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1,2-Dibromobenzene

Product Name 1,2-Dibromobenzene

CAS583-53-9

MFC6H4Br2

MW235.9

¹³CNMR

Mass

MS-NW-0824          
o-dibromobenzene
C6H4Br2             (Mass of molecular ion:    234)

   Source Temperature: 220 °C
   Sample Temperature: 150 °C
   Reservoir, 75 eV

      37.0       3.7
      38.0       6.2
      49.0       4.0
      50.0      25.5
      51.0       3.5
      73.0       3.2
      74.0      14.9
      75.0      33.9
      76.0      23.4
      77.0       3.6
      79.0       1.8
      81.0       2.1
     117.0       3.8
     118.0       7.1
     119.0       3.4
     128.0       1.3
     129.0       1.4
     130.0       1.3
     131.0       1.3
     155.0      39.0
     156.0       3.3
     157.0      38.5
     158.0       2.5
     190.0       1.0
     192.0       1.3
     234.0      50.9
     235.0       3.7
     236.0     100.0
     237.0       6.7
     238.0      49.0
     239.0       3.3

90 MHz in CDCl3

parameter in CDCl3

¹H NMR	89.56 MHz
C₆ H₄ Br₂	0.04 ml : 0.5 ml CDCl₃
o-dibromobenzene

    Assign.     Shift(ppm)

      A             7.60
      B             7.16

     Hz     ppm     Int.

    690.50   7.710     64
    689.75   7.702     66
    686.25   7.663    681
    682.75   7.624    932
    680.63   7.600    547
    680.13   7.595    710
    678.63   7.578     46
    678.19   7.573     45
    676.88   7.558   1000
    673.00   7.515    223
    648.38   7.240    231
    644.56   7.197    991
    642.88   7.179     54
    641.25   7.161    602
    640.81   7.156    541
    638.63   7.131    902
    635.13   7.092    660
    631.69   7.054     65
    630.94   7.045     59

¹H NMR	300 MHz
C₆ H₄ Br₂	10 wt% in CCl₄
o-dibromobenzene

    Parameter     ppm  Hz

      D(A)         7.544
      D(B)         7.079
       J(A,A')         0.30
       J(A,B)          7.97
       J(A,B')         1.50
       J(A',B)         1.50
       J(A',B')        7.97
       J(B,B')         7.46
     
     CASTELLANO,S. & KOSTELNIK,R. TETRAHEDRON LETT. 1967, 5211

     Hz     ppm     Int.

   2272.21   7.574     74
   2271.72   7.572     81
   2268.05   7.560    873
   2264.53   7.548    836
   2262.12   7.540    826
   2258.59   7.529    998
   2254.77   7.516    112
   2132.13   7.107    111
   2128.32   7.094   1000
   2124.79   7.083    826
   2122.38   7.075    836
   2118.85   7.063    875
   2115.18   7.051     81
   2114.70   7.049     75

in CDCl3

liquid film

4880 A,200 M,liquid

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