The role of solvent additive in polymer crystallinity during physical supercritical fluid deposition

Abstract

We investigated the self-assembly of polymers in supercritical fluids by depositing thin films of isotactic polypropylene from n-pentane:acetone solutions and studying their structure. The deposition technique leverages a maximum in...

α-Selective C(sp3)–H Thio/Selenocyanation of Ketones with Elemental Chalcogen

“…Column chromatography was performed using EM silica gel 60 (300−400 mesh). 1 H NMR, 13 C NMR, and 19 F NMR spectra were measured on a 500 MHz Bruker AVANCE spectrometer (500 MHz for 1 H, 125 MHz for 13 C, and 470 MHz for 19 F) using CDCl 3 as the solvent with tetramethylsilane (TMS) as the internal standard at room temperature. Chemical shifts were reported in ppm.…”

“…1-Phenyl-2-thiocyanatopropan-1-one (2). 19 The general procedure was followed (80 °C, 24 h), and 10/1 petroleum ether/EtOAc was used as the eluant to obtain a yellow solid (56.2 mg, 98% yield). 1 H NMR (400 MHz, CDCl 3 ): δ 7.98−7.96 (m, 2H), 7.72−7.68 (m, 1H), 7.59−7.55 (m, 1H), 5.12 (q, J = 7.1 Hz, 1H), 1.89 (d, J = 7.1 Hz, 3H); 13 C{ 1 1-(4-Fluorophenyl)-2-thiocyanatopropan-1-one (3).…”

“…1 1-Phenyl-2-thiocyanatoethan-1-one (7). 19 The general procedure was followed (70 °C, 24 h), and 10/1 petroleum ether/EtOAc was used as the eluant to obtain a yellow solid (35.0 mg, 66% yield). 1 1-(4-Fluorophenyl)-2-thiocyanatoethan-1-one (8).…”