Boron forms a number of different complexes with hydrogen, collectively called boranes. They often feature electron-deficient bonding in the form of bridging H groups, as in the simplest such complex, B₂H₆. If nothing else, they're cool molecules to look at.

Note the connecting lines generally do not represent "normal" 2c2e bonds, but rather are meant to convey a sense of the framework of the atoms. Bonding in higher boranes and other clusters will be described later in the course, time and weather permitting.

B2H6	B4H10	B5H9

[B6H6]2–	B10H14	[B12H12]2–

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