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preface to fifteenth edition

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GENERAL INFORMATION, CONVERSION TABLES, AND MATHEMATICS 2.19<br />

TABLE 2.2<br />

Physical and Chemical Symbols and Definitions (Continued)<br />

L. Spectroscopy (continued)<br />

Name Symbol SI unit Definition<br />

Transition frequency Hz (E E)/h<br />

Transition wavenumber ˜, () m 1 ˜<br />

T T<br />

Transverse relaxation time T 2 s<br />

Vibrational anharmonicity e e ; rs ; m 1<br />

constant<br />

g tt<br />

Vibrational coordinates:<br />

Internal coordinates R i , r i , j ,<br />

etc.<br />

Normal coordinates, dimensionless<br />

q r<br />

Mass adjusted<br />

Q r<br />

Vibrational force constants:<br />

Dia<strong>to</strong>mic f, (k) J · m 2 f 2 V/r 2<br />

Polya<strong>to</strong>mic<br />

Dimensionless normal<br />

coordinates<br />

rst...,<br />

k rst . . .<br />

Internal coordinates f ij (varies) f ij 2 V/r i r j<br />

Symmetry coordinates F ij (varies) F ij 2 V/S i S j<br />

Vibrational quantum numbers<br />

v r ; l t<br />

Vibrational term G m 1 G E vib /hc<br />

m 1<br />

Angular momentum types<br />

Opera<strong>to</strong>r<br />

symbol<br />

Quantum number symbol<br />

Total Z axis z axis<br />

Electron orbital ˆL L M L <br />

One electron only ˆl l m l <br />

Electron orbital spin Lˆ Sˆ<br />

<br />

Electron spin Ŝ S M S <br />

One electron only ŝ s m s <br />

Internal vibrational:<br />

Spherical <strong>to</strong>p ˆl l(l) K l<br />

Other ĵ, ˆ l(l)<br />

Nuclear orbital (rotational) ˆR R K R , k R<br />

Nuclear spin Î I M I<br />

Sum of J I ˆF F M F<br />

Sum of N S Ĵ J M J K, k<br />

Sum of R L(j) ˆN N K, k<br />

M. Thermodynamics<br />

Name Symbol SI unit Definition<br />

Absolute activity B exp( B /RT)<br />

Activity (referenced <strong>to</strong><br />

Henry’s law):<br />

B<br />

* B<br />

Concentration basis a c ac,B exp RT

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