1750-75-0

Upstream product

• 2403-55-6 4-(2-methyl-1-propenyl)morpholine 
• 122-04-3 4-nitro-benzoyl chloride 
• 2403-57-8 1-(2-methylprop-1-en-1-yl)pyrrolidine 

Downstream Products

• 10326-99-5 2-methyl-1-(4-nitrophenyl)propan-1-one 
• 56010-53-8 3-hydroxy-2,2-dimethyl-1-(4-nitrophenyl)propan-1-one 
• 309759-55-5 2,2-dimethyl-3-hydroxy-1-(4'-nitrophenyl)pent-4-yn-1-one 
• 309759-57-7 1,3,5-tris[2',2'-dimethyl-1',3'-dioxo-3'-(4''-nitrophenyl)propyl]benzene 
• 309759-56-6 2,2-dimethyl-1-(4'-nitrophenyl)pent-4-yne-1,3-dione 

Relevant academic research and scientific papers

EPR Spectral Determination of Electronic Substituent Effects on the D Values of Hydrocarbon Polyradicals (Quintet and Septet Spin States) Composed of Localized 1,3-Cyclopentanediyl Spin-Carrying Units Linked by 1,3-Di- And 1,3,5-Trimethylenebenzene Ferromagnetic Couplers

The parent and p-nitrophenyl-substituted diradicals D-3a,b (triplets), tetraradicals T-3a,b (quintets), and hexaradicals H-3a,b (septets) were photochemically generated in matrix-isolated form (toluene, 77 K) by successive denitrogenation of the trisazoalkanes 3a,b and EPR spectrally characterized. In these high-spin polyradicals the spin-spin interaction within the localized spin-carrying 1,3-cyclopentanediyl diradical unit is much stronger than within the cross-conjugated ferromagnetic coupling unit. Accordingly, a change of the electronic properties in the cyclopentanediyl unit affects decisively the D value of the whole polyradical. Therefore, the spin-accepting p-nitro group reduces the D value of the tetra- and hexaradical in the same amount as that of the diradical. Thus, irrespective of the spin multiplicity, the substituent stabilizes electronically the triplet (D-3a,b), quintet (T-3a,b), and septet (H-3a,b) species with equal efficacy.