentamethylcyclopentadienyltricarbonyltungsten. Crystal structure of (η5-C5Me5)(CO)W(μ-CO)2Rh(PPh3)2
AU - Lindsell, W. Edward
AU - McCullough, Kevin J.
AU - Plancq, Sabine
PY - 1995/4/5
Y1 - 1995/4/5
N2 - The reaction of Li[W(CO)3Cp{black star}] (Cpp{black star} = ?5-C5Me5) with [RhCl(PPh3)3] affords [Cp{black star}(CO)W(µ-CO)2Rh(PPh3)2],3, which has been structurally characterised by an X-ray diffraction study, and shown to contain a short WRh bond of 2.5820(6) Å and two semi-bridging CO ligands. Variable temperature 31P{1H} NMR spectra show that complex 3 is fluxional in solution and undergoes intramolecular interchange of inequivalent PPh3 with ?G‡ca. 30 kJ mol-1 at -105°C. Reaction of Li[W(CO)3Cp{black star}] with [RhCl(PPh3)3] gives the mono-triphenylphosphine complex [Cp{black star}W(CO)3Cu(PPh3)], 4a, which has the same valence electron count as 3 and has been characterised analytically and by IR and NMR spectroscopy. Evidence for a related molybdenum-copper species, 4b, is also presented. The structural and spectroscopic properties of new products are discussed in relation to those of related heterobinuclear compounds. © 1995.
AB - The reaction of Li[W(CO)3Cp{black star}] (Cpp{black star} = ?5-C5Me5) with [RhCl(PPh3)3] affords [Cp{black star}(CO)W(µ-CO)2Rh(PPh3)2],3, which has been structurally characterised by an X-ray diffraction study, and shown to contain a short WRh bond of 2.5820(6) Å and two semi-bridging CO ligands. Variable temperature 31P{1H} NMR spectra show that complex 3 is fluxional in solution and undergoes intramolecular interchange of inequivalent PPh3 with ?G‡ca. 30 kJ mol-1 at -105°C. Reaction of Li[W(CO)3Cp{black star}] with [RhCl(PPh3)3] gives the mono-triphenylphosphine complex [Cp{black star}W(CO)3Cu(PPh3)], 4a, which has the same valence electron count as 3 and has been characterised analytically and by IR and NMR spectroscopy. Evidence for a related molybdenum-copper species, 4b, is also presented. The structural and spectroscopic properties of new products are discussed in relation to those of related heterobinuclear compounds. © 1995.
KW - Carbonyl
KW - Copper
KW - Fluxionality
KW - Pentamethylcyclopentadienyl
KW - Rhodium
KW - Tungsten
UR - http://www.scopus.com/inward/record.url?scp=0002601007&partnerID=8YFLogxK
M3 - Article
SN - 0022-328X
VL - 491
SP - 275
EP - 281
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
IS - 1-2
ER -