N-Boc-L-valine

Mass

MS-NW-6314          
N(alpha)-tert-butoxycarbonyl-L-valine
C10H19NO4           (Mass of molecular ion:    217)

   Source Temperature: 150 °C
   Sample Temperature: 120 °C
   Direct, 75 eV

      15.0       1.5
      27.0       7.1
      28.0       8.8
      29.0      14.8
      30.0       1.5
      31.0       4.1
      39.0       6.2
      40.0       1.0
      41.0      24.0
      42.0       2.1
      43.0       5.6
      44.0       1.2
      45.0       1.3
      55.0       7.1
      56.0       6.9
      57.0     100.0
      58.0       4.9
      59.0      32.3
      60.0       1.0
      72.0      36.5
      73.0       2.3
      74.0       4.8
      75.0       1.9
      98.0       3.1
     100.0       1.0
     101.0       6.9
     102.0       1.2
     116.0      26.0
     117.0       2.8
     118.0       1.1
     119.0       3.3
     144.0       2.0
     172.0       9.8
     173.0       1.0

Assign. Shift(ppm) A 10.9 B 6.33 B 5.09 C 4.27 C 4.03 D 2.20 E 1.450 F *1 1.00 G *1 0.94 MIXTURE OF ISOMERS DUE TO HINDERED C-N ROTATION.

     Hz     ppm     Int.

    579.83   1.451   1000
    404.05   1.012     68
    397.34   0.995     66
    377.04   0.944     49
    370.33   0.927     43