Red_Book_2005

IR-2.10
(d) In coordination compounds, to designate the symbols of the atom or atoms of aligand
(usually polydentate) towhich the central atom is bound, whether the kappa convention is
used or not. (See Section IR-9.2.4.4.)
Example:
3.
O
C
H 2 C
O
N
H 2
Pt
O
N
H 2
C
CH 2
cis-bis(glycinato-k N , k O )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 3 N Cl
Co
H 3 N Cl
NH 3
[CoCl3 (NH3 ) 3 ] (OC-6-22)-triamminetrichloridocobalt(III)
(g) Other uses of italicized capital 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. (HBO2 ) n
n þ
6. Fe
IR-2.10 GREEKALPHABET
Greek letters (in Roman type) are used in systematic inorganic nomenclature as follows:
D to show absolute configuration, or as astructural descriptor to designate deltahedra
(see Section IR-9.3.4);
d to denote the absolute configuration of chelate ring conformations (see Section IR-
9.3.4); in solid-state chemistry to indicate small variations ofcomposition (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 aligand (see Sections IR-9.2.4.3 and IR-10.2.5.1);
O
GRAMMAR
35