分子中含有四面体结构的碳原子数为a ,平面为b
CH3CH2CH=CH-C≡CH分子中含有四面体结构的碳原子数为a同一平面上为b,在同一直线上的碳原子数为c,则abc分别为A235B234C464D435请帮我详细说明...
CH3CH2CH=CH-C≡CH 分子中含有四面体结构的碳原子数为a 同一平面上为b,在同一直线上的碳原子数为c,则a b c分别为
A 2 3 5 B 2 3 4
C 4 6 4 D 4 3 5
请帮我详细说明一下。我对这种题一点办法都没有。给我点具体的方法。谢谢
A 答案的b和C应该互换下。 2L的SP啥的我没学过,我学的是人教版的化学必修2.我希望能有简单易懂的方法让我理解。
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A 2 3 5 B 2 3 4
C 4 6 4 D 4 3 5
请帮我详细说明一下。我对这种题一点办法都没有。给我点具体的方法。谢谢
A 答案的b和C应该互换下。 2L的SP啥的我没学过,我学的是人教版的化学必修2.我希望能有简单易懂的方法让我理解。
先对大家的回答表示感谢 展开
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2 5 3
如果把C从左到右编号为1~6,四面体结构的碳原子为:1、2号C原子(没有双键叁键)。同一平面为2、3、4、5、6号碳原子(乙烯结构),同一直线的为4、5、6号碳原子(乙炔结构)。
如果把C从左到右编号为1~6,四面体结构的碳原子为:1、2号C原子(没有双键叁键)。同一平面为2、3、4、5、6号碳原子(乙烯结构),同一直线的为4、5、6号碳原子(乙炔结构)。
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在分子中结合4个原子的碳原子为sp3杂化,形成四面体结构。
在C=C双键两端的碳原子采用sp2杂化,分别结合3个原子。C=C双键两端碳原子所结合的原子必然和这两个碳原子共面。当然由于C-C双键的旋转,也有可能还有更多原子共面。
C≡C三键两端的碳原子采取sp杂化,除彼此结合外,所结合的另外原子和这两个碳原子共线。
本题中从左数第一个和第二个碳原子为sp3杂化的碳原子,也就是含四面体结构的碳原子,所以a为2。
从左数第五和第六个碳原子为sp杂化,所结合的第四个碳原子与这两个碳原子共线。所以c为3。
从左数第三个和第四个碳原子为sp2杂化,所结合的第二个和第五个碳原子与之共面,加上第五和第六个碳原子与第四个碳原子共线,同时也就共面,所以最少有5个碳原子共面。由于第二和第三个碳原子之间的碳碳单键可以旋转,第一个碳原子也可能转到这个面里,所以最多可以6个碳原子共面。b可以为5或者6。
本题提供的选项不符。
在C=C双键两端的碳原子采用sp2杂化,分别结合3个原子。C=C双键两端碳原子所结合的原子必然和这两个碳原子共面。当然由于C-C双键的旋转,也有可能还有更多原子共面。
C≡C三键两端的碳原子采取sp杂化,除彼此结合外,所结合的另外原子和这两个碳原子共线。
本题中从左数第一个和第二个碳原子为sp3杂化的碳原子,也就是含四面体结构的碳原子,所以a为2。
从左数第五和第六个碳原子为sp杂化,所结合的第四个碳原子与这两个碳原子共线。所以c为3。
从左数第三个和第四个碳原子为sp2杂化,所结合的第二个和第五个碳原子与之共面,加上第五和第六个碳原子与第四个碳原子共线,同时也就共面,所以最少有5个碳原子共面。由于第二和第三个碳原子之间的碳碳单键可以旋转,第一个碳原子也可能转到这个面里,所以最多可以6个碳原子共面。b可以为5或者6。
本题提供的选项不符。
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Does fracking pollute groundwater?
Fracking fluids include a lot of compounds, such as sand, ground-up walnut shells,wholesale dropship, salt, citric acid, benzene ?a a recognized carcinogen ?a and lead. Some of these support to maintain the fractures propped open; some decrease water surface tension and maintain particles suspended inside the fluid even at high pressures; and some are biocides that quit bacteria from clogging up the properly.
A US Congressional report released in April showed that the 14 most active hydraulic fracturing companies in the United States together utilized nearly three billion litres of fracking fluid, not including water. The goods contained a minimum of 29 chemicals that are identified or possible human carcinogens2.
The question is what concentrations these chemicals are used in,wholesaler, and whether the substances (or natural hazards including radioactive radium present in the rock) escape the drilling region and contaminate water supplies ?a either by leaking out from the drill website,wholesalers, or by way of improper disposal. An investigation by The New York Times3 revealed worrying levels of radioactivity in fracking wastewater going to rivers in Pennsylvania. The PNAS study, even so, discovered no evidence that fracking fluids had been leaching into wells. The US Environmental Protection Agency launched a study of these questions in March last year ?a but the agency doesn't anticipate results to start coming in until the end of 2012, having a report scheduled for 2014.
Fracking fluids include a lot of compounds, such as sand, ground-up walnut shells,wholesale dropship, salt, citric acid, benzene ?a a recognized carcinogen ?a and lead. Some of these support to maintain the fractures propped open; some decrease water surface tension and maintain particles suspended inside the fluid even at high pressures; and some are biocides that quit bacteria from clogging up the properly.
A US Congressional report released in April showed that the 14 most active hydraulic fracturing companies in the United States together utilized nearly three billion litres of fracking fluid, not including water. The goods contained a minimum of 29 chemicals that are identified or possible human carcinogens2.
The question is what concentrations these chemicals are used in,wholesaler, and whether the substances (or natural hazards including radioactive radium present in the rock) escape the drilling region and contaminate water supplies ?a either by leaking out from the drill website,wholesalers, or by way of improper disposal. An investigation by The New York Times3 revealed worrying levels of radioactivity in fracking wastewater going to rivers in Pennsylvania. The PNAS study, even so, discovered no evidence that fracking fluids had been leaching into wells. The US Environmental Protection Agency launched a study of these questions in March last year ?a but the agency doesn't anticipate results to start coming in until the end of 2012, having a report scheduled for 2014.
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