Drawing electron group can stabilize carbon anion, and enhance the acid of key C-H.

拉电子基团能使碳负离子稳定，也使C—H键的酸性增强。

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Drawing electron group can stabilize carbon anion, and enhance the acid of key C-H.

拉电子基团能使碳负离子稳定，也使C—H键的酸性增强。

youdao