The class of compounds (RCp)2MX2, where M is a group IV metal, Cp is cyclopentadienyl, R is an alkyl, and X is a halide, has been of continuing interest as precursors for olefin coordination polymerization catalysts. In this communication, we demonstrate that the technique of optically detected magnetic resonance (ODMR) reveals subtle differences in the composition of the frontier molecular orb...

An investigation on the effect of substituent at the 2-position of mono-substituted quinoxalines in the synthesis of di-substituted quinoxaline derivatives via nucleophilic substitution reactions, is reported. Di-substituted quinoxalines bearing aryl-alky, aryl-aryl, aryl-heteroaryl, aryl-alkynyl, and amino-alkyl substituents were prepared in moderate to good yields. 2-Monosubstituted quinoxali...

Carbenes. First examples of anionic cyclic (alkyl)(amino)carbenes bearing B(CN)3 or C2F5BF2 as N-substituents are reported by Udo Radius, Maik Finze et al. in their Research Article (e202300056). Their stereo-electronic parameters were also evaluated.

A series of model phenol carbonate ester prodrugs encompassing derivatives with fatty acid-like structures were synthesized and their stability as a function of pH (range 0.4 - 12.5) at 37 degrees C in aqueous buffer solutions investigated. The hydrolysis rates in aqueous solutions differed widely, depending on the selected pro-moieties (alkyl and aryl substituents). The observed reactivity dif...

The development of light-mediated methods for synthetic applications is increasingly attracting high interest. We present herein a new photochemical protocol the synthesis hydroxamic acids, which constitute an important class medicinal agents, mainly due to their anticancer properties. method mediated by UVA-light or sunlight and its key point generation charge transfer complex interaction 4-di...

a spectrophotometric method is used to determine the acidity constants of some derivatives of 9,10-anthraquinone in binary methanol-water mixtures at 25 °c. there is a linear inverse relationship between pka of all acids and the mole fraction of methanol in the mixed solvent. the influence of substituents in the molecular structure on the ionization constants is discussed.