From haloethanes

To see qualitatively why the vibrationally adiabatic picture breaks down, consider HX elimination from haloethane, H3C—CH2X H2C=CH2 + HX. Here... 

Rao, Velliyur Nott Malhkaijun Rosenfeld, H. David Subramoney, Shekhar Subra-manian, Munirpallam A. Sievert, Allen C. Fluorination process and catalyst for the preparation of 1,1,1,2,2-pentafluoroethane from haloethanes and/or haloethylenes and hydrogen fluoride. WO 2004018396Al-20040304 (2004). 

Glyoxal has been obtained by several methods, only a few of which are of preparative value. The most feasible are the oxidation of acetaldehyde by nitric3 4 5 or selenious6 acid the hydrolysis of dichlorodioxane 7 and the hydrolysis of the product resulting from the action of fuming sulfuric acid upon tetra-haloethanes.8... 

To probe the effects of HCFC structure on toxicity the metabolism of three penta-haloethanes, HCFC-123, HCFC-124, and HCFC-125 were studied. The three compounds differ one from the other by the number of fluorine atoms present in the /3-carbon (Fig. 4.64). It was found that the enthalpies of activation, AHact, for hydrogen atom abstraction paralleled the rate of trifluoroacetic acid excretion suggesting that the more difficult it was... 

Summary of AE s Obtained in Several Ways for Some Liquid Haloethanes which have Two Equivalent gauche Forms (From Gutowsky, Belford and McMahon, 1962)... 

---