新hexaalkylborazine铬三羰(Ñ -Pr)3乙3 Ñ 3我3的Cr(CO)3(V)中,Me 3乙3 Ñ 3(Ñ -Pr)3的Cr(CO)3(VI),(我- (Pr)3 B 3 N 3 Me 3 Cr(CO)3(VII)和Me 3 B 3 N 3(i- Pr)3 Cr(CO)3(VIII)已由fac制备-Cr(CO)3(MeCN)3和相应的硼嗪在二恶烷中或不使用溶剂的情况下。它们比可容易地从Et 3 B 3 N 3 Me 3 Cr(CO)3和Et 3 B 3 N获得的异构体配合物Et 3 B 3 N 3 Et 3 Cr(CO)3(IV)不稳定。3 Et 3通过环配体交换。NMR,IR,UV。化合物IV–VIII的质谱数据和质谱数据将简要讨论。硼嗪衍生物(n -Pr)的制备还报道了3 B 3 N 3 Me 3(IX)和Me 3 B 3 N 3(n -Pr)3(X)。
Hydrodechlorination of Et
<sub>3</sub>
NBCl
<sub>3</sub>
Catalyzed by Amorphous Nickel Boride – A Mechanistic Approach
作者:Christian Reller、Florian O. R. L. Mertens
DOI:10.1002/ejic.201301253
日期:2014.1
catalytic hydrodechlorination of BCl3 with molecular hydrogen in the presence of tertiaryamines is a viable strategy for the energy-efficient generation of valuable B–H bonds. A mechanistic study based on experiments with isolated intermediates and deuterium labeling experiments is presented. The occurrence of the rate-limiting reverse reaction from the insoluble Et3NHCl adduct was identified as a
N″-triethylborazine was carried out at 50 °C in the presence of a rhodium(I) catalyst. Addition of dppb or DPEphos (1 equiv.) to RhH(CO)(PPh3)3 gave the best catalyst for hydroboration of ethylene at 50 °C, resulting in a quantitative yield of B,B′,B″-triethyl-N,N′,N″-trimethylborazine. On the other hand, a complex prepared from (t-Bu)3P (4 equiv.) and [Rh(coe)2Cl]2 gave the best yield for hydroboration of terminal