Page 38 - Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005)
P. 38

IR-2.5                                                        G R A M  M  A R





                       (d) In chains and rings nomenclature, to separate nodal descriptors of individual modules
                       of an assembly (see Section IR-7.4.2).


           IR-2.5.3    Commas
                       Commas are used in the following ways.

                       (a) To separate locants.

                       Example:
                           1. SiH 2 ClSiHClSiH 2 Cl   1,2,3-trichlorotrisilane


                       (b) To separate the symbols of the ligating atoms of a  p olydentate ligand.

                       Example:

                           2. cis-bis(glycinato-kN,kO)platinum

                       (c) In solid-state chemistry, to separate symbols of atoms occupying the same  t ype of site
                       in a  r andom  f ashion.

                       Example:

                           3. (Mo,W) n O 3n-1

                       (d) To separate oxidation numbers in a  m  ixed valence compound.

                       Example:

                           4.                                             5+
                                            (H N) Ru  N      N  Ru(NH )
                                                                      3 5
                                                 5
                                              3
                                             [(H 3 N) 5 Ru(m-pyz)Ru(NH 3 ) 5 ] 5รพ
                                        m-pyrazine-bis(pentaammineruthenium)(II,III)

                       (e) To separate symbols of labelled atoms in selectively labelled compounds. ( See Section
                       II-2.4.3.3 of Ref. 2.)

                       Example:
                              18  32               18  32
                           5. [ O, P]H 3 PO 4      [ O, P]phosphoric  a cid



           IR-2.5.4    Semicolons
                       Semicolons  a re used in the following ways.
                       (a) In the names of coordination compounds, t o  o rder locants already separated by commas,
                       as in the kappa convention. (See examples in Section IR-9.2.5.6.)


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