84174-79-8

Basic information

• Product Name: nitrido(5,10,15,20-tetraphenylporphyrinato)chromium(V)
• CAS NO: 84174-79-8
• Molecular Weight: 678.736
• Mol File: 84174-79-8.mol
• Article Data: 5

Chemical Properties

• CAS DataBase Reference: nitrido(5,10,15,20-tetraphenylporphyrinato)chromium(V)(CAS DataBase Reference)
• NIST Chemistry Reference: nitrido(5,10,15,20-tetraphenylporphyrinato)chromium(V)(84174-79-8)
• EPA Substance Registry System: nitrido(5,10,15,20-tetraphenylporphyrinato)chromium(V)(84174-79-8)

Safety Data

• Hazardous Substances Data: 84174-79-8(Hazardous Substances Data)

Upstream product

• 83438-07-7 azidochromium(III) meso-tetraphenylporphyrinate 
• 84206-82-6 nitridomanganese(V) octaethylporphyrinate 
• 28110-70-5 chloro(5,10,15,20-tetraphenylporphyrinato)chromium(III) 
• 84174-29-8 nitridochromium(V) octaethylporphyrinate 

Downstream Products

• 58344-06-2 chromium (d⁽³⁾)-tetraphenylporphyrin 
• 78833-34-8 (5,10,15,20-tetraphenylporphyrinato)oxochromium(IV) 
• 28110-70-5 chloro(5,10,15,20-tetraphenylporphyrinato)chromium(III) 
• 84174-29-8 nitridochromium(V) octaethylporphyrinate 

Relevant articles and documents

Inter-Metal Nitrogen Atom Transfer Reactions between Nitridochromium(V) and Chromium (III) Porphyrins

Reactions of nitridochromium(V) porphyrins with chromium(III) porphyrins resulted in reversible, inter-metal nitrogen atom transfer between the two chromium porphyrin complexes. The progress of these reactions was followed spectrophotometrically. Kinetic analysis of the spectral data obtained over time for a variety of substituted porphyrins showed the reactions to be first order in each of the reactants and second order overall. Equilibrium constants were computed from the spectral data and ranged from 0.56 to 2.1 for the reactions between nitridochromium(V) octaethylporphyrin and a series of chlorochromium(III) tetraphenylporphyrins possessing phenyl ring substituents. Forward rate constants were determined for this reaction series and ranged from 6.8 to 1420 M-11 s-1. Electron-withdrawing substituents enhanced the forward rates but diminished the equilibrium constants. It is proposed that the reactions proceed by nucleophilic attack of the nitridochromium porphyrin donor on the cationic chromium(III) porphyrin nitrogen atom acceptor facilitating a net, two-electron redox process mediated by a homobimetallic μ-nitrido intermediate.

Pyrolysis of Azidomanganese(III) Porphyrin Affording Nitridomanganese(V) Porphyrin

Azidomanganese(III) meso-tetraphenylporphyrin, MnIII(tpp)N3, in the solid state was pyrolyzed around 236 deg C to yield nitridomanganese(V) meso-tetraphenylporphyrin, MnV(tpp)N.

Synthesis and molecular structure of a nitrido(porphyrinato)chromiuin(V) complex

Irradiation of solutions of azido(5,10,15,20-tetra-p-tolylporphyrinato)chromium(III) in methylene chloride or benzene gave nitrido(5,10,15,20-tetra-p-tolylporphyrinato)chromium(V) (1) in yields of 59% and 82%, respectively. Solutions of 1 showed well-resolved EPR spectra at room temperature (g = 1.985, A53Cr = 2.85 mT, AN = 0.279 mT). The IR spectra of nitrido(5,10,15,20-tetra-p-tolylporphyrinato)chromium(V) (1) and 1-15N showed bands at 1017 and 991 cm-1, which were assigned to vCr≡14N and vCr≡15N, respectively. The molecular structure of 1·C6H6 indicated a chromium-nitrogen distance of 1.565 A?, with the chromium 0.42 A? above the mean plane of the pyrrole nitrogens. The periphery of the porphyrin ring was saddle-shaped with excursions 0.56 A? below and 0.29 A? above the plane of the pyrrole nitrogens.