54519-53-8Relevant academic research and scientific papers
Ethylene oxide polymerization catalyzed by aluminum complexes of sulfur-bridged polyphenols
Wasserman, Eric P.,Annis, Ioana,Chopin III, Lamy J.,Price, Philip C.,Petersen, Jeffrey L.,Abboud, Khalil A.
, p. 322 - 333 (2007/10/03)
The products derived from the reaction of sterically hindered sulfur-bridged bisphenols with aluminum trialkyls enable the efficient polymerization of ethylene oxide. The activity of the catalyst is largely determined by the structure of the bisphenol lig
Organoaluminum catalyst
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Page/Page column 8, (2010/02/07)
An organoaluminum reaction product of A.) a ligand of the formula I, wherein R1 represents an alkyl, aryl, arylalkyl, or alkylaryl group, a C3-24 silyl group, or hydrogen, R2, R3, R4, R5, R6, R7, R12, and R13 are the same or different and represent an alkyl, aryl, arylalkyl, or alkylaryl group, a C3-24 silyl group, halide, or hydrogen, with the proviso that at least one of the groups R4 and R13 represents hydrogen, R8 represents an alkoxy, alkyl, aryl, arylalkyl, or alkylaryl group, a C3-24 silyl group, halide, hydroxyl radical, or hydrogen, E represents O, S, Se, or Te, and n is an integer from 1 to 4, and B.) an aluminum compound of formula AlR9R10R11, wherein R9 and R10 are the same or different and represent C1-20 alkyl, aryl, arylalkyl, or alkylaryl group, or hydrogen, and R11 is a C1-20 alkyl, aryl, arylalkyl, alkylaryl or alkoxy group, hydrogen, or halogen is useful as a polymerization catalyst, particularly for the homopolymerization or copolymerization of an alkylene oxide.
Synthesis of mono- and di-potassium salts and methoxy adducts of sulfur-bridged biphenols by selective deprotonation
Arnold, Polly L.,Hall, Jonathan J.,Natrajan, Louise S.,Blake, Alexander J.,Wilson, Claire
, p. 1053 - 1055 (2007/10/03)
Mono- and di-potassium salts and methoxy adducts of sulfur-bridged biphenols by selective deprotonation were synthesized. Flame photometry analysis and a crystal x-ray structural determination were carried out to confirm the composition. Addition of an ethereal solution to a stirred suspension of stoichiometric KH in diethyl ether afforded an analytically pure pale yellow precipitate characterized as the mono-potassium salt. The non-macrocyclic ligands described show selective deprotonation chemistry, creating simple routes to tuneable, mono- or di-anionic acryloxide-based ligands.
