Subhalide

In chemistry, subhalide usually refers to inorganic compounds that have a low ratio of halide to metal, made possible by metal–metal bonding (or element–element bonding for nonmetals), sometimes extensive.

[citation needed] The normal halide of boron is BF3.

Boron forms many subhalides: several B2X4, including B2F4; also BF.

Phosphorus subhalides include P2I4, P4Cl2, and P7Cl3 (structurally related to [P7]3−).

[1] There are many tellurium subhalides, including Te3Cl2, Te2X (X = Cl, Br, I), and two forms of TeI.