连续CO_(2)激光引发的1,1-二氟乙烷与氯的反应

The CW-CO2 Laser Induced Reaction of 1, 1-Difluoroethane with Chlorine

本文报道了CW-CO_(2)激光引发的CF_(2)HCH_(3)与Cl_(2)的反应.除主要产物CF_(2)=CH_(2)外,还有CF_(2)ClCH_(3)、CF_(2)ClCH_(2)Cl、CF_(2)=CHCl、CF_(2)=CCl_(2)和CF_(2)Cl_(2).为了探索应用激光方法合成(CF_(2)=CH_(2)的可能性.

The CW-CO_(2) laser induced reaction of CF_(2)HCH_(3)(1)with Cl_(2) yields vinylidene fluoride(2)as the main product;other products are CH3CF_(2)Cl(3),CF_(2)ClCH_(2)Cl(4),CF_(2)=CHCl(5),CF_(2)=CCl_(2)(6)and CF_(2)Cl_(2)(7).The yield dependence of 2 on the CF_(2)HCH_(3)/Cl_(2) ratio,the laser irradiation time,the laser power and the pressure of the gaseous reactants have been investigated.Furthermore,the TEA-CO2 laser induced reaction of 1 with Cl_(2),the CW-CO_(2) laser induced reaction of 2 and 2 with Cl_(2) have also been studied in order to gain more mechanistic insights for this complicated reaction system.Apparently,CF_(2)ClCH_(3) but not CF_(2)HCH_(2)Cl,is the main precursor to 2.Interestingly,it has been found that the relatively strong double bond of CF_(2)=CH_(2) can be broken by laser irradiation.The possibility ef applying this laser methodology to the production of vinylidene fluoride has been discussed.