Boron trichloride is the inorganic compound with the formula BCl₃.
Boron is an element.
BH is not stable, there is no compound by that formula. BH3 (boron hydride) generally exists as the dimer, B2H6, diborane.
Boron Sulfide is a chemical compound with the formula B₂S₃. B = Boron S = Sulfur Its molar mass is 117.8 g/mol.