121393-39-3

Basic information

• Product Name: 5,10,15,20-tetra(2,4,6-trimethylphenyl)porphyrinate rhodium(II)
• Synonyms: 5,10,15,20-tetra(2,4,6-trimethylphenyl)porphyrinate rhodium(II)
• CAS NO: 121393-39-3
• Molecular Weight: 883.961
• Mol File: 121393-39-3.mol
• Article Data: 14

Chemical Properties

• CAS DataBase Reference: 5,10,15,20-tetra(2,4,6-trimethylphenyl)porphyrinate rhodium(II)(CAS DataBase Reference)
• NIST Chemistry Reference: 5,10,15,20-tetra(2,4,6-trimethylphenyl)porphyrinate rhodium(II)(121393-39-3)
• EPA Substance Registry System: 5,10,15,20-tetra(2,4,6-trimethylphenyl)porphyrinate rhodium(II)(121393-39-3)

Safety Data

• Hazardous Substances Data: 121393-39-3(Hazardous Substances Data)

Upstream product

• 124535-65-5 (5,10,15,20-tetramesitylporphyrinato)rhodium(III) hydride 
• 80937-33-3 oxygen 
• 161407-97-2 (5,10,15,20-tetramesitylporphyrinato)rhodium(III) chloride 
• 292-64-8 Cyclooctan 
• 7732-18-5 water 
• 85990-32-5 (5,10,15,20-tetra(2,4,6-trimethylphenyl)porphyrinato)rhodium(III) iodide 

Downstream Products

• 940002-33-5 (5,10,15,20-tetramesitylporphyrinato)bromo rhodium(III) 
• 150390-43-5 (tetrakis(2,4,6-trimethylphenyl)porphyrinato)rhodium(II)*pyridine 
• 823835-01-4 (pyridine)Rh(5,10,15,20-tetramesitylporphyrinato)CN 
• 915085-32-4 [Rh(meso-tetramesitylporphyrinato)(CN)(CNCH₂SiMe₃)] 
• 940002-34-6 Rh(5,10,15,20-tetramesitylporphyrinato)(CH₂CN) 
• 138856-85-6 tetramesitylporphyrin(⁽¹³⁾CO)rhodium(II) 
• 915085-31-3 (5,10,15,20-tetramesitylporphytinato)butylrhodium(III) 
• 124535-65-5 (5,10,15,20-tetramesitylporphyrinato)rhodium(III) hydride 
• 342790-12-9 (5,10,15,20-tetra(2,4,6-trimethylphenyl)porphyrinato)rhodium(III) ethyl 
• 940002-36-8 propyl(5,10,15,20-tetramesitylporphyrinato)rhodium(III) 
• 915085-30-2 [Rh(meso-tetramesitylporphyrinato)(CN)(CNtBu)] 
• 823834-99-7 Rh(5,10,15,20-tetramesitylporphyrinato)SiMe₃ 

Relevant articles and documents

Determination of Rh-C bond dissociation energy in methyl(porphyrinato)rhodium(III) complexes: A new application of photoacoustic calorimetry

The photolysis of RhCH3(ttp) and RhCH3(tmp) (ttp = 5,10,15,20-tetratolylporphyrin, tmp = 5,10,15,20-tetramesitylporphyrin) was studied in methanol at ambient temperature: the quantum yields for photolysis were determined to be 0.51 and 0.54, respectively, and the Rh-C bond dissociation energies (227 and 219 kJ mol-1, respectively) were measured by photoacoustic calorimetry, which were larger than those of Co-C bond.

Reduction of rhodium(III) porphyrin hydroxide to rhodium(II) porphyrin

Highly reactive rhodium(III) porphyrin hydroxides were formed from the ligand substitution of rhodium porphyrin halides in benzene and were rapidly reduced to rhodium(II) porphyrins and hydrogen peroxide. Thus hydroxide acted as the reducing agent. Oxidat

Metalloradical activation of methane

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Carbon-carbon bond activation of 2,2,6,6-tetramethyl-piperidine-1-oxyl by a RhII metalloradical: A combined experimental and theoretical study

Competitive major carbon-carbon bond activation (CCA) and minor carbon-hydrogen bond activation (CHA) channels are identified in the reaction between rhodium(II) meso-tetramesitylporphyrin [RhII(tmp)] (1) and 2,2,6,6-tetramethyl-piperidine-1-oxyl (TEMPO) (2). The CCA and CHA pathways lead to formation of [RhIII(tmp)Me] (3) and [RhIII(tmp)H] (5), respectively. In the presence of excess TEMPO, [RhII(tmp)] is regenerated from [RhIII(tmp)H] with formation of 2,2,6,6-tetramethyl- piperidine-1-ol (TEMPOH) (4) via a subsequent hydrogen atom abstraction pathway. The yield of the CCA product [RhIII(tmp)Me] increased with higher temperature at the cost of the CHA product TEMPOH in the temperature range 50-80°C. Both the CCA and CHA pathways follow second-order kinetics. The mechanism of the TEMPO carbon-carbon bond activation was studied by means of kinetic investigations and DFT calculations. Broken symmetry, unrestricted b3-lyp calculations along the open-shell singlet surface reveal a low-energy transition state (TS1) for direct TEMPO methyl radical abstraction by the RhII radical (SH2 type mechanism). An alternative ionic pathway, with a somewhat higher barrier, was identified along the closed-shell singlet surface. This ionic pathway proceeds in two sequential steps: Electron transfer from TEMPO to [RhII(por)] producing the [TEMPO] +[RhI(por)]- cation-anion pair, followed by net CH3+ transfer from TEMPO+ to RhI with formation of [RhIII(por)Me] and (DMPO-like) 2,2,6-trimethyl-2,3, 4,5-tetrahydro-1-pyridiniumolate. The transition state for this process (TS2) is best described as an SN2-like nucleophilic substitution involving attack of the dz2 orbital of [RhI(por)]- at one of the CMe-Cring σ* orbitale of [TEMPO] +. Although the calculated barrier of the open-shell radical pathway is somewhat lower than the barrier for the ionic pathway, R-DFT and U-DFT are not likely comparatively accurate enough to reliably distinguish between these possible pathways. Both the radical (SH2) and the ionic (S N2) pathway have barriers which are low enough to explain the experimental kinetic data.

Ligand effect on the rhodium porphyrin catalyzed hydrogenation of [2.2]paracyclophane with water: Key bimetallic hydrogenation

Rhodium porphyrin catalyzed hydrogenation of the aliphatic carbon-carbon σ-bond of [2.2]paracyclophane with water has been examined with a variety of tetraarylporphyrins and axial ligands. Mechanistic investigations show that RhIII(ttp)H, which can be derived from the reaction of [RhII(ttp)]2 with water without a sacrificial reductant, plays an important role in promoting bimetallic reductive elimination to give the hydrogenation product.

Metalloradical-catalyzed aliphatic carbon-carbon activation of cyclooctane

The aliphatic carbon-carbon activation of c-octane was achieved via the addition of Rh(ttp)H to give Rh(ttp)( n-octyl) in good yield under mild reaction conditions. The aliphatic carbon-carbon activation was RhII(ttp)- catalyzed and was very se