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- W2062373500 abstract "The compounds [Rh(η-C5H5)(dppm)(CO)](2), [Rh(η-C5H5)(dppe)](3), and [Rh(η-C5H5)(dppp)](4) were obtained from the reactions of [Rh(η-C5H5)(CO)2](1) with bis(diphenylphosphino)methane (dppm), 1,2-bis(diphenylphosphino)ethane (dppe), and 1,3-bis(diphenylphosphino) propane (dppp) respectively. The X-ray structure determination of (2) shows it to crystallize in the space group P21/n with unit-cell dimensions a= 13.734(4), b= 9.771(3), c= 20.440(8)A, β= 103.9(1)°, and Z= 4. R′= 0.05 for 2 864 observed reflections. Some relevant bond distances are Rh–(centroid of C5H5 ring)= 1.932, Rh–P = 2.238(2), and Rh–C(carbonyl)= 1.806(8)A. The bonding of the dppm ligand is, unusually, unidentate to the metal. The reactions of (2), (3), (4), and of the previously reported complex [{Rh(η-C5H5)(CO)}2(µ-dppb)](6)[dppb = 1,4-bis(diphenylphosphino) butane], with the electrophilic agents H+ and Me+ have been studied. Complex (3) reacts with HBF4 to give the cationic hydride [Rh(η-C5H5)H(dppe)]BF4(5); in the same reaction (4) and (6) gave unstable products. The protonic attack of HCl on (3), (4), and (6) results in the formation of compounds devoid of co-ordinated cyclopentadienyl ion. The binuclear complex [{Rh(CO)(µ-Cl)}2(µ-dppb)](7) was the product of the reaction of (6) with HCl; for this reaction a possible mechanism is proposed. The reactions of HCl with (3) and (4) are more complex and mixtures containing [{Rh(P–P)Cl}n] and the rhodium(III) hydride [{RhH(P–P)Cl2}n](n= 1 or 2, P–P = dppe or dppp) were isolated. The compound [{Rh(dppe)Cl}2] was formed by the reaction of (5) with [AsPh4]Cl. The electrophilic attack of Mel on (2) takes place either at the metal or at the unco-ordinated phosphorus atom of dppm and the reaction product is [Rh(η-C5H5)(COMe)I(Ph2PCH2PMePh2)]I. Mel reacts with (3) and (4) to give [Rh(η-C5H5)Me(dppe)]I and [Rh(η-C5H5)Me(dppp)]I, which are very unstable in solution." @default.
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- W2062373500 date "1983-01-01" @default.
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- W2062373500 title "η5-Cyclopentadienylrhodium(I) complexes containing diphosphines and their reactions with the electrophiles H+and Me+. Crystal and molecular structure of [Rh(η-C5H5)(CO)(Ph2PCH2PPh2)], a complex with a unidentate bis(diphenylphosphino)methane ligand" @default.
- W2062373500 doi "https://doi.org/10.1039/dt9830000433" @default.
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