Page 107 - 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

6. 1
6 S 2
HB BH
S 4 S
5 B 3
H

(i) H–W name: 1,3,5,2,4,6-trithiatriborinane
(ii) 1,3,5-trithia-2,4,6-triboracyclohexane
(iii) cyclotriborathiane

The names borazole, boroxole and borthiole, respectively, for the three compounds in
Examples 4, 5 a nd 6 h ave been abandoned long ago as they imply five-membered rings
in the Hantzsch–Widman system. T he names borazin(e), b oroxin and borthiin indicate
six-membered r ings with unsaturation and only one boron atom and one other h eteroatom
(although the order of the element name s tems is wrong) and are also n ot acceptable.

Example:

7. 1
6 N 2
HSi SiH

N 4 N
5 Si 3
H
(i) H–W name: 1,3,5,2,4,6-triazatrisiline
(ii) 1,3,5-triaza-2,4,6-trisilacyclohexa-1,3,5-triene

Where ring atoms have a c onnectivity different from their standard b onding number (see
Section IR-6.2.1), their actual bonding number is expressed as an arabic superscript to the
Greek letter lambda following immediately after an appropriate locant.

Example:
8. 1
6 N 2
H 2 P PH 2

N 4 N
5 P 3
H 2
5
5
5
(i) H–W name: 1,3,5,2l ,4l ,6l -triazatriphosphinine
5
5
5
(ii) 1,3,5-triaza-2l ,4l ,6l -triphosphacyclohexa-1,3,5-triene
IR-6.2.4.4 Skeletal replacement i n b oron hydrides
It is possible that the essential skeletal structure of the boron hydrides is preserved i n
derivatives in which one or more of the boron atoms are replaced b y o ther atoms. The names

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