The microwave-accelerated Claisen rearrangement of allyl aryl ethers was investigated, in order to gain insight into the scope of the catalysts, solvents, temperatures, and substrates. Among the catalysts examined, phosphomolybdic acid (PMA) was found to greatly accelerate the reaction in NMP, at temperatures ranging from 220 to 300 °C. This method was found to be useful for preparing several intermediates
Molybdenum atom ligand substitution reactions of molybdenum-iron-sulfur (MoFe3S4) cubane-type clusters: synthesis and structures of clusters containing molybdenum-bound pseudosubstrates of nitrogenase
作者:R. E. Palermo、R. Singh、J. K. Bashkin、R. H. Holm
DOI:10.1021/ja00321a019
日期:1984.5
Resolution des structures cristallines des trois complexes (Et 4 N) 4 [Mo 2 Fe 6 S 8 (S-p-C 6 H 4 Cl) 6 (cat) 2 ], (Et 4 N) 3 [MoFe 3 S 4 (SEt) 3 (Cl 4 cat)(CN)] et (Et 4 N) 3 [MoFe 3 S 4 (S-p-C 6 H 4 Cl) 3 (Cl 4 cat)N 3 ]•MeCN. Spectres RMN
分辨率 des 结构 cristallines des trois complexes (Et 4 N) 4 [Mo 2 Fe 6 S 8 (SpC 6 H 4 Cl) 6 (cat) 2 ], (Et 4 N) 3 [MoFe 3 S 4 (SEt) 3 ( Cl 4 cat)(CN)] et (Et 4 N) 3 [MoFe 3 S 4 (SpC 6 H 4 Cl) 3 (Cl 4 cat)N 3 ]•MeCN。幽灵RMN
Disclosed are copolymers comprising a backbone with olefinic unsaturation and fluorovinylether functionalized aromatic repeat units, and methods to make the copolymers. The copolymers are useful for imparting improved soil, water, and oil resistance to materials including fibers, fabrics, carpets, films, plaques, and shaped articles. The copolymers can be crosslinked and used to form shaped articles with the improved properties.
ARTICLES MADE FROM CROSSLINKED COPOLYMERS COMPRISING FLUOROVINYLETHER FUNCTIONALIZED AROMATIC MOIETIES
申请人:E I DU PONT DE NEMOURS AND COMPANY
公开号:US20140135456A1
公开(公告)日:2014-05-15
Disclosed are articles made from crosslinked copolymers comprising crosslinks between olefinically unsaturated positions in the backbone of one type of repeat unit and a second repeat unit that is a fluorovinylether functionalized aromatic repeat unit. The articles have enhanced surface fluorine that imparts improved soil, water, and oil resistance to the articles.
Disclosed are crosslinked copolymers comprising a copolymer with crosslinks between olefinically unsaturated positions in the backbone of one type of repeat unit and a second repeat unit that is a fluorovinylether functionalized aromatic repeat unit. The crosslinked copolymers are useful for imparting improved soil, water, and oil resistance to materials including fibers, fabrics, carpets, films, plaques, and shaped articles.