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1·The toxic hydrogen selenide gas was reduced, while the utilization of sodium borohydride was over a lot when the PEG-400 instead of ethanol.

相对于乙醇、水等作为介质合成二硒醚，以PEG - 400为介质减少了剧毒气体硒化氢的排放，同时硼氢化钠的利用率有所提高。