Reversible Hydrocarbon Activation by Rhodium Phthalocyanine Dimer [(R8Pc)Rh]2 (R8Pc2- = Dianion of 1,4,8,11,15,18,22,25-Octa-n-pentylphthalocyanine)

Autor:	J. W. Rathke, M. J. Chen
Rok vydání:	1994
Předmět:	Ligand Dimer Organic Chemistry chemistry.chemical_element Resonance (chemistry) Photochemistry Medicinal chemistry Rhodium Homolysis Inorganic Chemistry chemistry.chemical_compound chemistry Chemical bond Phthalocyanine Physical and Theoretical Chemistry Group 2 organometallic chemistry
Zdroj:	Organometallics. 13:4875-4880
ISSN:	1520-6041 0276-7333
DOI:	10.1021/om00024a033
Popis:	We have synthesized four rhodium-phthalocyanine complexes: (R[sub 8]Pc)(C[sub 6]H[sub 5]CN)CIRh, [(R[sub 8]-Pc)(MeOH)[sub 2]Rh]Cl, [(R[sub 8]Pc)Rh][sub 2](1), and (R[sub 8]PcH)RhRh(R[sub 8]Pc)H (2). In this notation R[sub 8]Pc[sup 2[minus]] is the dianion of 1,4,8,11,15,18.,22,25-octa-n-pentylphthalocyanine. The Rh-Rh bonded dimer 1 reacts with H[sub 2] to give 2, and it activates the C-H bonds of toluene and the R[sub 8]Pc[sup 2[minus]] ligand at temperatures of 150[degrees]C. It also catalyzes the H-D exchange between the R[sub 8]Pc[sup 2[minus]] ligand and D[sub 2]O and between the ligand and toluene-d[sub s]. Although all of the H's of the R[sub 8]Pc[sup 2[minus]] ligand are activated only the benzylic H's of toluene are activated. A radical mechanism, initiated by homolysis of 1, is proposed for these reactions. 27 refs., 3 figs., 1 tab.
Databáze:	OpenAIRE
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