NOMENCLATURE™ by AUSTShS M.
PATTiRSON
Names f o r Vitamins In addition to the vitamin names a p proved some time ago [C&EN, 30, 104 ( 1 9 5 2 ) ] by the Commission on Biochemical Nomenclature of the International Union, t h e commission has m a d e some later proposals, (Comptes rendus 17th Conference, 149-50): Phylloqiiinone to be the trivial n a m e of 2-methyl-3-phytyl-l,4-naphthoquinone, a n d farnoquinone t h a t of 2-difarnesyl-3-methyl-l,4-naphthoquinone. Pyridoxine to b e used as a group name to designate t h e naturally occurring pyridine derivatives with vitamin B 6 activity. Derivatives of 3-hydroxy - 5 - hydroxymethyl - 2,4 - dimethylpyridine in which t h e 4-methyl group is replaced by o n e of the following groups will h a v e t h e trivial n a m e : if b y C H 2 O H , pyridoxol; if by C H O , pyridoxal; if by CHUN H L,, pyridoxamine. Mesoinositol will continue to b e so called for the present. Pteroic acid designates the compound formed by t h e linkage of carbon no. 6 of 2-amino-4-liydroxypteridine by means of a methylene group with the nitrogen atom of p-aminobenzoic acid. T h e pteroylglutamic acids may be designated generically as folic acids. The p u r e substance h i t h e r t o known as folic acid, folacine, or vitamin B t . shall be n a m e d pteroylmonoglutamic acid. Compounds analogous to it b u t containing several glutamic acid residues united by amide linkages m a y b e named pteroyltriglutamic acid, pteroylheptaghitamic acid, e t c . " A d d i t i v e " Names T h e term "additive names" w a s a p plied by Patterson a n d Curran in 1917 (/. Am. Chem. Soc, 3 9 , 1625) to names of the type "naphthaleneacetic acid," which are formed by a d d i n g t h e n a m e of one compound to that of another, without change. A c o m p o u n d so denoted may be thought of as formed b y "mutual substitution/' with loss of hydrogen from each of the two simpler compounds: C 1 0 H 8 -+- C H 3 C 0 2 H —> C 1 0 H 7 C H 2 C O 2 H -h 2 H . Such names have b e e n found useful b y Chemical Abstracts for indexing purposes and t h e term "additive/' w h i c h was a d o p t e d without serious thought, has b e e n retained. However, t h e term has been misunderstood b y some to refer to addition compounds. This is a différent matter. "Hydrazine hydrochloride," for example, is the n a m e of an 221 North King St., Xenia, Ohio. VOLUME
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addition comnound b u t is not an additive n a m e in the CA sense. At the meeting of t h e Organic Division committee in Cincinnati it was suggested that the word "additive" be d r o p p e d a n d replaced by some other term, such as "conjunctive" or "conjoined," which would not suggest the union of molecules without loss. Any opinions? "Europia": A Late Comer W i t h our issue of May 2 we h a d exp e c t e d to close the interesting interc h a n g e on "Vowel Vagaries/* b u t we must now reopen it long e n o u g h to a d m i t "europia," submitted b y Robert E , McCoy of D o w as a short word containing all five major vowels. It seems to be the only such chemical w o r d shorter than "thiourea." Europia, a perfectly good term for europ i u m trioxide, E u 2 0 3 , has strangely enough not m a d e its way into Webster b u t is found in t h e chemical dictionaries of Bennett, Koglin, and Miall.
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C o m m i t t e e on Dictionary Usage Committee E-8 on Nomenclature and Definitions, of t h e American So ciety for Testing Materials, has organ ized a subcommittee on dictionary usage. Its purpose is cooperation be t w e e n the ASTM a n d dictionary p u b lishers with regard to the establishment a n d general acceptance of definitions of technical terms. Albert E . Miller of Sinclair Refining is chairman of the n e w subcommittee, the first meeting of which was held in N e w York April 27. T h e work promises to b e of ad vantage to both technical men and dic tionary makers.
JUNE
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d~rs or 2-3's? At the Cincinnati meeting of the Committee on Nomenclature of the ACS Division of Organic Chemistry the report of the advisory committee on isotopically labeled organic compounds r e c o m m e n d e d that in organic names deuterium b e designated as H 2 and tritium as H 8 . This, if a d o p t e d , would m e a n that the d and t of the modified Boughton nomenclature now used by Chemical Abstracts and others would b e replaced by the above symbols. Example: propane-2-H 2 , instead of propane-2-(i. This change is objected to b y some, on the ground of established usage of d and t, desire for uniformity with inorganic practice, present use of H in organic names to denote "indicated hydrogen," a n d present use of D and Τ in formula indexes. Any opinion about t h e proposal?
THAT
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