Diborane photolysis

The overall mechanism for the reaction is consistent with the quantum yields observed for photolysis at various pressures of B2H6. Attempts to produce BH3 by photolysis of diborane(6) in matrix studies have consistently failed. At the present time there is no physical evidence to support this step in the mechanism. 

Reviews have appeared of laser Induced photochemical reactions of diborane and its mixtures with other compounds, the interaction of 0( D) atoms with O3 during UV photolysis, and of polysilane high polymers. ... 

Mixtures of P2F4 and ethylene give l,2-bis(difluorophosphino)ethane either on photolysis in a quartz reactor or by heating to 300 °C in a sealed tube.208 Full spectroscopic data confirm the structure of the product. The compound displays dibasic character on treatment with diborane, with BH3 groups being attached to each phosphorus atom. 

It was initially observed by Stock (302) that irradiation of diborane with ultraviolet light causes an increase in volume and the deposition of a yellowish white crystalline solid. More recently, in both the mercury-photosensitized decomposition (147) and the monochromatic photolysis by ultraviolet radiation of... 

Laser photolysis of diborane, using ArF irradiation at 193 nm, forms BH, BH2, or BH3 depending on laser power [2 to 4]. Pyrolysis of BgHn proceeds via the formation of molecular hydrogen and diborane(6) as the primary volatile products. The presence of added H2 increases the rate of diborane(6) formation [5, 6]. 

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