Heteroboranes are classes of
boranes
Boranes is the name given to compounds with the formula BxHy and related anions. Many such boranes are known. Most common are those with 1 to 12 boron atoms. Although they have few practical applications, the boranes exhibit structures and bon ...
, at least one
boron atom is replaced by another element. Like many of the related
boranes
Boranes is the name given to compounds with the formula BxHy and related anions. Many such boranes are known. Most common are those with 1 to 12 boron atoms. Although they have few practical applications, the boranes exhibit structures and bon ...
, these clusters are
polyhedra
In geometry, a polyhedron (plural polyhedra or polyhedrons; ) is a three-dimensional shape with flat polygonal faces, straight edges and sharp corners or vertices.
A convex polyhedron is the convex hull of finitely many points, not all on t ...
and are similarly classified as ''closo-, nido-, arachno-, hypho-,'' according to the so-called
electron count. ''Closo-'' represents a complete polyhedron, while ''nido-'', ''arachno-'' and ''hypho-'' stand for polyhedrons that are missing one, two and three vertices.
Structurally, various heteroboranes can be derived from the icosahedral (''I''
h)
B12H122– via formal replacement of its BH fragments with isoelectronic CH
+, P
+ or S
2+ fragments, e.g. ''closo''-1-CB
11H
12–, ''closo''-1,2-C
2B
10H
12, ''closo''-1,2-P
2B
10H
10 or ''closo''-1-S
B
11H
11.
See also
*
Carborane
Carboranes are electron-delocalized (non-classically bonded) clusters composed of boron, carbon and hydrogen atoms.Grimes, R. N., ''Carboranes 3rd Ed.'', Elsevier, Amsterdam and New York (2016), . Like many of the related boron hydrides, these ...
*
Azaborane
References
{{reflist
Boron compounds
Cluster chemistry
Boranes