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The National Research Council Chemical Code
Pages 127-132

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From page 127...
... THE NATIONAL RESEARCH COUNCIL CHEMICAL CODE Harriet A Geer Chemical-Biological Coordination Center National Research Council Washington, D
From page 128...
... The second and third digits of the code designations classify the elements of these families according to their oxidation state, which is calculated in the conventional way by assuming that enough shared electrons to fill the outer shell of the more electron-attracting atom belong to that atom. Families S -- , U -- and V -- classify coordinate or solvate groups which act as units.
From page 129...
... Polycarbocyclic rings are coded as a unit and are not separated into their component structures. With the exception of a 6-membered ring fused to a heterocyclic structure, the same code designation is used for carbocyclic structures fused to a heterocyclic ring as for those which are not.
From page 130...
... Only one K+ is indicated because in ionic structures the fourth digit shows the actual number of atoms present in the ion. Co is the central element of a complex anion and is therefore coded in Family T -- .
From page 131...
... Of the 28 structures, two were quinoline compounds with a hydroxy and amino group on the carbocyclic ring, the other 26 contained the hydroxy and amino groups on different rings. The NRC Chemical Code has been published and may be purchased from the National Research Council Publications Office 2101 Constitution Avenue, N


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