The electrically neutral mononuclear hydrides of group 14 having two non-bonding electrons,
the electrically neutral mononuclear hydrides of group 15 having four non-bonding
electrons, and also the compound
HB:.
The names of a number of these are shown below.
| RB: |
boranylidenes |
RAs: |
arsanylidenes |
| RN: |
nitrenes |
R2Sn: |
stannylidenes |
| R2Si: |
silylenes |
RSb: |
stibanylidenes |
| RP: |
phosphanylidenes |
R2Pb: |
plumbylidenes |
| R2Ge: |
germylidenes |
|
|
Note that if
R
=
H, these compounds are parent hydrides; derivatives formed by substitution are named
accordingly. However, if the substituent's first atom, bearing the free
valence, is of the same element as the atom of the carbene analogue, other parent compounds
may be required (see
carbenes ), e.g.
HN:
nitrene;
CH3N:
methylnitrene;
H2NN:diazanylidene (synonym
isodiazene, not
aminonitrene ).
Source:
PAC, 1995, 67, 1307
(Glossary of class names of organic compounds and reactivity intermediates based on
structure (IUPAC Recommendations 1995))
on page 1324