2953-56-2Relevant academic research and scientific papers
Regioselective and alternating copolymerization of carbonyl sulfide with racemic propylene oxide
Luo, Ming,Zhang, Xing-Hong,Du, Bin-Yang,Wang, Qi,Fan, Zhi-Qiang
, p. 5899 - 5904 (2013/09/02)
We report the first example of a regioregular and fully alternating poly (propylene monothiocarbonate) (PPMTC) from the well-controlled copolymerization of two asymmetric monomers, carbonyl sulfide and racemic propylene oxide, using (Salen)CrCl in conjunction with bis(triphenylphosphoranylidene)ammonium chloride. The maximum turnover of frequency of this catalyst system was 332 h-1 at 25 C. The contents of monothiocarbonate and tail-to-head linkages of PPMTC were up to 100% (based on 1H NMR spectra) and 99.0% (based on 13C NMR spectra), respectively. PPMTC samples have number-average molecular weight (Mn) up to 25.3 kg/mol with polydispersity index of 1.41. The very low decomposition temperature of 137 C and high refractive index of 1.63 of PPMTC make it a potential scarifying optical adhesive.
Cooperative catalysis with binary Lewis acid-Lewis base system for the coupling of carbon disulfide and epoxides
Wang, Yi-Ming,Li, Bo,Wang, Hui,Zhang, Zhi-Chao,Lu, Xiao-Bing
, p. 614 - 618 (2013/01/15)
The cycloaddition of epoxides with carbon disulfide proceeds effectively by using a binary catalyst system of tetradentate Schiff-base aluminum complexes (designated as salenAlX) as Lewis acid in connection with a nucleophilic co-catalyst, such as quatern
