N
X
C
Hal
O
N
S
P Si
Natural
Products
Solvents
C
C
C
C C
C
367
7.12 Miscellaneous Compounds
367
Typical Ranges (v ~ in cm -1 )
Assignment
Range
Comments
P–H st
2440–2275
Weak to medium, generally one band, in
R 3 PH + very broad. In Raman, weak to
medium
PO–H st
POH comb
2700–2650
2300–2250
Weak, very broad
Weak, very broad
1740–1600
Additional band in O=P–OH (dimer?)
P–O st
1260–855
Subranges:
1050–970,
830–740
P–O–C al st; strong for upper band, often
weak for lower band
1260–1160
P–O–C ar st
995–915
P(V)
875–855
P(III)
1100–940
P–OH st, broad, for P(OH) 2 often two bands
980–900
P–O–P st
P=O st
1300–960
Strong. In Raman, weak to medium
Subranges:
1190–1150
R 3 P=O, also for R: H
1265–1200
R 2 (R'O)P=O, also for R: H
1280–1240
R(R'O) 2 P=O, also for R: H
1300–1260
(RO) 3 P=O
1220–1150
R(HO) 2 P=O
1250–990
R(HO)PO 2
– , more than one band
1125–970,
1000–960
RPO 3
2–
1205–1090
R 2 (HO)P=O
1200–1090,
1090–995
R 2 PO 2
–
≈1250
RO(HO) 2 P=O
1230–1210,
1030–1020
RO(HO)PO 2
–
1140–1050,
1010–970
ROPO 3
2–
1250–1210
(RO) 2 (HO)P=O
1285–1120,
1120–1050
(RO) 2 PO 2
–
1220–1170
R(RO)(HO)P=O
1245–1150,
1110–1050
R(RO)PO 2
–