Abstract
The paramagnetic rhodium phthalocyanine complex (RPc)(PMe3)2Rh (4) (RPc = dianion of 1,4,8,11,15,18,22,25-octa-n-pentylphthalocyanine) has been prepared by the reaction of trimethylphosphine (PMe3) with hydride-bridged and nonbridged rhodium phthalocyanine dimers. The reaction of the μ-hydrido complex (RPcH)Rh(μ-H)Rh(RPc) (5) (RPcH = RPc with one of its meso nitrogens protonated) with PMe3 at −10 °C produces (RPc)(PMe3)RhH (6), which further reacts with PMe3 to produce 4 and H2 at higher temperatures. If the solution of 6 is allowed to warm in the absence of free PMe3, H2 is also liberated and 6 is converted to an equal number of moles of 4 and [(RPc)Rh]2(PMe3) (7). In contrast, the reaction of 5 with pyridine (py) produces (RPc)(py)RhH (11), which does not react with additional pyridine. Alternatively, 4 is generated by the reaction of the Rh−Rh bonded dimer [(RPc)Rh]2 (1) with PMe3. In this reaction, the formation of 7 as an intermediate may be shown by the titration of 1 with PMe3. Complex 1 reacts wit...
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call