Page 29 - Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005)
P. 29

G R A M  M  A R                                                     I  R-2.2





                       (Compare with the use of parentheses for isotopically  s ubstituted compounds in Section
                       IR-2.2.3.2, and also see Sections II-2.4.2.3, I I-2.4.2.4 and II-2.4.3.3 of Ref. 2.)


                       Examples:
                                     2
                                                       15
                               15
                                                   2
                           1. [ N]H 2 [ H]         [ H 1 , N]ammonia
                           2. HO[ O]H  18          d  ihydrogen [  18 O 1 ]peroxide
                       For more  d etails, see Section II-2.4 of Ref. 2.
                       (b) When naming organic ligands and organic parts of coordination compounds the use of
                       square brackets  o beys the principles  o f  o rganic nomenclature. 1


                       Example:
                           3.
                                                         Cl            3+




                                                   H N    H N  N H
                                                        Co

                                                   H N    H N  N H




                                                         Cl

                                1,8-dichloro-3,6,10,13,16,19-hexaazabicyclo[6.6.6]icosanecobalt(3þ)

                       (c) In chain and ring  n omenclature, square brackets a re used to enclose the nodal descriptor
                       (Section IR-7.4.2 and Chapter II-5 of Ref. 2).

                       Examples:

                           4. HSSH *             1,4-dihydrony-2,3-disulfy-[4]catenate( * 1 )
                           5.
                                                       S   1  S
                                                    S  12  N     S
                                                   S      13  S   S 4
                                                    S     N      S
                                                       S   7  S
                                                                   1,7
                                            1,7-diazyundecasulfy-[012.1 ]dicycle
           IR-2.2.3    Parentheses


           IR-2.2.3.1  Use in formulae
                       Parentheses are used in formulae in the following ways.


                       20
   24   25   26   27   28   29   30   31   32   33   34