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preface to fifteenth edition

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4.8 SECTION 4<br />

TABLE 4.2<br />

Ionization Energy of the Elements (Continued)<br />

At.<br />

no.<br />

Element<br />

Spectrum (in MJ · mol 1 )<br />

I II III IV V VI<br />

92 U 0.598<br />

93 Np 0.605<br />

94 Pu 0.585<br />

95 Am 0.578<br />

96 Cm 0.581<br />

97 Bk 0.601<br />

98 Cf 0.608<br />

99 Es 0.619<br />

100 Fm 0.627<br />

101 Md 0.635<br />

102 No 0.642<br />

Source: C. E. Moore, National Standard Reference Data Series 34,U.S. Government Printing Office,Washing<strong>to</strong>n,D.C.,<br />

1970; W. C. Martin,Zalubas,R.,and Hagan,L.,J. Phys. Chem. Reference Data, 3:771 (1974) and National Standard Reference<br />

Data Series,National Bureau of Standards (U.S.),No. 60 (1978) for the Rare Earth Elements; and Cohen,E. R. and Taylor,B.<br />

N., J. Phys. Chem. Reference Data, 17:1795 (1988).<br />

TABLE 4.3<br />

Ionization Energy of Molecular and Radical Species<br />

This table gives the first ionization potential in MJ · mol 1 and in electron volts. Also listed is the enthalpy of<br />

formation of the ion at 25C (298 K).<br />

Compounds containing carbon<br />

Species<br />

In MJ · mol 1<br />

Ionization energy<br />

In electron volts<br />

f H (ion)<br />

in kJ · mol 1<br />

Acenaphthene 0.741 7.68 896<br />

Acenaphthylene 0.793 8.22(4) 1053<br />

Acetaldehyde 0.98696(7) 10.2290(7) 821<br />

Acetamide 0.931(3) 9.65(3) 693<br />

Acetic acid 1.029(2) 10.66(2) 596<br />

Acetic anhydride 0.965 10.0 398<br />

Ace<strong>to</strong>ne 0.9364 9.705 719<br />

Ace<strong>to</strong>nitrile 1.1766(5) 12.194(5) 1252<br />

Ace<strong>to</strong>phenone 0.896(3) 9.29(3) 810<br />

Acetyl chloride 1.047(5) 10.85(5) 804<br />

Acetyl fluoride 1.111(2) 11.51(2) 667<br />

Acetylene 1.1000(2) 11.400(2) 1328<br />

Allene 0.935(1) 9.69(1) 1126<br />

Allyl alcohol 0.933(5) 9.67(5) 808<br />

Allylamine 0.845 8.76 891<br />

3-Amino-1-propanol 0.87 9.0 651<br />

Aniline 0.7449(2) 7.720(2) 832<br />

Anthracene 0.719(3) 7.45(3) 949<br />

Azoxybenzene 0.78 8.1 1123<br />

Azulene 0.715(2) 7.41(2) 1004<br />

Benzaldehyde 0.916(2) 9.49(2) 878<br />

Benzamide 0.912 9.45 811

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