774-48-1Relevant articles and documents
Pillared cobalt-amino acid framework catalysis for styrene carbonate synthesis from CO2 and epoxide by metal-sulfonate-halide synergism
Kathalikkattil, Amal Cherian,Roshan, Roshith,Tharun, Jose,Soek, Han-Geul,Ryu, Hyeong-Seok,Park, Dae-Won
, p. 284 - 292 (2014)
The sulfonate anion is proposed as a remarkable partaker in catalyzing epoxide-CO2 cycloaddition for cyclic carbonate synthesis. The role is illustrated by the concerted action of a sulfonate-rich cobalt-amino acid framework catalyst [{Co(4,4′-bipy)(L-cys)(H2O)}×H 2O]n (2 D-CCB) and a quaternary ammonium bromide co-catalyst in synthesizing styrene carbonate (SC) at a turnover number of 228. SC yield at atmospheric pressure is presumed to result from the activation of CO2 by the sulfonate group. The involvement of SO3 - anions as basic sites in 2 D-CCB is ascertained from the initial rate (r0) for catalyzing Knoevenagel condensation reactions and by using CO2 temperature programmed desorption. Microwave pulses are used for synthesizing 2 D-CCB at a rate that is 288-fold faster than conventionally employed solvothermal methods. Unambiguous evidence for the pulsating role-play of sulfonate groups in 2 D-CCB is perceived by comparing the activity of an analogous metal organic framework (3 D-CCB) in which the sulfonate oxyanions are jammed by coordination with cobalt. 2 D-CCB is analyzed for heterogeneity, and reused four times. Copyright
Syntheses, characterization and reactivity of dinuclear ruthenium-nickel complexes with hexane-2,5-dione bis(thiosemicarbazonato) ligands
Fang, Duo-Wen,Jia, Ai-Quan,Dong, Xian-Ping,Xin, Zhifeng,Zhang, Qian-Feng
, p. 122 - 129 (2018)
Treatment of hexane-2,5-dione bis(thiosemicarbazones) ([CH3?C{= N?NH?C(=S)?NHR}?CH2]2, R = H, L1H2; CH3, L2H2?Me; CH2CH3, L3H2?Et; C6H5, L4H2?Ph) with nickel(II) acetate hydrate in refluxing ethanol gave a series of NiIIN2S2 metalloligands [Ni(L-R)] for the generation of hetero-bimetallic complexes. The reaction of equal mole each of [Ni(L1)], [Ni(L2?Me)], [Ni(L3?Et)], or [Ni(L4?Ph)] with [RuCl2(dmso)4] (dmso = dimethyl sulfoxide) at reflux resulted in isolation of neutral dinuclear ruthenium-nickel complexes [RuCl2{(Ni(L1)}(dmso)2] (1), [RuCl2{(Ni(L2?Me)}(dmso)2] (2), [RuCl2{(Ni(L3?Et)}(dmso)2] (3), and [RuCl2{(Ni(L4?Ph)}(dmso)2] (4). Interaction of [Ni(L-R)] with [CpRu(PPh3)2Cl] (Cp? = cyclopentadienyl) at room temperature led to formation of cationic dinuclear organoruthenium-nickel complexes [CpRu{(Ni(L1)}(PPh3)]Cl (5), [CpRu{(Ni(L2?Me)}(PPh3)]Cl (6), [CpRu{(Ni(L3?Et}(PPh3)]Cl (7), and [CpRu{(Ni(L4?Ph}(PPh3)]Cl (8). New bimetallic ruthenium-nickel complexes 1–8 have been characterized spectroscopically, of which molecular structures of three complexes [RuCl2{(Ni(L2?Me)}(dmso)2]·CH2Cl2 (2·CH2Cl2), [CpRu{(Ni(L2?Me)}(PPh3)]Cl?EtOH (6?EtOH), and [CpRu{(Ni(L3?Et}(PPh3)]Cl (7?H2O) have been established by single-crystal X-ray crystallography. Their catalytic activities for the acetalation of benzaldehyde in the presence of molecular H2 have been also investigated in this paper.
Thiol-initiated photocatalytic oxidative cleavage of the C=C bond in olefins and its extension to direct production of acetals from olefins
Wang, Xinglin,Li, Yuanyuan,Li, Zhaohui
, p. 1000 - 1006 (2021/02/26)
The oxidative cleavage of olefins to produce aldehydes/ketones is an important reaction in organic syntheses. In this manuscript, a mild and operationally simple protocol for the aerobic oxidation of olefins to produce carbonyl compounds was realized over ZnIn2S4under visible light, using air as the oxidant and a thiol as the initiator. It was proposed that the photogenerated holes over ZnIn2S4attack the thiol to produce thiyl radicals, which initiate the oxidative cleavage of the C=C bond in olefins to produce aldehydes/ketones. By further coupling with the condensation between the as-obtained aldehydes/ketones and alcohols, this strategy can also be applied to the production of different acetals directly from the olefins. This study demonstrates a new pathway to realize the oxidative cleavage of olefins to produce aldehydes/ketones, and also provides a new protocol for the production of acetals directly from the olefins.
Synergistic catalysis of hybrid nano-structure Pd catalyst for highly efficient catalytic selective hydrogenation of benzaldehyde
Zhang, Yanji,Zhou, Jicheng,Li, Kai,Lv, Mengdie
, p. 129 - 137 (2020/01/28)
Selective hydrogenation of benzaldehyde is a green and sustainable technology to produce benzyl alcohol. Herein, we report a hybrid nano-structure catalyst(Pd/@-ZrO2/AC) by photochemical route for selective hydrogenation of benzaldehyde under m
