Crystal structure of tetraphenyldiboroxane a monomer diboroxane

Commonly known syntheses of triphenylborane lead to products of varying purity. Because of by-products, the individual batches of triphenylborane samples have different reactivity and leading to different reaction products. Tetraphenyldiboroxane as the main by-product of the BPh3 synthesis was isolated and characterized by means of 11B-NMR and X-ray structure analysis.