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1·A new criterion to decide whether the carboxy group coordinating to the metallic ion in mono or bi dentate-fashion in an ambiguous situation, base on coordination bond distances and angles.

通过上述晶体结构中配位键长键角的分析，得到了一个行之有效的标准，判断羧基与中心金属离子是单齿配位还是螯合配位。

2·Moreover, catalytic hydrogenation can be used to the reduction of a variety of organic compounds, such as nitro, carbonyl, amino, aromatic and heteroaromatic compound, hydroxy group and carboxy group.

此外，它除了还原双键以外可以用来还原各种不同的有机化合物，如：硝基、羰基、氨基、芳香族及杂环化合物、羟基、羧基。

3·They contain one or more functional group such as amide, hydroxy, or carboxy.

它们含有一个或多个功能团如：氨基、羟基、羧基。

4·This paper studies water soluble disperse dyes containing carboxy-methyl-sulfonyl group (-SO2CH2COOH).

本文提出一类含有羧甲磺酰基（—SO_2CH_2COOH）的新的水溶性分散染料。