Generic Formula of Boranes
The four series of single-cluster boranes have the following general formulae, where "n" is the number of boron atoms:
| Type | formula | notes |
|---|---|---|
| closo− | BnHn2− | No neutral BnHn+2 boranes are known |
| nido− | BnHn+4 | |
| arachno− | BnHn+6 | |
| hypho− | BnHn+8 | only adducts established |
There also exists a series of substituted neutral hypercloso-boranes that have the theoretical formulae BnHn. Examples include B12(OCH2Ph)12, which is a stable derivative of hypercloso-B12H12.
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