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CHEMISTRY AND CHEMICAL ENGINEERING 177
Ch. 156 a, b. INTRODUCTION TO WAVE MECHANICS, wrrH CHEMICAL
ApPLICATIONS. 6 units; first and second terms.
After a discussion of the development and significance of the new
quantum mechanics, the wave equation of Schrodinger is used in the
treatment of the oscillator, rotator, and hydrogen atom. The perturbation
theory and the theory of the Heisenberg-Dirac resonance phenomenon
are then developed and applied to various problems, including the
Stark effect, helium atom, hydrogen molecule ion, hydrogen molecule,
forces in the hydrogen halides, Van del' 'Wanls' forces in helium, the
scattering of X-rays by bound electrons, and the sharpd electron pair
bond.
(Not given in 1929-1930.)
Instructor: Pauling.
Ch. 157. THE STRUCTURE OF CRYSTALS. 6 units; third term.
The' subject treats the methods of determining the structures of
crystals with X-rays; the various structures occurring in nature, and
their relation to the phenomena of isomorphism, solid solution formation,
cleavage, etc.; ionic and atomic sizes and their bearing on the chemical
properties of substances; interatomic forces in crystals; the crystal
energy and its use in chemical thermodynamics, and related topics.
(Not given in ] 9529-1930.)
Instrudor: Pauling.
Ch. 158. PHOTOCHEMISTRY. 6 units; first term.
Lectures and discussions on photochemical processes, especially in
their relations to quantum phenomena. The following topics will bc
included: the photochemical absorption law; the processes-excitation,
dissociation, ionization-accompanying the absorption of radiation; subsequent
processes including fluorescence and collisions of the second
kind; photosensitization; quantum yield and its relation to photochemical
mechanism; catalysis and inhibition; temperature coefficients of photochemical
reactions.
(Not given in 1929-1930.)
Instructor: Dickinson.
I
Ch. 160. INORGANIC CHEMISTRY (Seminar). .6 anita! seeond tanH. '! '
Selected groups of inorganic compounds (e.g., the various compounds
of nitrogen with hydrogen and with oxygen) will be considered from
modern physico-chemical view-points; thus with reference to their physical
properties, their thermodynamic constants (their heat-contents, freeenergies,
and entropies); their rates of conversion into one another
(including effects of catalysis and energy radiations), the ionization of