Page 45 - Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005)
P. 45

G R A M  M  A R                                                    I  R-2.12




                       k   as a  l igating atom designator in the kappa convention (see Sections IR-9.2.4.2 and
                           IR-10.2.3.3);
                       L    to show absolute  c onfiguration (see Section IR-9.3.4);
                       l   to indicate non-standard bonding number in the lambda convention (see Section
                           IR-6.2.1 and Section P-14.1 of Ref.1); t o  d enote  t he absolute  c onfiguration of chelate
                           ring conformations (see Section IR-9.3.4);
                       m   to designate a  b ridging  l igand (see Sections IR-9.2.5.2 and IR-10.2.3.1).

           IR-2.11     A S T E R I S K S


                       The asterisk (*) is used in formulae as a  r ight s uperscript to the symbol of an element, in
                       the following ways:
                       (a) To highlight a  c hiral centre.

                       Example:

                           1.                         H C     H
                                                       2
                                                           C
                                                            ∗
                                                       H   C   CH 3
                                                           CHMe 2
                       This usage has been extended to label a  c hiral ligand or a  c hiral centre in coordination
                       chemistry.

                       Example:
                           2.                        Me
                                                  H
                                                     C *
                                                  Ph                 S
                                                                  C
                                                              V *
                                                                  S



                       (b) To designate  e xcited  m  olecular or nuclear states.

                       Example:

                           3. NO*


           IR-2.12     P R I M  E S

                       (a) Primes ( ), double primes ( ), triple primes ( ), etc. may be used in the names and
                                                                000
                                 0
                                                 00
                       formulae of coordination compounds in the following ways:
                        (i) within ligand names, in order to differentiate between  s ites of substitution;
                        (ii) when specifying donor atoms (IR-9.2.4.2),  i n  o rder to differentiate between  d onor
                            atoms;


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