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EnglishThe 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.
| Titolo: | Bis(Diphenylphospino)methane-substituted Products from (m3-CCH3)Co3(CO)9 | |
| Autori Riconosciuti: | ||
| Autori: | Aime, Silvio; Botta, Mauro; Gobetto, Roberto; Osella, Domenico | |
| Data di pubblicazione: | 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. | |
| Volume: | 320 | |
| Pagina iniziale: | 229 | |
| Pagina finale: | 237 | |
| Digital Object Identifier (DOI): | 10.1016/S0022-328X(00)98979-4, | |
| Parole Chiave: | DPPM; cobalt; Cluster; ligand substitution | |
| Rivista: | JOURNAL OF ORGANOMETALLIC CHEMISTRY | |
| Appare nelle tipologie: | 03A-Articolo su Rivista |
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