Page 109 - Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005)

S U B S T I T U T I V E N O M E N C L A T U R E IR-6.2

compared w ith parent polyboranes, and for numbering purposes only the parent boron
skeleton is considered.

Examples:

4.

10 6
5
9 5
8 7
1 1
2
4 4 2
3 3

= C o

5
6,9-bis(pentamethyl-Z -cyclopentadienyl)-5,6:6,7:8,9:9,10-tetra-mH-6,9-dicobalta-
nido-decaborane(12) (one terminal hydrogen atom on each boron atom omitted for
clarity)

5. 1

3 2 CO
4
CO
5
CO

6
= F e
2,2,2-tricarbonyl-1,6-dicarba-2-ferra-closo-hexaborane(5) (one terminal
hydrogen atom on each boron and carbon atom omitted for clarity)

IR-6.2.4.5 Heteronuclear polycyclic parent hydrides

Parent n ames of heteronuclear polycycles may be constructed by three methods:

(i) specifying the fusion of relevant m onocycles (see Section P-25.3 of Ref. 1), named by
the Hantzsch–Widman system (see Section IR-6.2.4.3);
(ii) using replacement prefixes ( ‘a’ terms) from Table X t o s pecify replacement of carbon
atoms in the corresponding carbocyclic compound. Heteroatoms a re cited in the order
given by Table VI and appropriate multiplicative prefixes a re added;
(iii) for ring systems consisting of repeating units, using the von Baeyer notation to specify
the ring structure combined w ith the appropriate multiplicative prefix and the
replacement prefixes from Table X a ppropriate to the repeating unit, cf. t he names
discussed i n S ection IR-6.2.4.2.

100