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458975780

新虫 (小有名气)

[求助] 求翻译一个文献里的 有机的

Carboxylic acids, however, are difficult to hydrogenate in comparison with ketones and esters. Ligand protonation and resultant ligand dissociation, combined
with overcoordination of the generated vacant sites at the metal center by the (bidentate) carboxylate conjugated base, result in detrimental catalyst deactivation. These pathways are especially problematic with first-row transition metals, which typically have weaker metal-ligand bonds than their second- and third-row congeners.

感觉两句话自己都矛盾的。
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458975780

新虫 (小有名气)

送红花一朵
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2楼: Originally posted by hitoli at 2015-11-04 16:00:55
然而,相较于酮和酯,羧酸更难加氢还原。配体质子化和随之发生的配体解离,以及由此产生的中心金属空穴被羧基共轭碱(二齿配体)过配合导致了不利的催化剂钝化。这些过程在第一周期过渡金属中表现出尤为严重的问题, ...

哇,非常感谢!

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3楼2015-11-04 16:04:37
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