Group IUPAC-recommended names

The nomenclature is illustrated by Table 1, which gives the names of the major types of organosulfur compounds. The original name mercaptan for thiols is no longer recommended, except that the term mercapto is retained for the unsubstituted SH group. In the table, an asterisk indicates the International Union of Pure and Applied Chemistry (IUPAC) recommended name. 

Ketones are named by replacing the terminal -e of the corresponding alkane name with -one. The parent chain is the longest one that contains the ketone group, and the numbering begins at the end nearer the carbonyl carbon. As with alkenes (Section 6.3) and alcohols (Section 17.1), the locant is placed before the parent name in older rules but before the suffix in newer IUPAC recommendations. For example ... 

The name tetradehydrocorrin has also been used by the group of Johnson and Murakami for octadehydrocorrin following the IUPAC recommendations the latter name will be used here in order to avoid confusion. 

Because the U.S. groups were not given an opportunity to view and comment on the accuracy of any draft reports from the TWG after their visit to Berkeley in 1998 and their subsequent visit to Dubna in 1999, they were totally taken aback by this rapid publication of the TWG conclusions without the iterative process that they had understood would take place with the involved groups at LBL in the United States, GSI in Darmstadt, Germany, and JINR in Dubna, USSR. In an attempt to counteract this criticism, responses from the Berkeley, Dubna, and GSI groups were invited and published in the IUPAC journal immediately following the TWG Discovery article of 1993 (Barber et al., 1993). The IUPAC then stated that this TWG report could now be considered by the CNIC, which had the responsibility for recommending names. However, it was pointed out that the TWG report had not been subjected to the external and internal review required by the IUPAC prior to publication. 

Since diazoates can be considered to be derived from oximes by substitution of nitrogen for the methine group, Hantzsch (1894) put forward the hypothesis that configurational isomerism was also occurring here. He therefore represented the isomeric diazoates by the structures 7.1 and 7.2, assigning the syn structure (7.1) to the labile diazoate and the anti (7.2) to the stable isomer. Nowadays the description recommended by IUPAC (1979) for such configurational isomers, namely (Z) instead of syn and (E) instead of anti, should be used. 

Figure 1.1 Principal features of the periodic table. The International Union of Pure and Applied Chemistry (IUPAC) now recommends Arabic group numbers 1-18 in place of the traditional Roman I—VIII (A and B). Group names include alkali metals (1), alkaline earth metals (2), coinage metals (11), chalcogens (16), and halogens (17). The main groups are often called the s,p block, the transition metals the d, block elements, and the lanthanides and actinides the / block elements, reflecting the electronic shell being filled. (See inside front cover for detailed structure of the periodic table.)...

In the now well-entrenched sub-discipline ("fiefdom") of natural products, Buckingham [21] advises "There is one major departure from recommended IUPAC nomenclature rules that is made by almost all those publishing in natural products... that each name shall have only one principal group." In other words, a major subset of "organic" chemists do not subscribe to the official nomenclature of their own domain, and a uniform... 

In the past, some elements were given two names because two groups claimed to have discovered them. To avoid such confusion it was decided in 1947 that after the existence of a new element had been proved beyond reasonable doubt, discoverers had the right to suggest a name to IUPAC, but that only the Commission on Nomenclature of Inorganic Chemistry (CNIC) could make a recommendation to the IUPAC Council to make the final decision. 

In mid-2003, the joint working party assigned credit for discovery of element 111 to the GSI group and asked them to propose a name (Karol et al., 2003), but the evidence for discovery of element 112 was still deemed insufficient. The name roentgenium, symbol Rg, in honor of Wilhelm Conrad Roentgen, who discovered X-rays in 1895, was proposed for element 111 by the discovery group. In May 2004 a provisional recommendation for approval of the proposal (Corish and Rosenblatt, 2004) was sent to the IUPAC Bureau and Council, and it was approved in November 2004. 

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