Transfer hydrogenation of nitroarenes with hydrazine at near-room temperature catalysed by a MoO2 catalyst

Transfer hydrogenation of nitroarenes with hydrazine at near-room temperature catalysed by a MoO2 catalyst
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MoO2催化剂催化近室温硝基芳烃与肼的转移加氢

DOI:
10.1039/c5gc02460a
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发表时间:
2016-04
期刊:
影响因子:
9.8
通讯作者:
Wang Feng
Wang Feng
中科院分区:
化学1区
文献类型:
--
作者:
Wang Yehong;Zhang Zhe;Chen Haijun;Wang Feng

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我们对结晶 MoO2 上肼氢转移的基本步骤进行了实验和计算研究,并证明了其在催化氢化反应中独特的双功能金属基本性质。密度泛函理论(DFT)计算表明,通过预先裂解N-H键而不是N-N键进行逐步氢转移,是在Mo和O双位点上产生离解的氢化物和质子物种的关键步骤,这标志着其与普通氧化物的不同。在室温及更低温度(低至 0 °C)下,结晶 MoO2 对 CC、CC 和 CN 基团的硝基还原表现出极高的化学选择性,使其成为一种有前景的加氢反应催化材料。
We present an experimental and computational study of the elementary steps of hydrazine hydrogen transfer on crystalline MoO2, and demonstrate its unique bifunctional metallic-basic properties in a catalytic hydrogenation reaction. Density functional theory (DFT) calculations suggest that the stepwise hydrogen transfer via the prior cleavage of the N–H bond rather than the N–N bond, is the key step to create the dissociated hydride and proton species on the dual Mo and O sites, marking its difference with common oxides. Crystalline MoO2 shows exceptionally high chemoselectivity toward the nitro reduction over CC, CC, and CN groups at room temperature and lower, down to 0 °C, rendering it as a promising catalytic material for hydrogenation reactions.
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