# What are the names of "B"_3"H"_9 and "B"_4"H"_12?

Sep 8, 2015

The names are triborane(9) and tetraborane(12).

#### Explanation:

The IUPAC rules for naming boron hydrides are:

• Boron hydrides are called boranes, and the name of ${\text{BH}}_{3}$ is borane.
• The number of boron atoms is indicated by an appropriate numerical prefix.
• The number of hydrogen atoms is indicated by an Arabic numeral in parentheses immediately following the name.

∴ The names are triborane(9) and tetraborane(12).