2,2-Diphenyl­benzo[c]quinoline-1-ox­yl

In the title compound, C25H18NO, a stable phenanthridinic nitroxide, the ring containing the nitroxide function assumes a twist-boat conformation and the dihedral angle formed by adjacent benzene rings is 21.78 (5)°. The phenyl substituents at position 2 are approximately orthogonal to each other, forming a dihedral angle of 81.04 (4)°. The crystal structure is stabilized by an intra­molecular C—H⋯O hydrogen bond and by C—H⋯π inter­actions

Chain transfer to solvent in the radical polymerization of structurally diverse acrylamide monomers using straight-chain and branched alcohols as solvents

Chain transfer to solvent in conventional radical polymerizations of N-tert-butylacrylamide (TBAM) and N-(2-morpholin-4-ylethyl) acrylamide (MEA) in a range of alcohol solvents is investigated. Mayo analysis of polymerization of TBAM in linear alcohols (C-3-C-9) resulted in an approximately linear increase in chain transfer to solvent constant (C-tr,(S)) with the number of methylene (CH2) units in the solvent. The branched alcohol 3-methyl-3-pentanol gave the smallest C-tr,C-S (using Mayo analysis), and thus allowed attainment of higher molecular weights (MWs) in the nitroxide-mediated polymerizations (NMP) of TBAM. Overall, the data show that MEA is more prone to chain transfer to solvent than TBAM (higher C-tr,C-S), and further analysis of the conventional radical polymerization of MEA in 3-methyl-3-pentanol indicate chain transfer to monomer may also be occurring. The first controlled/ living polymerizations of MEA are detailed with chain transfer having a greater impact on maximum achievable MWs in NMP in comparison to TBAM

Visible-light unmasking of heterocyclic quinone methide radicals from alkoxyamines

Correction for 'Visible-light unmasking of heterocyclic quinone methide radicals from alkoxyamines' by Patrick Kielty et al., Chem. Commun., 2019, 55, 14665-14668, DOI: 10.1039/C9CC08261A

Ly Awa : Le Sénégal dans la presse française : 1956-1968. Un traitement privilégié ?

Guillaneuf Raymond. Ly Awa : Le Sénégal dans la presse française : 1956-1968. Un traitement privilégié ?. In: Outre-mers, tome 92, n°346-347, 1er semestre 2005. La santé et ses pratiques en Afrique, sous la direction de Karine Delaunay. pp. 344-346

L'Année africaine 1972

Guillaneuf Raymond. L'Année africaine 1972. In: Revue française d'histoire d'outre-mer, tome 64, n°234, 1er trimestre 1977. pp. 114-115

Ly Awa : Le Sénégal dans la presse française : 1956-1968. Un traitement privilégié ?

Guillaneuf Raymond. Ly Awa : Le Sénégal dans la presse française : 1956-1968. Un traitement privilégié ?. In: Outre-mers, tome 92, n°346-347, 1er semestre 2005. La santé et ses pratiques en Afrique, sous la direction de Karine Delaunay. pp. 344-346