Give the industrial preparation for diborane.
(N/A) The industrial preparation of diborane $(B_{2}H_{6})$ involves the reaction of boron trifluoride $(BF_{3})$ with sodium hydride $(NaH)$ at $450 \ K$:
$2 BF_{3} + 6 NaH \xrightarrow{450 \ K} B_{2}H_{6} + 6 NaF$
$2 BF_{3} + 6 NaH \xrightarrow{450 \ K} B_{2}H_{6} + 6 NaF$
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