Dihydroxy(phenyl)borane

[98-80-6] C6H7BO2 (MW 121.93) InChI = 1S/C6H7BO2/c8-7(9)6-4-2-1-3-5-6/h1-5,8-9H InChIKey = HXITXNWTGFUOAU-UHFFFAOYSA-N (anhydride) [3262-89-3] C18H15B3O3 (MW 311.74) InChI = 1S/C18H15B3O3/c1-4-10-16(11-5-1)19-22-20(17-12-6-2-7-13-17)24-21(23-19)18-14-8-3-9-15-18/h1-15H InChIKey = VOXXGUAZBWSUSS-UHFFFAOYSA-N (protective group for diols,1c template for CC bond formation; phenylating agent;2 catalyst for hydroalumination;3 chromatography agent1c) Alternate Name: phenylboric acid. Physical Data: mp 216 °C (anhyd); dipole moment 1.72 D (dioxane); pKa 8.86 (25 °C, H2O). Solubility: sol H2O 2.5%, benzene 1.75%, xylene 1.2%, ether 30.2%, methanol 178%. Form Supplied in: white solid, widely available; contains varying amounts of the anhydride. Preparative Method: from Phenylmagnesium Bromide and Trimethyl Borate.1d Purification: crystallization from H2O. Handling, Storage, and Precautions: readily forms trimeric anhydride upon standing or heating (eq 1); moderately toxic by ingestion; mildly toxic by skin contact.4 (1)