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- W1540576506 abstract "Abstract Activation parameters have been obtained for the chelation of Mo(CO)5dpe (dpe = Ph2PCH2CH2PPh2) and of Mo(CO)5dmpe (dmpe = Me2PCH2CH2PMe2) to give cis-Mo(CO)4dpe and cis-Mo(CO)4dmpe respectively. The results are compared with those for the analogous chromium complexes and show that the enthalpy contribution determines the more rapid chelation in the molybdenum complexes. The preparation and properties of the chelate-bridged hetero-metallic complex (CO)5ModmpeMn(CO)4Br are reported. The reaction between Et4N[Mn(CO)4X2] (X = Cl, Br) and bidentate ligands dpe, dmpe and ape (ape = Ph2PCH2CH2AsPh2) in the presence of either silver(I) tetrafluoroborate or Et3OBF4 produces cis-Mn(CO)4X(bidentate) which is identified by infrared and mass spectrometry. At room temperature the Mn(CO)4X(bidentate) complex is rapidly converted to the chelated fac-Mn(CO)3X(bidentate) complex. The chelation process is approximately 104 times more rapid than in the isoelectronic chromium(O) complexes. The preparation and characterisation of fac-Mn(CO)3Br(dmpe), cis-Mn(CO)4Br(PMe3) and fac-Mn(CO)3Br(PMe3)2 are reported." @default.
- W1540576506 created "2016-06-24" @default.
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- W1540576506 date "1974-11-12" @default.
- W1540576506 modified "2023-09-24" @default.
- W1540576506 title "ChemInform Abstract: STUDIES OF CHELATION PART 2, PHOSPHINE COMPLEXES OF MOLYBDENUM AND MANGANESE" @default.
- W1540576506 cites W4232684074 @default.
- W1540576506 doi "https://doi.org/10.1002/chin.197445373" @default.
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