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

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);

35