Abstract
Reactions of π-cyclopentadienylbis(triphenylphosphine)rhodium(I) (I) with alkyl halides, olefins, acetylenes, carbon disulfide and elementary sulfur have been investigated. Methyl iodide gives the oxidative-addition product [πC5H5 Rh(PPh3)2CH3]I but isopropyl iodide produces the alkyl substituted-cyclopentadienyl complex (π-i-C3H7C5H4)Rh(PPh3)I2. Under a nitrogen atmosphere, olefins and acetylenes give compounds of the composition π-C5H5 Rh(PPh3)(L) (L = CH2—CHCN, CH2—CHCO2CH3, CH3O2—CCOO2CH3).In the presence of air, however, complexes of the composition π-C5H5Rh(L)2 (L = CH2—CHCN, CH2—CHCO2CH3, CH2—C(CH3)CN) and π-C5H5Rh(L)3 (L = CH3O2 CC—CCO2 CH3, PhC—CCO2 CH3) are formed. The reaction of carbon disulfide or sulfur with (I) also gives the compounds π-C5H5Rh(PPh3)(L) (L = CS2, CS3, S5).
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