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3-甲基环戊烷-1,2-二酮

产品名称 3-甲基环戊烷-1,2-二酮

CAS号765-70-8

分子式C6H8O2

分子量112.13

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  • Mass

    MS-NW-1239          
    2-hydroxy-3-methyl-2-cyclopenten-1-one
    C6H8O2              (Mass of molecular ion:    112)
    

       Source Temperature: 260 °C
       Sample Temperature: 180 °C
       Reservoir, 75 eV
    

          15.0       2.6
          18.0       1.5
          26.0       4.9
          27.0      21.0
          28.0       6.4
          29.0       8.6
          31.0       1.9
          37.0       1.7
          38.0       3.1
          39.0      18.5
          40.0       5.1
          41.0      41.8
          42.0       8.0
          43.0      28.1
          44.0       4.6
          45.0       1.1
          50.0       3.3
          51.0       3.5
          52.0       1.7
          53.0       5.1
          54.0       3.0
          55.0      27.6
          56.0      18.0
          57.0       4.0
          65.0       3.3
          66.0       6.4
          67.0       1.5
          69.0      43.3
          70.0       5.2
          71.0       2.5
          82.0       1.1
          83.0      22.9
          84.0      21.8
          85.0       1.3
          97.0       6.5
         111.0       4.6
         112.0     100.0
         113.0       7.0
    

90 MHz in CDCl3


  • 1H NMR 89.56 MHz
    C6 H8 O2 0.046 g : 0.5 ml CDCl3
    2-hydroxy-3-methyl-2-cyclopenten-1-one
    ChemicalStructure
        Assign.     Shift(ppm)
    A 6.69 B 2.43 C 2.019

         Hz     ppm     Int.
    

        599.38   6.693     77
        219.88   2.456     28
        218.69   2.442    135
        217.56   2.430   1000
        212.19   2.370     25
        181.44   2.026    370
        180.94   2.021    760
        180.38   2.015    369
    

in CDCl3



CCl4 solution



KBr disc



nujol mull



4880 A,200 M,powder