In order to probe the differences in structure and reactivity between complexes of Zr and Hf, the preparation of (VII), its reactions and its X-ray structure (data not given) are reported.doi:10.1002/chin.199035232BUCHWALD, S. L.KREUTZER, K. A....
In the case of HF and TFSA catalysts, solvent CO 2 increased the octane number of the alkylate product (RON 95.6 for HF‐ and 88.0 for TFSA‐catalyzed alkylation with CO 2 solvent). 展开 关键词: alkylation isobutane isobutylene HF PPHF H2SO4 trifluoromethanesulfonic acid liquid CO2 ...
19F NMR: δ −9.1 d (CF3). MS (m/z, species, intensity %): 172 [M−F]+ (30); 122 [M−CF3]+ (100); 102 [M−CF3−HF]+ (50); 77 [F2C═CH—CH2]+ (50) 69 [CF3]+ (90).Example 24Polymerization of CH2═C(CF3)CF2OCH(CF3)2 with CF2═CH2 ...
Liang YR, Wang YQ, Wu YP, Lu YL, Zhang HF, Zhang LQ (2005) Preparationand properties of isobutylene –isoprene (IIR)/clay nanocomposites. Polym Test 24:12–17 Article Google Scholar Yurong L, Weiliang C, Zhao L, Yiqing W, Youping W, Liqun Z (2008) A new strategy to improve the...
Hydrophobic thermoplastic elastomers, e.g., poly(styrene-b-isobutylene-b-styrene) (SIBS), have found various in vivo biomedical applications. It has long been recognized that biomaterials can be adversely affected by bacterial contamination and clinical infection. However, inhibiting bacterial colonization...
Initiator is compound of general formula Cp*MMe3, where Cp* is η5-pentamethylcyclopentadienyl, M is Ti, Hf, or Zr, Me is methyl, and activator is prepared by reaction of B(C6F5)3 with co-initiator, which is selected from group composed of alcohol, thiol, carboxylic acid, and ...
A process for producing an alkylation reaction product from an isoparaffin and an olefinic reactant containing 1-butene, 2-butene and isobutylene by fractionating the olefinic reactant into a 2-butene fraction and a separate 1-butene and isobutylene fraction. The 2-butene is charged to an HF ...
Suitable solid acid catalysts include zeolite Beta, hydrogen-fluoride-treated 尾-zeolites, and HF-treated montmorillonite clays. Quantitative tert-butanol conversions have been realized.doi:10.1023/A:1009026303356John F. KniftonJohn R. SandersonMelvin E. Stockton...
and R1 to R3 is a C1 to C12 alkyl group, with a compound R' of the formula M'R4R5R6, in which M' is Si, Ge, Sn or Pb and R4 to R6 is a C1 to C12 alkyl group as well as a non-coordinating anion of the general structure [M2X9]- in which M is Zr or Hf and X is ...
其中,R为通式为SiR1R2R3的基团,R″为氢、C1-C12烷基、C6-C14芳基或C7-C20烷芳基,M为Zr或Hf,X为卤素原子,和R1-R3为C1-C12烷基,所述稳定是采用通式为M′R4R5R6的化合物R′进行的,其中,M′为Si、Ge、Sn或Pb,R4-R6为C1-C12烷基,以及具有通式[M2X9]-的非配位阴离子,其中,M为Zr或Hf,X为卤素原子。