solvent

in steemstem •  7 years ago  (edited)

solvent

steemstem
7 years ago by

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    • [-]
      ·  7 years ago 

    那些1ml 5ml的有机配体。是不是更贵哈哈

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    [-]
      ·  7 years ago 

    哈哈，有手性的那些500毫克已經好貴了
    好像有很多化學人呢 XDD

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    [-]
      ·  7 years ago 

    本科学的那些，到了phd毕业早忘光了。

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    [-]
      ·  7 years ago 

    😂

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      [-]
        ·  7 years ago (edited)

      头一次听说这种试剂，学习了，感谢分享！

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      [-]
        ·  7 years ago 

      :DDDD 這麽貴的東西能省下就好了 XDD

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        [-]
          ·  7 years ago 

        那个科学摄影比赛食物结束了吗？我终于想到拍什么了

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        [-]
          ·  7 years ago 

        還有21.5 小時才結束啊！！香港時間 23/1/18 2359 結束
        加油加油 ;)

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          [-]
            ·  7 years ago 

          好的好的，你怎么还不睡，我这是睡醒了呢，早点休息吧。

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          [-]
            ·  7 years ago 

          要喝了這個比茅台還貴的液體！！！（說笑）😂😂😂😂

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          [-]
            ·  7 years ago 

          怎麽 @aaronli 上身了 😂😂

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            [-]
              ·  7 years ago 

            自從做錯事後，我從此都沒有再喝茅台了...

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            [-]
              ·  7 years ago 

            所以最錯的事是沒喝茅台！！

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              [-]
                ·  7 years ago 

              飲！🍻🍻🍻

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                [-]
                  ·  7 years ago 

                Prices of deuterated solvents are just crazy!
                http://www.deutero.de/en/nmr-solvents.html
                I miss the lab

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                [-]
                  ·  7 years ago 

                Yes, I was really suprized the price difference between deuterated chloroform and deuterated DCM, which is unbelieveable

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                  1 vote
                  [-]
                    ·  7 years ago 

                  our professor always was mad when we had to use deuterated DCM or toluene-D8. But sometimes theres no other way. nmr spectra of badly solved molecules are useless

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                    [-]
                      ·  7 years ago 

                    Definitely! Usually the problem is solubility so I have to use alternatives.
                    d6-benzene was slightly cheaper than I expected ~ but to do benzylic proton exchange to deuterium should be much more challenging so the price is higher (?)
                    (I expect d6-benzene was made by hydrogenation and dehydrogenation with D2 gas on some catalyst)

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                      1 vote
                      [-]
                        ·  7 years ago 

                      When I remember correcly for benzene it is possible to just stir or boil(?) it with D2SO4 for proton exchange. A colleague tried this way for xylene but just ended with a messy black slime...

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                        [-]
                          ·  7 years ago 

                        oh I didnt expect D2SO4 is strong enough!!!
                        Haha black slime, so sad ~

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                          [-]
                            ·  7 years ago 

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                            [-]
                              ·  7 years ago 

                            23：00我终于写完我的冻豆腐。。。我是最后一个交作业的吧哈哈

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