... 邻对位向 ortho-para orientation 邻对位比 ortho-para-ratio 火成岩 ortho-rock ...
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ortho-para ratio 邻位
Catalytic nitration of toluene occurs by use of nitric acid in the presence of bentonite metal nitrates with useful para selectivities, up to a para to ortho ratio 1.0.
在皂土硝酸盐催化下， 甲苯能被浓硝酸对位选择性硝化，对邻硝化产物比率达1．0以上。
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