The hope of doing each other some good prompts these advertisements An alignment jig for NMR Over about a 45° temperature range 4,4'B is (hexyloxy) azoxybenzene ( EASTMAN 10120) is aligned in one dimension and randomly arranged in the other two dimensions, a state termed nematic and recognized long ago as fraught with possibilities. One such now flickering into prominence is use of EASTMAN 10120 for
aligning other molecules with the magnetic field of a nuclear magnetic resonance machine. Let's say your solute is benzene. No longer (it is reported in Journal of the American Chemical Society 86:5023) is one hydrogen nucleus indistinguishable from another on the benzene ring. No
longer, therefore, does the N M R spectrum of benzene consist of a single narrow line. Now our nematic product seizes upon the flatness of the benzene molecule, while the magnetic field seizes upon its 7r-clouds. Each of the hitherto indistinguishable protons now "sees" a "para," two "ortho," and two "meta" neighbors. Each affects the other's magnetic environment, both directly and through electrons. The interactions transform the one-line N M R spectrum into about 50 lines, all predictable on the assumption that benzene is a regular hexagon. Very neat. Lends further, if no longer necessary, confirmation to the
picture of the benzene molecule that awoke Herr Kekule from his legendary, troubled, and prescient snooze by the fireplace in 1865. For the convenience of those concerned with molecules where confirmation of postulated shape is still necessary, Distillation Products Industries, Rochester, N. Y. 14603 {Division of Eastman Kodak Company) offers 4,4' -Bis{hexyloxy)azoxybenzene at $9.10 for 5 grams; $17.05 for 10 grams. It is, indeed, convenient to introduce some orientation without freezing the magnetic nuclei into a full-fledged three-dimensional crystal, where a virtual infinity of couplings smears the spectrum into a continuum. The EASTMAN Organic Chemicals catalog is full of many other conveniences.
boxes has been loaded with about the number of parts per million of various olefins and aldehydes that might be encountered in a vicinity where people are earning a livelihood, maintaining their possessions, or just strolling in the park. The solar radiation below 340m [K turns out to be quite capable of oxidizing aliphatic aldehydes to intermediates that react with olefinic and aromatic hydrocarbons at these dilutions to produce significant levels of mucosal irritants and phytotoxicants. This process, some fear, could thwart efforts to sweeten the air by regulating nitrogen oxide effluvia. Slightly ahead of regulatory action in less populous areas, Los Angeles County meanwhile has put into effect quantitative restrictions on the sale and use of
photochemically reactive solvents. These are spelled out: 1) any hydrocarbons, alcohols, aldehydes, esters, ethers, or ketones with olefinic or cycloolefinic unsaturation; 2) aromatics of 8 or more carbons; 3) toluene; 4) trichloroethylene; 5) branched-chain ketones. We are big both in branched-chain ketones and in competitive instinct. The latter has forced us to outperform competitors in helping solvent customers work out effective replacement formulas with the least rise in cost—even when necessary to include competitors' solvents in our suggestions. Companies that wish to keep in touch with those suggestions should register their interest with Eastman Chemical Products, Inc., Kingsport, Tenn. 37662 {Subsidiary of Eastman Kodak Company).
Prices subject to change without notice.
In the interests of solvent customers and mild air Defenders of air pollution are now scarcer than foes of motherhood or friends of sin. Something will doubtless be done about automotive fumes. Furthermore, attention is turned to how you pollute the air when you paint your dwelling and all that solvent evaporates. As a maker of solvents we feel involved. We sympathize with our paint-and-lacquer-manufacturing customers, with the regulatory authorities, and with the innocent public, which includes us too. The issues are not only ethically and economically complex but also chemically so. On the roof of the laboratory of the National Center for Air Pollution Control in Cincinnati, plastic containers of air are exposed to the sun. The air in the
Information. May we help you? Information can be stored in very compact form in the human head, but capacity and reliability problems arise. Equally basic problems often affect magnetic storage. Visible storage on paper has its merits, but with volume the physical dimensions grow disproportionate to human arms and torsos. So we go to microfilm systems for telephone company lookup operations, other public utilities, and other businesses that stand or fall in public esteem by ability to come up pleasantly and exceedingly swiftly with all the details of an individual case. Here, for example, is what a lookup station of a telephone company looks like when it uses the RECORDAK MICROSTRIP® System. Right now we are making rapid progress in equipment for maximizing the efficiency of updating information files like this. With such a solid commercial base already extant for developing such fingertip information systems, we thought we'd mention the subject here for possible interest to readers confronted with swiftly spooning information out of large pools for publics of their own. /~
Discussion is welcomed by Eastman Kodak Company, Business Systems Markets Division, Rochester, N. Y. 14650.
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