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MassMS-IW-0010 bis(p-methoxyphenyl)phosphinic acid C14H15O4P (Mass of molecular ion: 278)
Source Temperature: 220 °C Sample Temperature: 180 °C Direct, 75 eV
39.0 1.6 47.0 1.4 50.0 1.2 51.0 1.6 63.0 3.6 64.0 4.2 65.0 3.7 76.0 1.1 77.0 9.6 78.0 3.6 79.0 1.0 92.0 5.5 93.0 1.3 107.0 4.1 108.0 6.0 109.0 2.8 123.0 1.8 124.0 10.4 128.0 1.7 139.0 1.2 155.0 2.7 156.0 1.0 171.0 5.7 199.0 3.9 216.0 2.8 217.0 1.7 229.0 3.3 244.0 2.1 245.0 6.7 246.0 1.5 247.0 2.9 259.0 48.8 260.0 7.9 261.0 2.5 262.0 1.3 263.0 15.7 264.0 2.5 277.0 84.4 278.0 100.0 279.0 17.7 280.0 2.3 367.0 1.1
400 MHz in DMSO-d6
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1H NMR 399.65 MHz C14 H15 O4 P 0.035 g : 0.5 ml DMSO-d6 bis(p-methoxyphenyl)phosphinic acid 
Assign. Shift(ppm)
A 10. B 7.638 C 7.009 D 3.776 J(B,C)=8.8HZ J(B,P-31)=11.5HZ J(C,P-31)=2.4HZ
Hz ppm Int.3062.91 7.664 119 3061.08 7.660 44 3056.13 7.648 48 3054.12 7.642 145 3051.37 7.636 134 3049.54 7.631 48 3044.59 7.619 46 3042.76 7.614 128 3040.20 7.608 20 2806.84 7.024 142 2804.46 7.018 157 2802.45 7.013 52 2800.07 7.007 50 2798.05 7.002 150 2795.67 6.996 135 2793.29 6.990 21 1509.29 3.777 1000
in DMSO-d6
KBr disc
nujol mull
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