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61.
Yohei Ueda Hayato Tsurugi Kazushi Mashima 《Angewandte Chemie (International ed. in English)》2020,59(4):1552-1556
A highly E‐selective cross‐dimerization of terminal alkynes with either terminal silylacetylenes, tert‐butylacetylene, or 1‐trimethylsilyloxy‐1,1‐diphenyl‐2‐propyne in the presence of a dichlorocobalt(II) complex bearing a sterically demanding 2,9‐bis(2,4,6‐triisopropylphenyl)‐1,10‐phenanthroline, activated with two equivalents of EtMgBr, gives a variety of (E)‐1,3‐enynes. A well‐characterized diolefin/cobalt(0) complex, with divinyltetramethyldisiloxane, acted as a catalytically active species without any activation, clearly indicating that a cobalt(0) species is involved in the catalytic cycle. 相似文献
62.
Tsurugi H Yamada K Majumdar M Sugino Y Hayakawa A Mashima K 《Dalton transactions (Cambridge, England : 2003)》2011,40(37):9358-9361
We developed dinuclear molybdenum cluster-catalyzed radical addition and polymerization reactions by tuning the redox potential of the Mo(2) core. A 2,4,6-triisopropylbenzoate-supported Mo(2) complex acts as a catalyst for radical addition reactions of polyhaloalkanes to 1-alkenes and cyclopentene, while amidinate- and guanidinate-supported Mo(2) clusters are effective catalysts for the radical polymerization reaction of methyl methacrylate. 相似文献
63.
Experimental liquid—liquid equilibrium data are reported for the systems acetonitrile—acetone—cyclohexane at 318.15 K and acetonitrile—methyl acetate—cyclohexane at 313.15 K. Two modified forms of the NRTL equation proposed by Renon are presented by substituting local surface fractions for local mole fractions and further by including Guggenheim's combinatorial entropy for athermal mixtures whose molecules differ in size and shape. The resultant equations involve three adjustable parameters and are extended to multicomponent systems without adding ternary (or higher) parameters. Calculated results of vapor—liquid and liquid—liquid equilibria for typical binary and ternary mixtures are presented. 相似文献
64.
Jitsuo Kiji Akio Yamada Fabio Bertini Guido Audisio 《Macromolecular rapid communications》2001,22(8):598-600
Ethene/carbon monoxide copolymers were prepared using the catalyst system Cu(OAc)2/dppp (1,3‐bis(diphenylphosphino)propane)/p‐toluenesulfonic acid (p‐TsOH) or BF3·OEt2/p‐benzoquinone. Pyrolysis‐gas chromatography proves the alternating structure of the copolymers. 相似文献