The reaction between the alkylidyne cluster (μ3-CCH3)Co3(CO)9 and bis(diphenylphosphino) (dppm) gives two disubstituted stereoisomers of formula (μ3-CCH3)Co3(CO)7(μ-PPh2CH2PPh2) (I and II) and one monosubstituted product containing an uncoordinated phosphoryl group, (μ3-CCH3)Co3(CO)8[PPh2-CH2P(O)Ph2] (III). On heating in toluene under reflux, the kinetically favoured isomer I is transformed into the thermodynamically stable isomer II. Further reaction with a second molecule of dppm gives rise to two derivatives, (μ3-CCH3)CO3(CO)5(μ-dppm)2 (IV) and (μ3-CCH3)Co3(CO)6(μ-dppm)(dppm) (V). All the products have been characterized by IR and 13C and 31P NMR spectroscopy.

Bis(Diphenylphospino)methane-substituted Products from (m3-CCH3)Co3(CO)9

AIME, Silvio;BOTTA, Mauro;GOBETTO, Roberto;OSELLA, Domenico
1987

Abstract

The reaction between the alkylidyne cluster (μ3-CCH3)Co3(CO)9 and bis(diphenylphosphino) (dppm) gives two disubstituted stereoisomers of formula (μ3-CCH3)Co3(CO)7(μ-PPh2CH2PPh2) (I and II) and one monosubstituted product containing an uncoordinated phosphoryl group, (μ3-CCH3)Co3(CO)8[PPh2-CH2P(O)Ph2] (III). On heating in toluene under reflux, the kinetically favoured isomer I is transformed into the thermodynamically stable isomer II. Further reaction with a second molecule of dppm gives rise to two derivatives, (μ3-CCH3)CO3(CO)5(μ-dppm)2 (IV) and (μ3-CCH3)Co3(CO)6(μ-dppm)(dppm) (V). All the products have been characterized by IR and 13C and 31P NMR spectroscopy.
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DPPM; cobalt; Cluster; ligand substitution
Aime, Silvio; Botta, Mauro; Gobetto, Roberto; Osella, Domenico
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/112521
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