(b) The derived radicals are named by changing the final "e" to "o"
(c) Selenium analogues are named similarly, by use of "seleno-" in place of "thio-".
(d) Numbering of these compounds and radicals, and formation of names of derivatives, are carried out as indicated for the oxygen compounds .
See Recommendations'93 Table 31(a)
Examples to Rule C-985.1
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