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preface to fifteenth edition

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SPECTROSCOPY 7.121<br />

TABLE 7.73<br />

Phosphorus-31 Chemical Shifts (Continued)<br />

Structure<br />

Identical a<strong>to</strong>ms<br />

attached directly<br />

<strong>to</strong> phosphorus<br />

Structure<br />

Identical a<strong>to</strong>ms<br />

attached directly<br />

<strong>to</strong> phosphorus<br />

PF 5 35<br />

PF 6 H 144<br />

PBr 5 101<br />

P(OC 2 H 5 ) 5 71<br />

3<br />

PO 4 6<br />

O"P[OSi(CH 3 ) 3 ] 3 33<br />

H 4 P 2 O 7 11<br />

Phosphonates<br />

24<strong>to</strong> 2<br />

Phosphonium cations<br />

Alkyl<br />

4 3<strong>to</strong>32<br />

Aryl<br />

35 <strong>to</strong> 18<br />

(O 3 P9PO 3 ) 4 9<br />

Polyphosphates<br />

O"P9O9<br />

O<br />

9O9P9O9<br />

OR<br />

(middle group) ca 18<br />

O<br />

9O9P9O9<br />

O<br />

P (etc.)<br />

(branch group) ca 30<br />

(OR) 2(end<br />

group) ca 6<br />

Structure<br />

Identical a<strong>to</strong>ms<br />

attached directly<br />

<strong>to</strong> phosphorus<br />

Non-identically substituted phosphorus<br />

R CH 3 R C 2 H 5 R C 6 H 5<br />

S"PR 3 59 55 43<br />

S"PCl 3<br />

29<br />

S"PRCl 2 80 94 75<br />

S"PR 2 Cl 87 109 80<br />

S"PBr 3 112<br />

S"PRBr 2 21 42 20<br />

S"PR 2 Br 64 98<br />

S"P(OR) 3 73 68 53<br />

S"P(OR)Cl 2 59 56 54<br />

S"P(OR) 2 Cl 73 68 59<br />

S"PH(OR) 2 74 69 59<br />

S"P(SR) 3 98 92 92<br />

S"P(NH 2 ) 3<br />

60<br />

S"P(NR 2 ) 3 82 78<br />

Se"P(OR) 3 78 71 58<br />

Se"P(SR) 3 82 76<br />

P(OR) 5 71 86<br />

PRF 4 30 30 42<br />

PR 2 F 3 9 6

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