环保且廉价的有机铝化合物二异丁基氢化铝 (HAl i Bu 2 ) 通过将末端炔烃加成到碳二亚胺中,作为 CC 键形成的有效预催化剂,这是第 13 族络合物使用的罕见样品用于催化此类反应。初步的机理研究表明,该反应主要是通过首先对碳二亚胺进行加氢铝化,然后再用乙炔进行质子分解来进行的。碳化二亚胺分子被插入到生成的炔基铝化合物的 Al-C 键中。通过与乙炔的第二次质子分解获得最终产物。
Highly Active Dinuclear Titanium(IV) Complexes for the Catalytic Formation of a Carbon–Heteroatom Bond
作者:Jayeeta Bhattacharjee、Adimulam Harinath、Indrani Banerjee、Hari Pada Nayek、Tarun K. Panda
DOI:10.1021/acs.inorgchem.8b01766
日期:2018.10.15
The catalytic efficiency of the dinuclear complex depends on the cooperative effect of the TiIV ions, the systematic variation of the intermetallic distance, and the ligand’s steric properties of the complex, which enhances the reaction rate. Most interestingly, this is the first example of catalytic insertion of various E–H bonds into the carbodiimides using a single-site catalyst because only the titanium-mediated
Highly effective capture and subsequent catalytic transformation of low-concentration CO<sub>2</sub> by superbasic guanidines
作者:Hui Zhou、Wei Chen、Ji-Hong Liu、Wen-Zhen Zhang、Xiao-Bing Lu
DOI:10.1039/d0gc03009k
日期:——
(10% CO2/90% N2, v/v) or directly from dry air (∼400 ppm CO2). The zwitterionic BIG–CO2 adducts were successfully isolated and characterized. X-ray single crystal analysis revealed the bent geometry of the binding CO2 in the BIG–CO2 adduct with an O–C–O angle of 129.7° and increased C–O bond distances (1.253 and 1.237 Å) in comparison with free CO2. Notably, the resulting BIG–CO2 adducts were found to
Catalytic insertion of E–H bonds (E = C, N, P, S) into heterocumulenes by amido–actinide complexes
作者:Rami J. Batrice、Moris S. Eisen
DOI:10.1039/c5sc02746b
日期:——
We report herein the actinide-mediated insertion of E–H bonds (E = C, N, P, S) into various heterocumulenes including carbodiimides, isocyanates, and isothiocyanates.
Divalent Lanthanide Complexes: Highly Active Precatalysts for the Addition of N−H and C−H Bonds to Carbodiimides
作者:Zhu Du、Wenbo Li、Xuehua Zhu、Fan Xu、Qi Shen
DOI:10.1021/jo801693z
日期:2008.11.21
lanthanide complexes with the formula LnL2(sol)x (L = N(TMS)2, sol = THF, x = 3, Ln = Sm (I), Eu (II), Yb (III); L = MeC5H4, sol = THF, x = 2, Ln = Sm (IV); L = ArO(Ar = [2,6-((t)Bu)2-4-MeC6H2]), sol = THF, x = 2, Ln = Sm (V)), especially complexes I- III, serve as excellent catalyst precursors for catalytic addition of various primary and secondary amines to carbodiimides, efficiently providing the