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Nomenclature of Amines At the meeting of the Committee o n

Nomenclature of t he ACS Division of Organic Chemistry in Cincinnati H. J . Harwood, chairman of the stibcoimmit-tee on amines, stated tha t a revised re ­port is being prepared. T h e dra.it of July 1954 has not met wrtli serious criticism. In general the system, em­ployed by Chemical Abstracts i s re­tained. Since "tridecylamine;" properly designates 0 1 3 Η 2 7ΝΗ 2 , " t r is(decyl)-amine" is recommended for (C10-H 2 i ) 3N. T h e use of laxiryl for docdecyl, stearyl for octadecyl, etc., i s discour­aged. As in other fields, th*5 question as to what trivial names are t o b e pre­ferred to t h e systematic ones is difficult to decide.

Another question concerns the n a m e s of amines of ring systems. CA uses such index entries as l-Flu_orenQ.rnine and 2-Fluorenemethylamirie for- the purpose of getting the entry -under the name of the ring system iixid a.t the same time expressing the amine func­tion as a suffix. Still another question deals with names of poryamin.es. in te r ­national Union rule 33 [J. ALTTI. Chen. Soc, 55, 3918 ( 1 9 3 3 ) ] says tha t the name of t h e hydrocarbon wnLll b ^ fol­lowed by t h e suffixes diamine^ tria_mirie, etc. : as, 1,2-ethanediamine. An alter­native would b e to use a hydrocarbon radical name: as , ethylertediajnine. Linear polyamines, amines containing at the same t ime other functional groups, and salts of amines pirovide other problems. Ajnyone halving opin­ions on these matters should write t o H. J. Harwood, Armour k Co.-, Re­search Division, Union Stock Yards , Chicago 9, 111.

Try, Try. Try A g o in At the Cincinnati meeting, in repor t ­

ing on a rule about t h e di—, tri— and bis-, tris- series of prefixes, Johtn r l . Fletcher brought u p this c=ase: Tri-triacontane is the approved nacne of normal C3 3HG 8 ; its radical is tritrxacon.-tyl. Would the n a m e of £ts tert iary amine be tritritriacontylaminie? As a t present drawn the rule would prevent this by substituting tris- for t h e first tri-, which we admit sounds "better,

W h a t Metals A r e "Heairy"? Karl F . Heumann wonders w^Xiat i s

meant by "heavy meta l . " One author­ity says it is any meta l having a . spe­cific gravity greater than 4.0- Another says it is sometimes appl ied to those of sp. gr. 5.0 or over. He also finds

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that t i tanium is the only true metal with sp . gr. lying between these two figures. Has "heavy metal" ever been officially defined?

V o w e l V a g a r i e s Four words containing the vowels

a, e, i, o, u in alphabetic order have been reported in this column: abstemi­ous, arsenious, facetious, and parecious. Gordon W . McBride contributes six more, all of which appear in Webster 's New International Dictionary: absten­tious, adventitious (contains two i's, but in the right alphabetic p l a c e ) , af-fectious (obsolete) , arterious, caesious, and materious (obsolete) . Gordon says h e got help from columnists on Washington and Cleveland news­papers, who picked u p the quest. Paul Bêcher 's "aerious" (C&EN April 11) is the shortest yet; Webster lists it as a variant of the obsolete word "aereous."

As for the ruckus started by "thio­urea" (C&EN April 4 ) , Robert F . Raf-fauf of Smith, Kline and French nomi­nates the all-vowel word "Aiouea" (a genus of the family Lauraceae; not in Webster ) . Franklin M. deBeers, Jr., is another who suggested "sequoia." Shall w e now call it quits?

Names of Binary Compounds

In naming compounds of two non-metals it is sometimes hard to know which one should have the -ide ending. The International Union has given the following tentative rule: "In the case of nonpolar compounds of nonmetals, in "which it is often uncertain which constituent might be regarded as elec­tropositive, tha t constituent should be placed first which appears earlier in the sequence B, Si, C, Sb, As, P, N, H , Te, Se, S,' I, Br, Cl, O, F . " Thus, boron suicide, not silicon boride; carbon selenide, not selenium carbide; oxygen fluoride, not fluorine oxide. T h e se­quence follows the order of increasing periodic group number and decreasing atomic number in each group, wi th the exception of hydrogen and oxygen.

Abuse of -lysis?

In Chemistry ir Industry, 1954, 1586, W. Baker protests against the increas­ing tendency to misuse the termination -lysis; he believes it is getting out of hand. T h e formation of poly cyclic hydrocarbons from acetylene is not "pyrolysis" but pyrosynthesis, or poly­merization, and "hydrogenolysis" could often be replaced b y the simpler and more accurate term "reduction." Watch your step, writers!

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