155504-10-2

Upstream product

• 3132-99-8 m-bromobenzoic aldehyde 
• 36901-75-4 (2-bromobenzyl)triphenylphosphonium bromide 
• 591-18-4 1-Bromo-3-iodobenzene 
• 2039-88-5 2-bromostyrene 
• 155504-17-9 cis-1-(2-bromophenyl)-2-(3-bromophenyl)ethene 
• 95902-10-6 (3-bromobenzyl)(triphenyl)phosphonium bromide 
• 6630-33-7 ortho-bromobenzaldehyde 
• 603-35-0 triphenylphosphine 
• 3433-80-5 1-Bromo-2-bromomethyl-benzene 

Downstream Products

• 155504-08-8 trans-1-<2-(3,5-di-tert-butyl-1-hydroxy-4-oxocyclohexa-2,5-dienyl)phenyl>-2-<3-(3,5-di-tert-butyl-1-hydroxy-4-oxocyclohexa-2,5-dienyl)phenyl>ethene 

Relevant academic research and scientific papers

Ferromagnetic spin alignment in head-to-tail coupled oligo(1,4-phenyleneethynylene)s and oligo(1,4-phenylenevinylene)s bearing pendant p-phenylenediamine radical cations

The intramolecular and long-range ferromagnetic coupling between p-phenylenediamine radical cations in head-to-tail coupled oligo(1,4-phenyleneethynylene)s and oligo(1,4-phenylenvinylene)s between neighbors and next-nearest neighbors is described. UV/vis/near-IR experiments show that the radical cations are localized in the pendant p-phenylenediamine units of the conjugated oligomers. The ESR spectra of these oligo(1,4-phenyleneethynylene) and oligo(1,4-phenylenvinylene) di(radical cation)s are consistent with those of a triplet state. A linear behavior is observed for the doubly integrated ESR intensity of the ΔM(s) = ±1 and ΔM(s) = ±2 signals with the inverse temperature (I ~ 1/T), consistent with Curie's law. This behavior indicates a triplet ground-state diradical with a large triplet-singlet energy gap or possibly a degeneracy of singlet and triplet states.

SULFURIC ACID ESTERS OF SUGAR ALCOHOLS

The present invention is concerned with novel sulfuric acid esters of sugar alcohols and sugar alcohol-like compounds of the formula STR1 Also described are methods for the treatment and/or prophylaxis of arteriosclerotic changes in the vascular wall as well as a process for the manufacture of the compounds of formula I and their salts.

MAGNETIC COUPLING BETWEEN TWO PHENOXYL RADICALS ATTACHED TO THE PHENYL RINGS OF CIS- AND TRANS-STILBENES

Magnetic coupling between two sterically protected phenoxyl radicals through the cis- and trans-stilbene chromophores was studied by means of their EPR fine structures.While the zero-field splitting parameters D, which are governed by the magnitude of dip

Semiempirical Investigation of Stilbene-Linked Diradicals and Magnetic Study of Their Bis(N-tert-butylnitroxide) Variants

The electronic states of open-shell stilbene diradicals were studied.Previously used semiempirical MO-CI methods were applied to stilbenes having dimethylene, dioxyl, and dinitroxide centers in o,o'-, o,m'-, o,p'-, m,m'-, m,p'-, and p,p'-substitution patterns, and the various singlet-triplet energy gaps were computed to predict qualitative ground state spin multiplicities.Singlet and triplet spin states were essentially degenerate in the m,m'-isomers of disjoint connectivity, while nondisjoint o,m'- and m,p'-isomers had triplet computed ground states.Nitroxide-based diradicals showed considerably smaller computational exchange coupling energies than did other diradicals models studied.As a tests of these computations, stilbenes with two N-tert-butyl nitroxide groups at the o,m'-, m,m'-, and m,p'-positions were prepared, and their magnetic properties were studied by ESR and magnetic susceptibility measurements.The m,m'- and m,p'-isomers were found experimentally to have singlet and triplet ground states, respectively, in accord with the qualitative computed predictions.