Silicon, Germanium, Tin and Lead

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Compounds having rings of alternating silicon and nitrogen atoms: NOC Rule D-6.42.

cyclosiloxanes:*

Compounds having rings of alternating silicon and oxygen atoms. NOC Rule D-6.23. E.g. 2,2-dimethylcyclotrisiloxane.

germylenes: See germylidenes.

germylidenes:*

Carbene analogues having the structure R₂Ge: . The older synonym germylenes is no longer recommended. RNRI Rule RC-81.1.3.2.

plumbylenes: An older, no longer recommended name for plumbylidenes.

plumbylidenes:*

Carbene analogues having the structure R₂Pb: . RNRI Rule RC-81.1.3.2.

silanes:*

Saturated silicon hydrides, analogues of the alkanes; i.e. compounds of the general formula Si_nH_2n+2. NOC Rule D-6.11. Silanes may be subdivided into silane, oligosilanes and polysilanes. Note: hydrocarbyl derivatives and other derivatives are often referred to loosely as silanes.

silanols:

1. In a strict sense, hydroxy derivatives of silanes: Si_nH_2n+1OH.

2. A name commonly applied to Si-hydrocarbyl derivatives, R₃SiOH, of silanol, H₃SiOH.

silasesquiazanes:*

Compounds in which every silicon atom is linked to three nitrogen atoms and every nitrogen atom is linked to two silicon atoms, thus consisting of SiH and NH units, and having the general formula (SiH)_2n(NH)_3n . NOC Rule D-6.61. By extension hydrocarbyl derivatives are commonly included.

silasesquioxanes:*

Compounds in which every silicon atom is linked to three oxygen atoms and every oxygen atom is linked to two silicon atoms, and having the general formula (SiH)_2nO_3n . NOC Rule D-6.61. By extension hydrocarbyl derivatives are commonly included.

silasesquithianes:*

Compounds in which every silicon atom is linked to three sulfur atoms and every sulfur atom is linked to two silicon atoms, and having the general formula (SiH)_2nS_3n . NOC Rule D-6.61. By extension hydrocarbyl derivatives are commonly included.

silathianes:*

Compounds having the structure H₃Si[SSiH₂]_nSSiH₃ and branched-chain analogues. They are analogous in structure to siloxanes with -S- replacing -O-. NOC Rule D-6.31. By extension hydrocarbyl derivatives are commonly included.

silazanes:*

Saturated silicon-nitrogen hydrides, having straight or branched chains. They are analogous in structure to siloxanes with -NH- replacing -O-. NOC Rule D-6.41. E.g. H₃SiNHSiH₂NHSiH₃ trisilazane. By extension hydrocarbyl derivatives are commonly included.

silicones:

Polymeric or oligomeric siloxanes, usually considered unbranched, of general formula [-OSiR₂-]_n (R not equal to H).

siloxanes:*

Saturated silicon-oxygen hydrides with unbranched or branched chains of alternating silicon and oxygen atoms (each silicon atom is separated from its nearest silicon neighbours by single oxygen atoms). The general structure of unbranched siloxanes is H₃Si[OSiH₂]_nOSiH₃. See also silicones. NOC Rule D-6.21. H₃Si[OSiH₂]_nOSiH[OSiH₂OSiH₃]₂ is an example of a branched siloxane. By extension hydrocarbyl derivatives are commonly included.

silyl groups:

1. In a strict sense, the silyl group is H₃Si- . NOC Rule D-6.12.

2. A name commonly applied to hydrocarbyl derivatives of the silyl group: R₃Si-.

silyl radicals:

1. In a strict sense, the silyl radical is H₃Si^. . NOC Rule D-5.81.

2. A name commonly applied to the silicon-centered radicals: R₃Si^. .

silylenes:*

Carbene analogues having the structure R₂Si: . RNRI Rule RC-81.1.3.1.

stannoxanes:

Compounds having the structure H₃Sn[OSnH₂]_nOSnH₃. Thus tin analogues of siloxanes.

stannylenes: See stannylidenes.

stannylidenes:*

Carbene analogues having the structure R₂Sn: . The older synonymous term stannylenes is no longer recommended. RNRI Rule RC-81.1.3.2.