Page 44 - Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005)
P. 44

IR-2.10                                                       G R A M  M  A R





                       (d) In coordination compounds, to designate the symbols of the atom or atoms of a  l igand
                       (usually polydentate) t o  w  hich the central atom is bound, whether the kappa convention is
                       used or not. (See Section IR-9.2.4.4.)


                       Example:
                           3.                    O                  O
                                                     C  O     O  C
                                                           Pt
                                                   H C  N     N  CH 2
                                                    2
                                                        H 2   H 2
                                               cis-bis(glycinato-kN,kO)platinum

                       (e) In solid-state chemistry, in Pearson and crystal system symbols. (See Sections IR-3.4.4
                       and IR-11.5.)

                       (f) Italicized capital letters are used in polyhedral symbols. (See Section IR-9.3.2.1.)


                       Example:

                           4.                               Cl
                                                       H N     Cl
                                                        3
                                                           Co
                                                       H N     Cl
                                                        3
                                                            NH 3
                                  [CoCl 3 (NH 3 ) 3 ]  (  OC-6-22)-triamminetrichloridocobalt(III)
                       (g) Other uses of italicized  c apital letters are as locants in substitutive nomenclature (see, for
                       example, Section IR-6.2.4.1), and the letter H for indicated hydrogen (see, for example,
                       Section IR-6.2.3.4). Italic lower case letters are used to represent numbers, especially in
                       formulae where the numbers are undefined.

                       Examples:

                           5. (HBO 2 ) n
                           6. Fe nþ


           IR-2.10     G R E E K  A  L P H A B E T


                       Greek letters (in Roman type) a re used in systematic inorganic nomenclature as follows:
                       D   to show absolute configuration, or as a  s tructural descriptor to designate  d eltahedra
                           (see Section IR-9.3.4);
                       d   to denote  t he absolute configuration of chelate ring conformations (see Section IR-
                           9.3.4); in solid-state chemistry to indicate small variations o f c omposition (see Section
                           IR-11.3.2); to designate cumulative double bonds in rings or ring systems (see Section
                           P-25.7 of Ref. 1);
                       Z   to designate the hapticity of a  l igand (see Sections IR-9.2.4.3 and IR-10.2.5.1);


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